Resveratrol-Based Tri-Functional Benzoxazines: Synthesis, Characterization, Polymerization, and Thermal and Flame Retardant Properties
Publication date: Available online 19 April 2019Source: European Polymer JournalAuthor(s): Kan Zhang, Mengchao Han, Lu Han, Hatsuo IshidaAbstractA series of thermally stable resveratrol-based tri-functional benzoxazine resins have been synthesized using resveratrol, different amines (aniline, 4-chloroaniline and 3-aminophenylacetylene) and paraformaldehyde. The molecular structures of these benzoxazines have been characterized by 1H and 13C NMR spectroscopy and FT-IR spectroscopy. The assignments for the characteristic protons and carbons in oxazine rings are confirmed using two-dimensional (2D) NMR techniques, including 1...
Source: European Polymer Journal - April 19, 2019 Category: Chemistry Source Type: research

Effect of the functionalization of CdS nanoparticles in the in-situ synthesis of P3HT/CdS composites
Publication date: Available online 18 April 2019Source: European Polymer JournalAuthor(s): S. García-Carvajal, D. Hernández-Martínez, I. Linzaga-Elizalde, P. Altuzar-Coello, J.L. Maldonado, M.E. NichoAbstractIn this work, in-situ oxidative synthesis and properties of composites based in poly(3-hexylthiophene) (P3HT) with functionalized cadmium sulfide (CdS) nanoparticles (P3HT/CdS) are reported. CdS nanoparticles were synthesized by chemical precipitation and they were functionalized with diethyl[2-hydroxy-2-(thiophen-3-yl)ethyl] phosphonate. P3HT-CdS composites were synthesized by in-situ oxidative po...
Source: European Polymer Journal - April 19, 2019 Category: Chemistry Source Type: research

Dually responsive nanogels as smart carriers for improving the therapeutic index of doxorubicin for breast cancer
Publication date: Available online 15 April 2019Source: European Polymer JournalAuthor(s): Julio César Cuggino, Gerardo Gatti, Matías Luis Picchio, Mariana Maccioni, Luis Marcelino Gugliotta, Cecilia Inés Alvarez IgarzabalAbstractNanocarriers can significantly improve the therapeutic index of drug in cancer therapy. At present, parenteral administration of free doxorubicin (Dox) to treat breast tumor produces severe side effects including cardiotoxicity. This work reports the preparation of N-isopropyacrylamide/acrylic acid nanogels (NGs), NIPA/AAc NGs, crosslinked by a disulfide-bearing monomer, which...
Source: European Polymer Journal - April 16, 2019 Category: Chemistry Source Type: research

Thermoresponsive double network hydrogels composed of poly(N-isopropylacrylamide) and polyacrylamide
Publication date: Available online 15 April 2019Source: European Polymer JournalAuthor(s): Ivan Krakovský, Hana Kouřilová, Martin Hrubovský, Jan Labuta, Lenka HanykováAbstractTemperature response of double network (DN) hydrogels composed of thermoresponsive poly(N-isopropylacrylamide) (PNIPAAm) and hydrophilic polyacrylamide (PAAm) was studied by a combination of swelling and mechanical measurements, differential scanning calorimetry (DSC) and 1H nuclear magnetic resonance (NMR) spectroscopy. A series of DN hydrogels with tightly crosslinked first network of PNIPAAm and loosely crosslinked seco...
Source: European Polymer Journal - April 16, 2019 Category: Chemistry Source Type: research

Gradient Copolymers – Preparation, Properties and Practice
Publication date: Available online 16 April 2019Source: European Polymer JournalAuthor(s): Md. Mahbub Alam, Kevin S. Jack, David J.T. Hill, Andrew K. Whittaker, Hui PengAbstractGradient copolymers are members of a unique class of copolymer in which the monomer composition changes gradually from one end of the polymer chain to the other. In general, the properties of copolymers are strongly dependent on composition and sequence distribution, and hence gradient copolymers can exhibit unique properties compared to those of block and statistical copolymers. This review presents an overview of the methods of synthesis of gradie...
Source: European Polymer Journal - April 16, 2019 Category: Chemistry Source Type: research

Gold nanoparticle/reduced graphene oxide hybrids for fast light-actuated shape memory polymers with enhanced photothermal conversion and mechanical stiffness
Publication date: Available online 15 April 2019Source: European Polymer JournalAuthor(s): Song-tai Li, Xin-zheng Jin, Yao-wen Shao, Xiao-dong Qi, Jing-hui Yang, Yong WangAbstractA fast light-actuated shape memory polymer (SMP) composite with greatly enhanced photothermal conversion and mechanical stiffness was prepared by incorporating gold nanoparticle/reduced graphene oxide (AuNP-RGO) hybrids into cross-linked poly(ε-caprolactone) (PCL). The AuNP-RGO hybrids with AuNPs uniformly anchored on RGO sheets were obtained in a water/n-butylamine system. Due to the homogeneous dispersion of AuNP-RGO in PCL matrix and th...
Source: European Polymer Journal - April 16, 2019 Category: Chemistry Source Type: research

