The Thermal Decomposition Kinetics of Polysiloxane /Polymethylacrylate IPNs Materials  

作　　者：黄志雄 

机构地区：[1]School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2006年第2期47-49,共3页武汉理工大学学报（材料科学英文版）

基　　金：FundedbytheNationalNaturalScienceFoundationofChina(No.50473013)

摘　　要：Polydimethylsiloxane/ polymethylacrylate （ PDMS/ PMA ） interpenetratrating polymer networks （IPNs） was fabricated by simultaneous synthesis and characterized by thermogravimetry （ TG ）. The kinetics of the thermal decomposition of polysiloxane/ polymethylacrylate IPNs in N2 and air was studied at different heating rates. It was observed that there were two decomposition peaks both in N2 and air, which showed that thermal decomposition process obeyed two-step pyrolysis mechanism and accorded with the two compositions of IPN. Kinetic parameters were determined during simultaneous integration of the Doyle equation and the IPN/ s kinetics equation was one-order equation in N2 and Air. The decomposition activation energy in N2 and air were 147. 405 kJ· monl^-1 and 192.656 kJ·monl^-1 respectively.Polydimethylsiloxane/ polymethylacrylate （ PDMS/ PMA ） interpenetratrating polymer networks （IPNs） was fabricated by simultaneous synthesis and characterized by thermogravimetry （ TG ）. The kinetics of the thermal decomposition of polysiloxane/ polymethylacrylate IPNs in N2 and air was studied at different heating rates. It was observed that there were two decomposition peaks both in N2 and air, which showed that thermal decomposition process obeyed two-step pyrolysis mechanism and accorded with the two compositions of IPN. Kinetic parameters were determined during simultaneous integration of the Doyle equation and the IPN/ s kinetics equation was one-order equation in N2 and Air. The decomposition activation energy in N2 and air were 147. 405 kJ· monl^-1 and 192.656 kJ·monl^-1 respectively.

关 键 词：POLYSILOXANE polymethylacrylate IPNS thermogravimetery KINETICS 

分 类 号：O631.3[理学—高分子化学]