摘要
以2-乙基-4-甲基咪唑作为固化剂,运用红外光谱对端羧基丁腈橡胶(CTBN)增韧改性环氧树脂(EP)的预聚反应和固化反应进行分析。通过测试改性环氧树脂固化物的冲击强度、弯曲强度和拉伸剪切强度评价其增韧效果,探讨其增韧机理,并通过热失重(TG)分析固化物的热稳定性能。结果表明:CTBN改性EP后,树脂的冲击强度明显提高,拉伸剪切强度有所提高,热稳定性能提高,但弯曲强度和弯曲模量有所降低。
Using 2-ethyl-4-methyl imidazole as curing agent,pre-polymerization and curing reaction of epoxy resin modified by carboxyl-terminated nitrile rubber（CTBN） were analyzed by infrared spectroscopy.By testing the impact strength,flexural strength,tensile shear strength of modified cured epoxy resin,the toughening effects were evaluated and the toughening mechanism was investigated.The thermal stability of the cured resin was studied by thermogravimetric analysis（TG）.The results show that the impact strength of CTBN modified EP increases greatly,the tensile shear strength increases and the thermal stability improves,but the bending strength and bending modulus decrease.
出处
《绝缘材料》
CAS
北大核心
2011年第2期30-33,38,共5页
Insulating Materials
关键词
环氧树脂
端羧基丁腈橡胶
改性
力学性能
epoxy resin
carboxyl nitrile rubber
modification
mechanical properties