Synthesis, Characterization and Cytotoxicity Studies of Nanocrystalline Cellulose from the Production Waste of Rubber-wood and Kenaf-bast Fibers
Publication date: Available online 13 April 2019Source: European Polymer JournalAuthor(s): Tuerxun Duolikun, Thiruchelvi Pulingam, Nurul Izza Nordin, Chen You Wei, Jahangir bin Kamaldin, Nurhidayatullaili Binti Muhd Julkapli, Lee Hwei Voon, Leo Bey Fen, Mohd Rafie Bin JohanAbstractIn the present study, nanocrystalline cellulose (NCC) was successfully prepared from raw rubberwood fiber (RRaw) and raw Kenaf-bast fiber (KRaw) via a series of multi-step chemical-mechanical purification techniques, namely, alkalization treatment, hydrogen peroxide bleaching and acid hydrolysis. The obtained nanocellulose yields were 27.51% and ...
Source: European Polymer Journal - April 14, 2019 Category: Chemistry Source Type: research

Synthesis and properties of shape memory poly(aryl ether ketone)s
Publication date: Available online 12 April 2019Source: European Polymer JournalAuthor(s): Zhen Zhao, Yiyang Gu, Danming Chao, Xincai LiuAbstractThermally responsive shape memory polymers have received great attention in the fields of biomedicine and aerospace. A new type of thermoplastic shape memory polymer with excellent mechanical and thermal properties was synthesized. A new reactable monomer with flexible alkyl chain was first designed and synthesized, then introducing it into the main chain structure of poly(aryl ether ketone)s. The alternating chain structure of the soft and hard segments and the H-Bonding between ...
Source: European Polymer Journal - April 13, 2019 Category: Chemistry Source Type: research

Gradient supramolecular interactions and tunable mechanics in polychaete jaw inspired semi-interpenetrating networks
Publication date: July 2019Source: European Polymer Journal, Volume 116Author(s): Chase B. Thompson, Sourav Chatterjee, LaShanda T.J. KorleyAbstractPolychaete worms display a remarkable jaw structure, where a gradient in metal-ligand coordination down the length of the jaw results in a shift from hard to soft mechanics. To mimic these gradient structures, a Zn-coordinated supramolecular polymer is crosslinked into a covalent matrix to afford supramolecular semi-interpenetrating networks (SIPNs). These SIPN materials exhibit improved mechanics with a lower supramolecular content (30 wt%), allowing for energy dissipation t...
Source: European Polymer Journal - April 13, 2019 Category: Chemistry Source Type: research

Ordered Orientation and Compact Molecule Packing due to Coplanar Backbone Structure of Interlayer: Improvement in Fill Factor for Photovoltaic Device
Publication date: Available online 11 April 2019Source: European Polymer JournalAuthor(s): Doo Hun Kim, Woong Cheol Seok, Jong Tae Leem, Yong Woon Han, Ju Hui Kang, Ho Jun SongAbstractA novel alcohol/water-soluble small molecule was obtained using a p-type planar backbone. The synthesized molecule was dissolved in organic solvents and highly polar solvents. The 3,3'-(((3,3'''-dimethyl-[2,2':5',2'':5'',2'''-quarterthiophene]-5,5'''-diyl)bis(4,1-phenylene))bis(oxy))bis(N,N-dimethylpropan-1-amine) (QTA) film exhibited a red-shifted spectrum compared with the solution spectrum owing to its many more planar molecular conformati...
Source: European Polymer Journal - April 13, 2019 Category: Chemistry Source Type: research

Facile preparation of functionalized poly(amidoamine)s with biocidal activity on wood substrates
Publication date: Available online 11 April 2019Source: European Polymer JournalAuthor(s): Laura Bergamonti, Claudia Graiff, Matteo Tegoni, Giovanni Predieri, Lisa Elviri, Sabrina Palanti, Cèline Paris, Elisa Cappelletto, Rosa di Maggio, Pier Paolo LotticiAbstractLinear poly(amidoamine)s (PAAs), functionalized in the main chain with hydroxyl and/or siloxane groups, were obtained by single step addition of primary amines (ethanolamine, 3-aminopropyltriethoxysilane) to N,N’-methylenebisacrylamide, in water or low molecular weight alcohols, without catalysts. The polymers were characterized by FTIR, Raman, 1H and...
Source: European Polymer Journal - April 13, 2019 Category: Chemistry Source Type: research

Ring-expansion polymerization (REP) of L-lactide with cyclic tin(II) bisphenoxides
Publication date: Available online 11 April 2019Source: European Polymer JournalAuthor(s): Hans R. Kricheldorf, Steffen M. Weidner, Felix ScheligaAbstractFive new cyclic catalysts were prepared by a new synthetic method from tin(II)-2-ethyhexanoate and silylated catechols, silylated 2,2́dihydroxybiphenyl or silylated 1,1́-bisnaphthol. These catalysts were compared with regard to their usefulness as catalysts for the ring expansion polymerization (REP) of L-lactide in bulk at 160 °C, and with two different tin(IV) derivatives of 1,1́binaphthol. Best results were obtained using seven-membered cyclic tin(II)bisphenoxid...
Source: European Polymer Journal - April 13, 2019 Category: Chemistry Source Type: research

