Study on novel flame retarded LDH-TDI-HEA-VTES-acrylate composites and their flame retardant mechanism

Publication date: Available online 16 October 2019Source: Reactive and Functional PolymersAuthor(s): Xia Wang, Qihui Chen, Yangqing Zheng, Maochun Hong, Heqing FuAbstractFirst, Layered double hydroxide (LDH) was modified by toluene diisocyanate (TDI), 2-hydroxyethyl acrylate (HEA), and LDH-TDI-HEA was prepared. Then LDH-TDI-HEA was modified by vinyl triethoxysilane (VTES), and LDH-TDI-HEA-VTES composites were obtained. Finally, acrylate was modified by LDH-TDI-HEA-VTES, and flame retarded LDH-TDI-HEA-VTES-Acrylate composites were successfully synthesized by in situ polymerization. The structures of LDH, LDH-TDI-HEA, LDH-TDI-HEA-VTES and LDH-TDI-HEA-VTES-Acrylate composites were characterized by Fourier transform infrared spectra, X-ray diffraction, X-ray photoelectron spectroscopy and Scanning electron microscopic. The effect of LDH-TDI-HEA-VTES content on the thermal stability, mechanical properties, adhesion properties and flame retardant properties of LDH-TDI-HEA-VTES-Acrylate composites was studied. At the same time, the thermal stability, mechanical properties, adhesion properties and flame retardant properties of LDH-Acrylate composites and LDH-TDI-HEA-VTES-Acrylate composites were also studied. The experimental results showed that with the increasing of LDH-TDI-HEA-VTES content, the thermal stability, mechanical properties, flame retardant properties, and shear resistance of LDH-TDI-HEA-VTES-Acrylate composites were improved, while the tack and 180° peel strength d...
Source: Reactive and Functional Polymers - Category: Chemistry Source Type: research

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CONCLUSIONS: This is the largest cohort reported in the literature of patients with frostbite injuries treated with HBOT. Hyperbaric oxygen therapy may show positive impact on the demarcation level of frostbite and, despite the common side effects, it generally causes no long-term sequelae. PMID: 31730511 [PubMed - as supplied by publisher]
Source: Wounds - Category: General Medicine Tags: Wounds Source Type: research
Publication date: Available online 18 November 2019Source: Materials Chemistry and PhysicsAuthor(s): J.N. Lacerda, D.F. Franceschini, E.A. Ponzio, Laura M. Esteves, R.B. Guimarães, Y.T. XingAbstractManganese oxide nanofoam has been prepared by pulsed laser deposition, from a metallic Mn target in a 5 Torr pressure O2 buffer atmosphere. The as-prepared samples were heat-treated at different temperatures (300 °C - 500 °C) in air. Both as-deposited and heat-treated samples have a high porosity foam-like morphology, as shown by Field Emission Scanning Electron Microscopy. High Resolution Transmission Electron Mi...
Source: Materials Chemistry and Physics - Category: Materials Science Source Type: research
Publication date: 1 February 2020Source: Materials Chemistry and Physics, Volume 241Author(s): Mengya Sun, Jie Ma, Manman Zhang, Yao Xiao, Yuanzheng Zhu, Shuping ZhangAbstractHerein, a novel thiourea modified Fe3O4/graphene oxide magnetic nanocomposite (TMGO) is first constructed for absorbing a dye named Coomassie brilliant blue (CBB) from aqueous solutions. The as-prepared adsorbent is characterized by an X-ray powder diffractometer (XRD), A Fourier transform infrared spectrometer (FTIR), a vibrating sample magnetometer (VMS), a field emission scanning electron microscopy (SEM), a scan transmission electron microscopy (S...
Source: Materials Chemistry and Physics - Category: Materials Science Source Type: research
Publication date: Available online 17 November 2019Source: Journal of Materials Science &TechnologyAuthor(s): Lin Lu, Qianqian LiuAbstractThis work aimed to study the comprehensive effects of photo-oxidation and biodegradation on different failure stages of polyester coatings, which were exposed to the tropical rainforest atmosphere. The surface morphology, aging products, local aging characteristics and electrochemical behavior of the coatings were characterized with scanning electron microscope (SEM), fourier transform infrared spectroscopy (FTIR), electrochemical impedance spectroscopy (EIS) and high-resolution disp...
