苯并噁嗪-酚醛-环氧豆油三元聚合体系的热分解行为研究  

Thermal Decomposition Kinetics of Benzoxazine-Phenolic-Epoxidized Soybean Oil Copolymers

作　　者：徐丽[1] 崔铁兵[2] 雒廷亮[1] 刘国际[1] 

机构地区：[1]郑州大学化工与能源学院,郑州450001 [2]中原工学院材料与化工学院,郑州450007

出　　处：《材料导报》2012年第22期67-70,共4页Materials Reports

基　　金：河南省教育厅自然科学基金(2011A530008)

摘　　要：通过热重分析法研究了苯并噁嗪-酚醛-环氧豆油(BA-NP-ESO)三元聚合体系在不同升温速率下的热分解动力学。利用Kissinger-Akahira-Sunose(KAS)法和Flynn-Wall-Ozawa(FWO)法求取了三元聚合体系热分解过程的表观活化能,当分解率在0.3～0.9范围内时,反应属于同一机理,两种方法求得的活化能分别为241.1kJ/mol和253.7kJ/mol。运用Coats-Redfern法和Achar法对非等温动力学数据进行分析,得到热分解反应的机理函数,其热分解反应为四级反应,符合随机成核和随后生长机理,两种方法求得的表观活化能分别为250.21kJ/mol和266.96kJ/mol,与KAS和FWO法的结果较为一致。Thermal decomposition kinetics of the benzoxazine-phenolic-epoxidized soybean oil copolyrners at di- fferent heating rates was investigated using thermogravimetric （TG） analysis. Kissinger-Akahira-Sunose （KAS） me- thod and Flynn-Wall-Ozawa （FWO） method were adopted to determine the activation energy. It was found that the ac tivation energy are 241. lkJ/mol and 253. 7kJ/mol, respectively, when the decomposition rate is within the range of 0. 3-0. 9. Mechanism function was obtained from the analysis of TG-DTG curves by both Coats-Redfern and Achar methods. The kinetic equation of BA-NP-ESO decomposition obtained shows that the decomposition reaction is a forth- order reaction, and the thermal degradation follows random nucleation and nucleus growth mechanism. The activation energy obtained are 250. 21 kJ/mol and 266.96kJ/mol, respectively, which are consistent with the results of KAS and FWO methods.

关 键 词：苯并噁嗪 酚醛 环氧豆油 三元聚合 热分解 动力学 

分 类 号：TQ323.1[化学工程—合成树脂塑料工业]