Shape memory polymer networks based on methacrylated fatty acids
In this study, bio-based materials were prepared from fatty acid precursors and variable amounts of styrene or divinylbenzene by free-radical polymerization. The obtained materials were highly translucent and resulted insoluble in common organic and aqueous solvents. They exhibit a complex microstructure due to the formation of highly cross-linked arrangements (micro/nanogels) closed packed into clusters. The bio-polymers prepared with divinylbenzene (a tetra-functional monomer), due to their excessive cross-linkage, resulted in brittle samples whose mechanical response could not be obtained. On the other hand, bio-based p...
Source: European Polymer Journal - April 13, 2019 Category: Chemistry Source Type: research

Preparation of silver nanoparticles using different fractions of TEMPO-oxidized nanocellulose
Publication date: Available online 11 April 2019Source: European Polymer JournalAuthor(s): Dominika Pawcenis, Damian K. Chlebda, Roman J. Jędrzejczyk, Magdalena Leśniak, Maciej Sitarz, Joanna ŁojewskaAbstractThe aim of this study was to examine efficacy of different fractions of TEMPO-oxidized cellulose nanocrystals (TOCNs) as a reducing and capping agent of silver nanoparticles (AgNPs). Silver nanoparticles were prepared by thermal treatment of AgNO3 in aqueous suspensions of TOCN fractions. Three different nanocomposite materials based on different fractions of TOCNs and reduced in situ by TOCN silver nanoparticles we...
Source: European Polymer Journal - April 13, 2019 Category: Chemistry Source Type: research

Cellular morphology evolution in nanocellular poly (lactic acid)/thermoplastic polyurethane blending foams in the presence of supercritical N2
Publication date: Available online 10 April 2019Source: European Polymer JournalAuthor(s): Zhongjie Qu, Dexian Yin, Hongfu Zhou, Xiangdong Wang, Shan ZhaoAbstractCurrently, the formation of nanocells and complex cellular structure (CCS) in semi-crystalline polymer using supercritical fluids as blowing agent had become a big and newly developing challenge worldwide. In this paper, a facile methodology of polymer blending and batch foaming was proposed to fabricate CCS with large cells in micro-size and small cells in nano-size in semi-crystalline poly (lactic acid) (PLA) foams. Thermoplastic polyurethane (TPU) was introduce...
Source: European Polymer Journal - April 11, 2019 Category: Chemistry Source Type: research

Evolution in the morphological behaviour of a series of fluorine-containing ABC miktoarm star terpolymers
Publication date: Available online 10 April 2019Source: European Polymer JournalAuthor(s): Xiaoyun Liu, Yanling Ding, Jing Liu, Shaoliang Lin, Qixin ZhuangAbstractFluorine-containing amphophilic polymers, as well as star polymers, have shown extremely abundant self-assembled morphologies because of microphase separation within the assemblies. Taking advantage of these characteristics, we prepared a series of ABC miktoarm star terpolymers with poly(ethylene glycol) (PEG) as a hydrophilic block, as well as poly(2-ethylhexylmethacrylate) (PEHMA) as a hydrophobic chain. Poly(1H,1H,5H-octafluoropentylmethacrylate) (POFPMA) was ...
Source: European Polymer Journal - April 11, 2019 Category: Chemistry Source Type: research

Improving affinity of β-cyclodextrin-based molecularly imprinted polymer using room temperature ionic liquid
Publication date: Available online 9 April 2019Source: European Polymer JournalAuthor(s): Long Zhao, Xiao-Lin Wang, Li Ma, Ping-Ping Shang, Yan-Ping Huang, Zhao-Sheng LiuAbstractThis paper reported the facile method of improving the affinity of β-cyclodextrins (β-CD)-based molecularly imprinting system by using the effect of interaction of β-CD and room temperature ionic liquids (RTILs). The molecularly imprinting polymers (MIPs) of β-CD matrices were prepared with β-CD, as functional monomer, hexanethylene diisocyante as crosslinker, and using aesculin as a model molecule in a RTIL (1-butyl-3-meth...
Source: European Polymer Journal - April 10, 2019 Category: Chemistry Source Type: research

Effect of graphene-derivatives on the responsivity of PNIPAM-based thermosensitive nanocomposites – A review
Publication date: July 2019Source: European Polymer Journal, Volume 116Author(s): Orsolya Czakkel, Barbara Berke, Krisztina LászlóAbstractIn this review, we provide an overview of graphene-oxide (GO) containing responsive hydrogels. First, the usual preparation strategies are summarised, then an account is given of the effect of structural modifications of GO. Finally, a general overview of the effect on the responsiveness of the hydrogels is given. As the literature on responsive gel nanocomposites is very wide we focus our review on thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) based systems.Graphic...
Source: European Polymer Journal - April 10, 2019 Category: Chemistry Source Type: research

