摘要
采用傅里叶红外光谱法研究了双酚A缩水甘油醚/乙二胺环氧树脂(DGEBA/EDA)在不同温度时分解残留物的红外吸收光谱;利用热分析技术考察了DGEBA/EDA从室温到600℃之间的热解反应。结果表明,DGEBA/EDA环氧树脂在氮气中分解时存在一个热解阶段,最低热解活化能为195.74 kJ/mol。色谱-质谱联用(GC/MS)分析DGEBA/EDA环氧树脂热解残留物,表明在热解过程中主要生成苯酚、对异丙基苯酚和双酚A。讨论了DGEBA/EDA环氧树脂热解的机理。经热解后的残留环氧树脂的热稳定性降低明显,环氧树脂发生了明显的化学裂解。
The thermal degradation behaviors of diglycidyl ethers of bisphenol A /ethylenediamine（DGEBA/EDA） epoxy resin in N2 atmosphere were investigated by using thermogravimetry（TG） analysis from 25 ℃ to 600 ℃.The TG results show that DGEBA/EDA epoxy resin has only one degradation step,the lowest activation energy is 195.74 kJ/mol.The gaseous pyrolysis products were collected and characterized by gas chromatography-mass spectrometry（GC/MS） and their formation was discussed.The main pyrolysis products were phenol,p-isopropylphenol and bisphenol-A.The thermal degradation mechanism of DGEBA/EDA epoxy resin was discussed.The TG analysis of raw materials and solid epoxy resin product shows that the thermal stability of the resin reduces significantly after the degradation.The molecular weight of the solid product decreases and its degree of polymerization of epoxy resin is below the raw materials.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2011年第2期83-85,89,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(20777048)
关键词
环氧树脂
热重法
热解机理
活化能
DGEBA/EDA epoxy resin
thermal degradation
degradation mechanism
activation energy
