A preliminary study on the physicochemical properties of pigmented Sty/nBA/MMA emulsion films: The effect of thermal ageing

Publication date: Available online 3 November 2018Source: Polymer Degradation and StabilityAuthor(s): T. Fardi, E. Kampasakali, Z. Terzopoulou, V. Pintus, E. Pavlidou, M. Schreiner, D. Bikiaris, G. KyriacouAbstractThe effect of temperature and humidity on the physicochemical and mechanical properties of pigmented Sty/nBA/MMA emulsion polymers containing synthetic organic pigments was studied. Thin films of artist's commercial paints from Liquitex (U.S.A.) and Rembrandt (NL) containing Azo yellow (PY3), diketopyrrolopyrrole red (PR264), phthalocyanine blue (PB15) and phthalocyanine green (PG7) were naturally dried and subjected to moderate artificial ageing at 60 °C and 55% RH and artificial soiling, to simulate thermally aged paints exposed to heat, humidity and dirt deposition. The changes in the paints' surface morphology were studied by Optical Microscopy (OM), Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM). Pyrolysis-Gas Chromatography/Mass Spectrometry (Py-GC/MS), Fourier Transform Infrared Spectroscopy in ATR mode (FTIR-ATR) and Differential Scanning Calorimetry (DSC) were used for their physicochemical characterization. In addition, mechanical testing was performed to investigate variations of the tensile properties. The study allowed the detection of deterioration patterns and defects, which include micro wrinkling and roughening of the surface due to the exposure of the inorganic fillers. Additionally, the extent of soil particles' penetratio...

Source: Polymer Degradation and Stability - November 4, 2018 Category: Chemistry Source Type: research