Hard epoxy thermosets obtained via two sequential epoxy-amine condensations
Publication date: Available online 8 April 2019Source: European Polymer JournalAuthor(s): Osman Konuray, Aina García, José M. Morancho, Xavier Fernández-Francos, Àngels Serra, Francesc Ferrando, Montserrat García-Alvarez, Xavier RamisAbstractA new family of dual-curable poly(β-hydroxyamine ether) thermosets based on amine-epoxy formulations has been prepared and characterized. Both curing stages consist in an epoxy-amine polycondensation, each having different reactivity. Whereas the first one is carried out at relatively low temperature using an aliphatic flexible amine, the second ...
Source: European Polymer Journal - April 10, 2019 Category: Chemistry Source Type: research

The preparation of PCL/MSO/SiO2 hierarchical superhydrophobic mats for oil-water separation by one-step method
Publication date: Available online 8 April 2019Source: European Polymer JournalAuthor(s): Guohui Zhang, Panpan Wang, Xiaoxiao Zhang, Chunhui Xiang, Lili LiAbstractHydrophobic polycaprolactone (PCL) membranes with hierarchical structure were fabricated via one-step electrospinning technique. Meanwhile, the addition of the liquid methyl silicone oil (MSO) and hydrophobic silica (SiO2) nanoparticles in the PCL membrane were expected to improve the hydrophobicity of PCL membranes. FE-SEM images showed the microsphere-fiber interlinked hierarchical morphology of PCL/MSO/SiO2 composite fiber. FT-IR confirmed the formation of PCL...
Source: European Polymer Journal - April 10, 2019 Category: Chemistry Source Type: research

Gradient supramolecular interactions and tunable mechanics in polychaete jaw inspired supramolecular semi-interpenetrating networks
Publication date: Available online 8 April 2019Source: European Polymer JournalAuthor(s): Chase B. Thompson, Sourav Chatterjee, LaShanda T.J. KorleyAbstractPolychaete worms display a remarkable jaw structure, where a gradient in metal-ligand coordination down the length of the jaw results in a shift in hard to soft mechanics. To mimic these gradient structures, a Zn-coordinated supramolecular polymer is crosslinked into a covalent matrix to afford supramolecular semi-interpenetrating networks (SIPNs). These SIPN materials exhibit tunable mechanics with a lower supramolecular content (30 wt%), allowing for energy dissipatio...
Source: European Polymer Journal - April 10, 2019 Category: Chemistry Source Type: research

In-situ and ex-situ synthesis of poly-(imidazolium vanillyl)-grafted chitosan/silver nanobiocomposites for safe antibacterial finishing of cotton fabrics
Publication date: Available online 8 April 2019Source: European Polymer JournalAuthor(s): Reda F.M. Elshaarawy, Gelan A. Seif, Mehrez E. El-Naggar, Tahia B. Mostafa, Emtithal A. El-SawiAbstractCurrent work offers two simple synthetic routes for the production of poly-(imidazolium vanillyl)-grafted oligochitosan Schiff bases (PIVCSBs) and their silver nano-biocomposites (NBCs). First, a green in-situ protocol for preparation of silver nanoparticles (AgNPs) using PIVCSBs as a synergetic reductant and capping agent to afford PIVCSBs/Agin NBCs. Contrariwise, in the ex-situ protocol the AgNPs were initially fabricated and then ...
Source: European Polymer Journal - April 10, 2019 Category: Chemistry Source Type: research

Chitosan/poly(2-ethyl-2-oxazoline) films for ocular drug delivery: formulation, miscibility, in vitro and in vivo studies
Publication date: Available online 8 April 2019Source: European Polymer JournalAuthor(s): Guzel K. Abilova, Daulet B. Kaldybekov, Elvira K. Ozhmukhametova, Aisulu Zh. Saimova, Diara S. Kazybayeva, Galiya S. Irmukhametova, Vitaliy V. KhutoryanskiyAbstractPolymeric films were prepared based on chitosan and its blends with poly(2-ethyl-2-oxazoline) by casting from aqueous solutions. These materials were characterised using a number of physicochemical techniques, including Fourier-transform infrared spectroscopy, thermal gravimetric analysis, differential scanning calorimetry, wide angle x-ray diffraction, tensile testing and ...
Source: European Polymer Journal - April 10, 2019 Category: Chemistry Source Type: research

Efficient synthesis of a rod-coil conjugated graft copolymer by combination of thiol-maleimide chemistry and MOF-catalyzed photopolymerization
Publication date: Available online 8 April 2019Source: European Polymer JournalAuthor(s): Hoan Minh Tran, Le-Thu T. Nguyen, Tam Huu Nguyen, Ha Lac Nguyen, Nam T.S. Phan, Geng Zhang, Tsutomu Yokozawa, Hai Le Tran, Phong Thanh Mai, Ha Tran NguyenAbstractWhile several strategies have been developed in the literature to obtain rod-coil graft copolymers composed of regioregular poly(3-hexyl thiophene) (P3HT), our contribution in this field consists of a convenient and versatile way to obtain a copolymer with a coil polymethacrylate backbone grafted with P3HT rod chains by a combination of the thiol-maleimide chemistry and MOF-c...
Source: European Polymer Journal - April 10, 2019 Category: Chemistry Source Type: research

