摘要
对比了两种不同测试方法及不同固化条件对HDT的影响,研究了不同固化剂、稀释剂和增韧剂的环氧结构胶耐热性能,并对压注型粘钢结构胶的配方进行了优化.试验结果表明,当采用改性脂环胺、酚醛胺等刚性较大的固化剂、官能度较高的环氧稀释剂和'海岛结构'橡胶弹性体增韧剂时,结构胶同时具有良好的耐热性能和冲击韧性.优化后的结构胶HDT达到65.9℃,T冲击剥离长度为21mm,其综合性能完全满足结构加固需要.
This article presented the comparisons of two different testing methods and different curing conditions for heat deflection temperature（HDT）. The effects of curing condition, curing agent, diluent and toughener on the heat resistance performance of epoxy structural adhesive were studied by testing the HDT of epoxy structural adhesives, and an optimized formula of pressure injection adhesive for steel-bond- ing was found. The results have indicated that epoxy structural adhesive has good heat resistance perform- ance and impact toughness by using rigid curing agent （such as modified alicyclic amines and phenolic a- mine）, epoxy diluent with high functionality and the ＂island structure＂ toughener. The optimized adhesive has a HDT up to 65.9℃ and a T impact peeling length of 21mm , whose overall performance can meet all the requirements of structural strengthening.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第9期25-29,共5页
Journal of Hunan University:Natural Sciences
基金
长沙市重大科技专项资助项目(K1204010-31)
关键词
环氧胶粘剂
耐热
热变形温度
epoxy adhesive
heat resistance
heat deflection temperature
