聚酰胺固化环氧树脂的热分解动力学研究  

Investigation of Thermal Decomposition Kinetics of Epoxy Resin Cured by Polyamide

作　　者：王鸿波 魏晓萍[2] 何优选[2] 李红山[2] 

机构地区：[1]梅州市环境监测中心站,广东梅州514000 [2]嘉应学院化学与环境学院,广东梅州514015

出　　处：《胶体与聚合物》2011年第2期75-78,共4页Chinese Journal of Colloid & Polymer

摘　　要：利用热重分析（TG）采用不同升温速率（10,15,20,25℃/min）分别在空气和氮气气氛下对聚酰胺固化环氧树脂热稳定性进行了研究。采用Coats-Redfern和Ozawa热分析处理动力学数据的方法,计算了环氧树脂热分解反应活化能E、反应级数n及频率因子A。求得空气气氛下5%～30%的失重率下反应表观活化能在70.38~144.94KJ/mol之间,频率因子lnA值在22.67~34.34min-1之间,氮气气氛下5%～30%的失重率下反应表观活化能在79.36~110.96KJ/mol之间,频率因子lnA值在24.26~28.11min-1之间,聚酰胺固化环氧树脂的的热裂解反应和热氧化分解反应均为一级反应。The thermal gravimetric analysis（TG） was used to study the thermal stability of epoxy（EP） cured by polyamide at heating rate of 10,15,20,25℃/min in the fluid of air or N2.The activation energy,reaction order and pre-exponential factor were evaluated from common TG curves by Coats-Redfern and Ozawa methods.As to thermal oxidation decomposition reaction,the activation energy was increased from 70.38 to 144.94KJ/mol,ln A was increased from 22.67 to 34.34 min-1 with increase of weight loss rate from 5% to 30%.As to pyrolysis reaction,the activation energy was increased from 79.36 to 110.96 KJ/mol,ln A was increased from 24.26 to 28.11 min-1 with increase of weight loss rate from 5% to 30%.The results showed pyrolysis reaction and thermal oxidation decomposition reaction of epoxy resin cured by polyamide were first order reaction.

关 键 词：环氧树脂 聚酰胺 热重分析 分解动力学 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]