Aromatic polyesters containing pendant azido groups: synthesis, characterization, chemical modification and thermal cross-linking
Publication date: Available online 9 April 2019Source: European Polymer JournalAuthor(s): Samadhan S. Nagane, Savita Verma, Bhausaheb V. Tawade, Prakash S. Sane, Sushilkumar A. Dhanmane, Prakash P. WadgaonkarAbstractA partially bio-based bisphenol containing pendant azido group viz., 4, 4’-(5-azidopentane-2, 2-diyl) diphenol (AZBPA) was synthesized starting from 4, 4’-bis (4-hydroxyphenyl) pentanoic acid. AZBPA was reacted with isophthaloyl chloride (IPC), terephthaloyl chloride (TPC) and a mixture of IPC/TPC (50:50 mol %) by phase transfer-catalyzed interfacial polycondensation route to obtain aromatic polyest...
Source: European Polymer Journal - April 10, 2019 Category: Chemistry Source Type: research

Development of a biobased superabsorbent polymer from recycled cellulose for diapers applications
Publication date: July 2019Source: European Polymer Journal, Volume 116Author(s): Clément Lacoste, José-Marie Lopez-Cuesta, Anne BergeretGraphical abstract (Source: European Polymer Journal)
Source: European Polymer Journal - April 8, 2019 Category: Chemistry Source Type: research

Synthesis of lauryl methacrylate and poly(ethylene glycol) methyl ether methacrylate copolymers with tunable microstructure and emulsifying properties
Publication date: Available online 6 April 2019Source: European Polymer JournalAuthor(s): Agustín Iborra, Lucas Salvatierra, Juan M. Giussi, Omar AzzaroniAbstractIn this work we study the synthesis and properties of copolymers constituted of lauryl methacrylate and poly(ethylene glycol) methyl ether methacrylate monomers, prepared by atom transfer radical copolymerization in the entire composition range (with low and high monomer conversion). We propose a description of the copolymer microstructure, and evaluate the composition drift effect in the thermal and solution properties of the obtained copolymers. Nuclear m...
Source: European Polymer Journal - April 6, 2019 Category: Chemistry Source Type: research

Antibacterial Surface Based on New Epoxy-Amine Networks From Ionic Liquid Monomers
Publication date: Available online 4 April 2019Source: European Polymer JournalAuthor(s): Sébastien Livi, Luanda C. Lins, Larissa.B. Capeletti, Charline Chardin, Nour Halawani, Jérôme Baudoux, Mateus.B. CardosoAbstractThe design of new highly effective polymer materials as active surfaces or coatings against microorganisms such as Escherichia coli (E. coli) is a major challenge for public health. In the present work, novel imidazolium ionic liquid monomers (ILMs) having a similar structure of conventional Bisphenol A diglycidyl ether epoxy prepolymer (DGEBA) have been designed without requiring to the u...
Source: European Polymer Journal - April 5, 2019 Category: Chemistry Source Type: research

Homogeneous, Monodispersed Furan-Melamine Particles Performing Reversible Binding and Forming Networks
Publication date: Available online 4 April 2019Source: European Polymer JournalAuthor(s): Katharina Urdl, Stephanie Weiss, Björn Brodbeck, Andreas Kandelbauer, Edith Zikulnig-Rusch, Uwe Müller, Wolfgang KernAbstractHomogeneous and monodispersed furan-functionalised melamine-formaldehyde particles were produced. As a precursor, 2-chloro-1,3,5-triazine-2,4-diamine (Mel) was selectively substituted with 2-aminomethyl furan (Fu) units in a convenient one step reaction. The pure reaction product Fu-Mel, which was used without further purification, was reacted with formaldehyde by conventional sol-gel condensation in a...
Source: European Polymer Journal - April 5, 2019 Category: Chemistry Source Type: research

Marine-Inspired Polymers in Medical Adhesion
Publication date: Available online 4 April 2019Source: European Polymer JournalAuthor(s): Diederik W.R. Balkenende, Sally M. Winkler, Phillip B. MessersmithAbstractMedical adhesives that are strong, easy to apply and biocompatible are promising alternatives to sutures and staples in a large variety of surgical and clinical procedures. Despite progress in the development and regulatory approval of adhesives for use in the clinic, adhesion to wet tissue remains challenging. Marine organisms have evolved a diverse set of highly effective wet adhesive approaches that have inspired the design of new medical adhesives. Here we p...
Source: European Polymer Journal - April 5, 2019 Category: Chemistry Source Type: research

Synthesis and properties of diblock copolymers of ω-pentadecalactone and α-amino acids
Publication date: Available online 4 April 2019Source: European Polymer JournalAuthor(s): Ernesto Tinajero-Díaz, Antxon Martínez-de Ilarduya, Sebastián Muñoz-GuerraAbstractDiblock copolymers (PPDLx-b-pPAAy) were prepared from ω-pentadecalactone and L-glutamic acid or L-lysine amino acids by ring opening polymerization initiated by amino groups. Telechelic amino-ended poly(ω-pentadecalactone) with a length of 15-20 repeating units was firstly synthesized by enzymatic polymerization by means of CALB and then used as macroinitiator for the polymerization of the N-carboxyanhydrides of th...
Source: European Polymer Journal - April 5, 2019 Category: Chemistry Source Type: research

