中国科学院大学学报2024，Vol.41Issue(1)：42-49,8.DOI:10.7523/j.ucas.2022.049
1,3-二(2'-氨基亚乙基)-2-甲基咪唑溴盐与环氧树脂E-51的固化工艺
Curing process of 1,3-di(2'-aminoethyl)-2-methylimidazolium bromide with epoxy resin E-51
摘要
Abstract
A diaminoimidazole ionic liquid curing agent,1,3-di(2'-aminoethyl)-2-methylimidazolium bromide(DAIL)is prepared via quaternization of imidazole rings.With epoxy resin E-51 as matrix resin,the curing process conditions of DAIL as curing agent and the properties of cured products are studied in depth.The results show that DAIL can be used as a medium temperature curing agent for epoxy resins.The optimal ratio of the two is DAIL:E-51=20:100,the optimal curing temperature range is 74～105℃,and the post-curing temperature is 162 ℃.The tensile strength of the cured cast body splines is 159 MPa,the elastic modulus is 2 281 MPa,and the elongation at break is 12.8％,the thermal decomposition temperature is 424.4 ℃.DMA analysis shows that the maximum loss factor tan8 of the DAIL/E-51 cast body is 0.56,and the glass transition temperature θg is 83 ℃,the corresponding storage modulus E is 290 MPa,and the crosslinking density is 30 149 mol·m-3.This study provides an important experimental basis for the use of high mechanical properties of medium temperature epoxy resin curing agent.关键词
1,3-二(2'-氨基亚乙基)-2-甲基咪唑溴盐/环氧树脂/固化剂/固化原理/固化动力学Key words
1,3-di(2'-aminoethyl)-2-methylimidazolium bromide/epoxy resin/curing agent/curing principle/curing kinetics分类
通用工业技术引用本文复制引用
苏泽,白金虎,吴琼,刘龙,张延强..1,3-二(2'-氨基亚乙基)-2-甲基咪唑溴盐与环氧树脂E-51的固化工艺[J].中国科学院大学学报,2024,41(1):42-49,8.基金项目
国家自然科学基金(22178359,21878278)资助 （22178359,21878278）
