Thermal decomposition of poly(ethylene terephthalate)/mesoporous molecular sieve composites
Thermal decomposition of poly(ethylene terephthalate)/mesoporous molecular sieve composites
RUN Mingtao1, ZHANG Dayu2, WU Sizhu2, WU Gang2
1.Key Lab of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, China; College of Chemistry & Environmental Science, Hebei University, Baoding 071002, China; 2.Key Lab of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, China;
Abstract：The nonisothermal and isothermal degradation processes of poly (ethylene terephthalate)/mesoporous molecular sieve (PET/MMS) composites synthesized by in-situ polymerization were studied by using thermogravimetric analysis in nitrogen. The nonisothermal degradation of the composite is found to be the first-order reaction. An iso-conversional procedure developed by Ozawa is used to calculate the apparent activation energy (E), which is an average value of about 260 kJ/mol with the weight conversion from 0% to 30%, and is higher than that of neat PET. Isothermal degradation results are confirmed with the nonisothermal process, in which PET/MMS showed higher thermal stability than neat PET. The polymer in mesoporous channels has more stability due to the protection of the inorganic pore-wall. These results indicate that mesoporous MMS in PET/MMS composites improve the stability of the polymer.
出版日期: 2007-03-05
引用本文:
. Thermal decomposition of poly(ethylene terephthalate)/mesoporous molecular sieve composites[J]. Frontiers of Chemical Engineering in China, 2007, 1(1): 50-54.
RUN Mingtao, ZHANG Dayu, WU Sizhu, WU Gang. Thermal decomposition of poly(ethylene terephthalate)/mesoporous molecular sieve composites. Front. Chem. Sci. Eng., 2007, 1(1): 50-54.
