光固化聚甲基丙烯酰氧丙基笼型倍半硅氧烷热分解动力学  

Thermal degradation kinetics of UV-curing poly(methylacyloxylpropyl-POSS)

作　　者：孙贝贝[1] 高俊刚[1] 李星[1] 

机构地区：[1]河北大学化学与环境科学学院,河北保定071002

出　　处：《功能材料》2010年第A02期375-378,共4页Journal of Functional Materials

基　　金：河北省自然科学基金资助项目(E2007000204)

摘　　要：用热重及热-质联用测定紫外光固化后的甲基丙烯酰氧丙基笼型倍半硅氧烷(MPA-POSS)的热分解过程,采用Ozawa法、Kissinger-Akahira-Sunose(KAS)法和Friedman法对其热降解动力学进行分析。样品的分解过程主要分为两个阶段,初期主要是羰基和C—O键的断裂,在347～677℃范围内产生CO和CO2,在445～655℃范围内产生CH3+。分解活化能在119.88～133.72kJ/mol之间,反应级数为n=0.852。Degradation process of poly（methylacyloxylpropyl-POSS）which was cured by UV-radiation was investigated by thermogravimetric analysis and thermogravimetric-mass spectra.The thermal degradation kinetics was studied by Ozawa,Kissinger-Akahira-Sunose（KAS）and Friedman methods.The results indicated that the degradation process can be divided into two stages.The carbonyl group and ether bond were decomposed and produced CO or CO2 at 360-677℃,the CH3^＋ was produced at 445-655℃.The thermal decomposing activation energy is between 119.88 and 133.72kJ/mol and was found to be increased at first and then decreased.The thermal degradation reaction order is 0.852.

关 键 词：无机-有机杂化材料 笼型倍半硅氧烷 热分析 降解动力学 

分 类 号：O653.52[理学—分析化学]