화학공학소재연구정보센터
Thermochimica Acta, Vol.573, 32-38, 2013
Thermal degradation behaviors of polydimethylsiloxane-graft-poly(methyl methacrylate)
Polydimethylsiloxane-graft-poly(methyl methacrylate) (PDMS-g-PMMA) was synthesized by emulsion polymerization. Thermal degradation behaviors of PDMS-g-PMMA were studied by using thermogravimetric analysis-Fourier transform infrared spectroscopy (TGA-FTIR) and pyrolysis-gas chromatography-mass spectrometry (PY-GC-MS). It was found that a two-stage degradation happened due to PMMA graft chain and PDMS main chain, respectively, and the grafting ratio of PMMA can be calculated through the first-stage weight loss. The 5% weight loss temperature (T-5%) of PDMS-g-PMMA increased with increasing PDMS contents. The apparent activation energy (E-a) of thermal degradation was evaluated by Kissinger-Akahira-Sunose method and the average value of E of PMMA chain in PDMS-g-PMMA was larger than that of pure PMMA. (C) 2013 Elsevier B.V. All rights reserved.