新型柔性固化剂的合成与性能表征  

Synthesis and Properties of a Flexible Curing Agent

作　　者：王熙[1] 

机构地区：[1]西安建筑科技大学材料与矿资学院,陕西西安710055

出　　处：《合成材料老化与应用》2015年第1期27-31,共5页Synthetic Materials Aging and Application

摘　　要：环氧树脂具有优良的热稳定性、电绝缘性能和物理、机械性能,但其固化后较脆、不耐冲击和容易应力开裂。本文提出在合成一种新型柔性环氧树脂固化剂,通过与环氧树脂固化反应后提高环氧树脂韧性的改性思路,达到提高环氧树脂韧性而不降低树脂固化物的强度和模量的目的。研究结果表明,当柔性固化剂的用量为质量百分含量在10%~15%之间时韧性达到最大。对于使用柔性固化剂固化环氧树脂,当柔性固化剂的用量为环氧树脂质量百分含量的10%时达到最大值,冲击韧性和断裂韧性分别比纯环氧树脂提高了33.3%和96.3%。柔性固化剂的用量为环氧树脂质量百分含量的10%时,在-50℃时冲击韧性大小为19.5k J·m^-2,而此时纯环氧树脂的冲击韧性仅为7.96k J·m^-2。This paper presents the synthesis of a new type of flexible epoxy curing agent and an approach to improve the toughness of epoxy resin by curing without reducing the strength and modulus of the resin-cured material.The results show that the degree of toughness reaches maximum values when the flexible curing agent is applied at weight percentages（ wt. %） between 10% and 15%. When the amount of flexible curing agent added to epoxy resin weight is 10 wt. %,the impact toughness and fracture toughness increases by 33. 3% and 96. 3%,respectively,compared with the pure epoxy resin. When the amount of flexible curing agent added to epoxy is 10 wt. %,the resulting impact toughness of the material is 19. 5k J·m^-2at-50℃,the impact toughness of pure epoxy resin is only7. 96 k J·m^-2.

关 键 词：环氧树脂 分子合成 机械性能 动力学 断裂韧性 增韧机理 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业] TV46[水利工程—水工结构工程]