Poly(styryl bisphosphonate) Nanoparticles with a Narrow Size Distribution: Synthesis, Characterization and Antibacterial Applications
Publication date: Available online 4 April 2019Source: European Polymer JournalAuthor(s): Hanna P. Steinmetz, Safra Rudnick-Glick, Michal Natan, Ehud Banin, Shlomo MargelAbstractBacterial resistance to antibiotics is a major challenge in health research. A recent approach to combat this resistance is by interfering with vital bacterial functional systems. Calcium ions play an important role in bacterial functions such as bacterial cell stability, regulation of virulence genes, and in the function of various intracellular proteins. Bisphosphonate compounds have a high affinity for calcium ions and the antibacterial activity...
Source: European Polymer Journal - April 5, 2019 Category: Chemistry Source Type: research

Effect of graphene-derivatives on the responsivity of PNIPAM-based thermosensitive nanocomposites - A review
Publication date: Available online 5 April 2019Source: European Polymer JournalAuthor(s): Czakkel, Barbara Berke, Krisztina LászlóAbstractIn this review, we provide an overview of graphene-oxide (GO) containing responsive hydrogels. First, the usual preparation strategies are summarised, then an account is given of the effect of structural modifications of GO. Finally, a general overview of the effect on the responsiveness of the hydrogels is given. As the literature on responsive gel nanocomposites is very wide we focus our review on thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) based systems.Graphic...
Source: European Polymer Journal - April 5, 2019 Category: Chemistry Source Type: research

Renewable and Flexible UV-blocking Film from poly(butylene succinate) and lignin
Publication date: Available online 2 April 2019Source: European Polymer JournalAuthor(s): Yan Zhang, Shumin Zhou, Xiangchen Fang, Xin Zhou, Jingya Wang, Fudong Bai, Shaozhong PengAbstractHerein, a renewable and flexible UV-shielding biocomposite film was obtained by poly(butylene succinate) (PBS) and lignin. A strategy of reactive interfacial compatibilization was developed in order to improve the miscibility of lignin with PBS. Firstly, lignin was modified by maleic anhydride, and then the reactive plasticizer triethy citrate (TEC) was employed as a bridge to reinforce the interaction of lignin with PBS. The elongation at...
Source: European Polymer Journal - April 4, 2019 Category: Chemistry Source Type: research

Supramolecularly Toughened and Elastic Epoxy Resins by Grafting 2-Ureido-4[1H]-pyrimidone Moieties on the Side Chain
In this study, 2-ureido-4[1H]-pyrimidone (UPy) compounds were synthesized and chemically grafted onto the side chain of epoxy resins. The UPy-modified epoxy resin demonstrated substantial improvements in toughness and elasticity compared with unmodified epoxy resin as proven by a tensile test and distortion test. The breaking elongation of the UPy-modified epoxy resin was 5 times higher than that of unmodified epoxy resin under a tensile test. In addition, the fracture mechanism of the modified epoxy resin matched with the ductile fracture rather than the brittle fracture of unmodified epoxy resins. The introduction of qua...
Source: European Polymer Journal - April 2, 2019 Category: Chemistry Source Type: research

Synthesis of Thiol-terminated PEG-functionalized POSS Cross-linkers and Fabrication of High-Strength and Hydrolytic Degradable Hybrid Hydrogels in Aqueous Phase
Publication date: Available online 1 April 2019Source: European Polymer JournalAuthor(s): Heling Li, Jinchi Dai, Qi Xu, Cuifen Lu, Guichun Yang, Feiyi Wang, Junqi Nie, Xingjian Hu, Nianguo Dong, Jiawei ShiAbstractA series of high-strength and hydrolytic degradable POSS-PEG hybrid hydrogels were successfully fabricated by Michael addition reaction of 4-arm-PEG-maleimide with thiol-terminated PEG-functionalized POSS cross-linkers in aqueous phase. The cross-linkers, which are hydrophilic, multifunctional and contain esters, were prepared by linking hydrophilic PEG with different chain length onto hydrophobic POSS and termina...
Source: European Polymer Journal - April 2, 2019 Category: Chemistry Source Type: research

Mechanism of interaction of aminocoumarins with reaction medium during cationic photopolymerization of triethylene glycol divinyl ether
Publication date: Available online 1 April 2019Source: European Polymer JournalAuthor(s): Joanna Ortyl, Monika Topa, Iwona Kamińska-Borek, Roman PopielarzAbstractApplicability of a series of coumarin derivatives as fluorescent probes for monitoring progress of cationic photopolymerization processes by Fluorescence Probe Technique (FPT) has been studied using triethylene glycol divinyl ether as a model monomer and diphenyliodonium hexafluorophospate as a cationic photoinitiator. The following coumarins were evaluated: Coumarin 1, Coumarin 6H, Coumarin 102, Coumarin 120, Coumarin 151, Coumarin 343 and Coumarin 466. It has b...
Source: European Polymer Journal - April 2, 2019 Category: Chemistry Source Type: research