Source: Journal of Materials Science and Technology - Category: Materials Science Source Type: research
In this study, a corrosion-resistant polymer coating with self-cleaning properties on Mg alloy AZ31 was successfully fabricated via a pretreatment of amino-silane (poly(3-aminopropyl)trimethoxysilane, PAPTMS) and subsequently covered with a polypropylene (PP) film. Surface morphology and chemical compositions were examined using field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), and Fourier transform infrared spectrophotometry (FT-IR) and X-ray photoelectron spectroscopy (XPS) as well. Contact angle was measured to determine hydrophobicity of the composite coatings. Water permeability of the coa...
Source: Journal of Materials Science and Technology - Category: Materials Science Source Type: research
Publication date: Available online 17 November 2019Source: Journal of Materials Science &TechnologyAuthor(s): Edson Cezar Grzebielucka, João Frederico Haas Leandro Monteiro, Eder Carlos Ferreira de Souza, Christiane Philippini Ferreira Borges, André Vitor Chaves de Andrade, Eloísa Cordoncillo, Héctor Beltrán-Mir, Sandra Regina Masetto AntunesAbstractThe effect of chromium addition on the structure and electrical properties of CaCu3Ti4O12 is studied. Compositions based on the formula CaCu3Ti4-xCrxO12-δ (x = 0, 0.025, 0.050 and 0.075 mol%) are prepared by soli...
Source: Journal of Materials Science and Technology - Category: Materials Science Source Type: research
Publication date: Available online 18 November 2019Source: NeuroImageAuthor(s): Rongtao Jiang, Nianming Zuo, Judith M. Ford, Shile Qi, Dongmei Zhi, Chuanjun Zhuo, Yong Xu, Zening Fu, Juan Bustillo, Jessica A. Turner, Vince D. Calhoun, Jing SuiAbstractAlthough both resting and task-induced functional connectivity (FC) have been used to characterize the human brain and cognitive abilities, the potential of task-induced FCs in individualized prediction for out-of-scanner cognitive traits remains largely unexplored. A recent study Greene et al. (2018) predicted the fluid intelligence scores using FCs derived from rest and mult...
Source: NeuroImage - Category: Neuroscience Source Type: research
The incidence of cryptosporidiosis in Scandinavia has increased dramatically in recent years.  As shown in the following chart, rates in Sweden per 100,000 population are approximately twice those reported in the United States – and almost four-fold those reported in the European Region as a whole.  [1-3] References: Gideon e-Gideon multi-graph tool,   https://www.gideononline.com/cases/multi-graphs/ Berger S. Infectious Diseases of Sweden, 2019. 416 pages , 143 graphs , 1,146 references. Gideon e-books,  https://www.gideononline.com/ebooks/country/infectious-diseases-of-sweden/ Berger S. C...
Source: GIDEON blog - Category: Databases & Libraries Authors: Tags: Ebooks Epidemiology General Graphs ProMED Source Type: blogs
Abstract Neuroimaging is an invaluable diagnostic tool for sorting through the vast array of etiologies that underlie altered mental status (AMS). Head computed tomography (CT) without contrast is the primary modality for evaluation of AMS and should be complemented by MR imaging in cases of negative CT but high clinical concern. Studies to maximize brain imaging efficiency and improve the yield of positive scans through the utilization of clinical and laboratory pre-scan diagnostics are ongoing. However, imaging remains the gold standard due to its rapidity with which certain diagnoses can be made or excluded. ...
Source: Radiologic Clinics of North America - Category: Radiology Authors: Tags: Radiol Clin North Am Source Type: research
Publication date: Available online 17 November 2019Source: Polymer TestingAuthor(s): Guoqi Yuan, Yanan Jia, Yuxiang Pan, Weiwei Li, Cong Wang, Leilei Xu, Chunli Wang, Haixia ChenAbstractShrimp shell wastes protein (SSWP) mixed with chitosan (C) were used as the sources of biopolymers to prepare active films, and different concentrations (1, 3 and 5% w/w) of oolong tea extracts (OTE), corn silk extracts (CSE) and black soybean seed coat extracts (BSSCE) were added as active compound. The physicochemical properties of films, as observed by scanning electron microscopic (SEM), differential scanning calorimeter (DSC), fourier ...
Source: Polymer Testing - Category: Chemistry Source Type: research
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