Preparation and performance of a novel multi-mode COF-300@SiO2 chromatographic stationary phase
Publication date: Available online 2 April 2019Source: European Polymer JournalAuthor(s): Lixiao Chen, Jie Gao, Qi Wu, Hui Li, Shuqing Dong, Xiaofeng Shi, Liang ZhaoAbstractA novel multimode COF-300@SiO2 chromatographic stationary phase was successfully prepared via an in situ growth strategy. Powder X-ray diffraction, solid nuclear magnetic resonance and scanning electron microscope confirmed the successful preparation of COF-300@SiO2 chromatographic stationary phase. Multimode chromatographic performance and multiple retention mechanisms were investigated. Neutral and polar compounds were efficiently separated in reverse...
Source: European Polymer Journal - April 2, 2019 Category: Chemistry Source Type: research

Synthesis, mechanical properties and biodegradation of various acrylic acid-grafted poly(butylene succinate-co-terephthalate)/organically modified layered zinc phenylphosphonate nanocomposites
Publication date: Available online 2 April 2019Source: European Polymer JournalAuthor(s): Sheng-Hsiang Lin, Jie-Mao Wang, Hsiang-Ting Wang, Tzong-Ming WuAbstractA new series of biodegradable aliphatic-aromatic nanocomposites containing various acrylic acid-grafted poly(butylene succinate-co-terephthalate) (PBST) and organically modified layered zinc phenylphosphonate (m-PPZn) were successfully synthesized through the transesterification and polycondensation having the covalent linkages between polymer and inorganic materials. Fourier transform infrared (FTIR) and 13C-nuclear magnetic resonance (NMR) spectra demonstrate the...
Source: European Polymer Journal - April 2, 2019 Category: Chemistry Source Type: research

Biodegradable core-shell electrospun nanofibers based on PLA and γ-PGA for wound healing
In this study, nanofibers with Poly(γ-glutamic acid) (γ-PGA) as the core and Polylactic acid (PLA) as the shell materials were prepared via coaxial electrospinning. The effect of flow rate on the structure and diameter of the core-shell nanofibers was investigated. The microstructure and morphology of the core-shell nanofibers were observed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). In laser scanning confocal microscopy experiments (LSCM), core-shell nanofibers loaded with rhodamine and coumarin-6 were excited with red and green light respectively to further investigate th...
Source: European Polymer Journal - April 2, 2019 Category: Chemistry Source Type: research

Development of a biobased superabsorbant polymer from recycled cellulose for diapers applications
Publication date: Available online 29 March 2019Source: European Polymer JournalAuthor(s): Clément Lacoste, José-Marie Lopez-Cuesta, Anne BergeretGraphical abstract (Source: European Polymer Journal)
Source: European Polymer Journal - March 30, 2019 Category: Chemistry Source Type: research

Porous aromatic polyamides the easy and green way
Publication date: Available online 30 March 2019Source: European Polymer JournalAuthor(s): Blanca S. Pascual, Miriam Trigo-López, José A. Reglero Ruiz, Jesús L. Pablos, Juan C. Bertolín, César Represa, José V. Cuevas, Félix C. García, José M. GarcíaAbstractWe prepared microporous aramid films through a simple, inexpensive and green way, using ionic liquids (IL) as porosity promoters. Commercial poly(m-phenylene isophthalamide) (MPIA) films with different IL proportions were prepared, and then microporous films were obtained by removing the IL in distille...
Source: European Polymer Journal - March 30, 2019 Category: Chemistry Source Type: research

Renewable and Super-toughened Poly (butylene succinate) with Bio-based Elastomers: Preparation, Compatibility and Performances
Publication date: Available online 28 March 2019Source: European Polymer JournalAuthor(s): Xiaoran Hu, Yan Li, Yu Gao, Runguo Wang, Zhao Wang, Hailan Kang, Liqun ZhangAbstractPoly (butylene succinate) (PBS) is one of the most mature Bio-based plastics in the current market. However, its excellent mechanical properties are disappointed eclipsed by its inherent poor toughness. Herein, a novel bio-based elastomer poly (2,3-butanediol-co-1,4-butanediol-co-succinate) (PBBS) was designed and synthesized from three bio-based monomers in order to improve the toughness of PBS. Butanedio and succinic acid were used to ensure a good ...
Source: European Polymer Journal - March 29, 2019 Category: Chemistry Source Type: research

Novel Aluminum Complexes Bearing 2-(Aminomethylene)malonate Ligands with High Efficiency and Controllability in Ring-Opening Polymerization of ε-Caprolactone
Publication date: Available online 28 March 2019Source: European Polymer JournalAuthor(s): Chi-Chi Chang, Yung-Chi Chang, Wei-Yi Lu, Yi-Chun Lai, Kuo-Hui Wu, Ya-Fan Lin, Hsuan-Ying ChenAbstractA series of Al complexes bearing diethyl 2-((arylamino)methylene)malonate and diethyl 2-((alkylamino)methylene)malonate ligands (AMM ligands) were synthesized and their application in the ring-opening polymerization of ε-caprolactone was studied. All the Al complexes bearing AMM ligands exhibited higher catalytic activity (approximately 2.8–16.5 fold) than those Al complexes bearing ketiminate ligands did, except OiPrAl...
Source: European Polymer Journal - March 29, 2019 Category: Chemistry Source Type: research

Dependence of operational parameters of laccase-based biosensors on structure of photocross-linked polymers as holding matrixes
Publication date: Available online 28 March 2019Source: European Polymer JournalAuthor(s): Taras Kavetskyy, Oleh Smutok, Olha Demkiv, Sigita Kasetaite, Jolita Ostrauskaite, Helena Švajdlenková, Ondrej Šauša, Khrystyna Zubrytska, Nataliia Hoivanovych, Mykhailo GoncharAbstractLaccase-based amperometric enzyme biosensors of the third generation for analysis of phenol derivates have been constructed using graphite rods (type RW001) as working electrodes and the photocross-linked polymers as a matrix. Such matrix consisted of epoxidized linseed oil (ELO), bisphenol A diglycidyl ether (RD) as reactive...
Source: European Polymer Journal - March 29, 2019 Category: Chemistry Source Type: research

Promising anti-amyloid behavior of cationic pyridylphenylene dendrimers: role of structural features and mechanism of action
Publication date: Available online 27 March 2019Source: European Polymer JournalAuthor(s): Svetlana A. Sorokina, Yulia Yu. Stroylova, Sofia A. Tishina, Zinaida B. Shifrina, Vladimir I. MuronetzAbstractMisfolding and aggregation of amyloidogenic proteins are responsible for the onset of neurodegenerative diseases. This makes studies directed towards prevention of these processes of particular importance. In this paper we report that cationic pyridylphenylene dendrimers of the second (G2), third (G3) and fourth (G4) generations act as effective suppressors of the amyloid aggregation of the full-length ovine prion protein (Pr...
Source: European Polymer Journal - March 28, 2019 Category: Chemistry Source Type: research

Catalysis of isocyanate reaction with water by DMF and its use for fast preparation of uniform polyurea microspheres through precipitation polymerization
Publication date: Available online 27 March 2019Source: European Polymer JournalAuthor(s): Youyan Wei, Xubao Jiang, Shusheng Li, Xiang Zheng KongAbstractHighly uniform polymer microspheres are widely used for a variety of applications. Uniform polyurea (PU) microspheres have been prepared by precipitation polymerization of isophorone diisocyanate (IPDI) in a binary mixture of H2O-acetone (AT). With AT replaced by N,N′-dimethylformamide (DMF) in the binary mixture, a significant acceleration effect is observed. Through measurements of the solubility of IPDI and its polymer in the binary solvents of different compositi...
Source: European Polymer Journal - March 28, 2019 Category: Chemistry Source Type: research

α,ω-Di(vinylene carbonate) telechelic polyolefins: Synthesis by metathesis reactions and studies as potential precursors toward hydroxy-oxazolidone-based polyolefin NIPUs
Publication date: Available online 26 March 2019Source: European Polymer JournalAuthor(s): Cyril Chauveau, Stéphane Fouquay, Guillaume Michaud, Frédéric Simon, Jean-François Carpentier, Sophie M. GuillaumeAbstractCurrent polyurethane (PU) industrial and academic research aims at developing non-isocyanate PUs, referred to as NIPUs. Within this context, we report herein the synthesis of original vinylene carbonate (VC) compounds, subsequently used as chain-transfer agents (CTAs) towards the preparation of α,ω-di(VC) telechelic (co)polyolefins from the tandem ring-opening metathesis pol...
Source: European Polymer Journal - March 27, 2019 Category: Chemistry Source Type: research

Single Component Pluronic F127-Lipoic Acid Hydrogels with Self-healing and Multi-responsive Properties
This study thus provided a very promising route for the preparation of multifunctional hydrogels.Graphical abstract (Source: European Polymer Journal)
Source: European Polymer Journal - March 27, 2019 Category: Chemistry Source Type: research

In Vitro Evaluation of Synergistic Effect of Primary and Tertiary Amino Groups in Chitosan used as a Non-Viral Gene Carrier System
Publication date: Available online 25 March 2019Source: European Polymer JournalAuthor(s): Mehmet Koray GökAbstractThe aim of this study is to investigate the synergistic effect of primary and tertiary amino groups of chitosan (Chi) molecule on the transfection efficiency of human embryonic kidney 293 (HEK293) cells. A non-viral gene carrier system was created by synthesizing a modified Chi with a tertiary amino group grafted to its methylol group (-CH2OH) (Chi-tAm). The molecule was synthesized using 3-dimethylamino-1-propyl chloride hydrochloride (DAPC) and characterized using Fourier transform infrared spectroscopy...
Source: European Polymer Journal - March 27, 2019 Category: Chemistry Source Type: research