高分子硅烷偶联剂改性环氧树脂性能研究

INVESTIGATION ON EPOXY RESINS MODIFIED BY POLYMER COUPLING AGENT

采用侧链氨基硅油(AEAPS)和小分子偶联剂KH-560为原料合成了一系列氨基硅油高分子偶联剂(APCA)并用作双酚A型环氧树脂(EP)/4,4′-二氨基二苯基甲烷(DDM)体系的改性剂,系统研究了改性剂含量等对改性环氧固化物的冲击强度、拉伸强度、断裂伸长率、玻璃化转变温度(Tg)和断裂面形态等的影响。结果表明,APCA能明显提高固化体系的性能,其中环氧树脂经10份APCA-60改性后,与未改性环氧相比,抗冲强度提高了近一倍,断裂伸长率增加了94.55%,拉伸强度也提高了59.55%,而Tg也提高了5℃,达到了明显的增强增韧和提高耐热性等效果。

A series of polymer coupling agent containing amino group polysiloxane were synthesized and used to modify the Bisphenol A epoxy resins （EP）/4,4＇-diaminodiphenylmethane （DDM） curing system. And amino group polysiloxane was also used to modify EP for contrast. The impact strength, tensile strength, elongation at break, glass transition temperature （Tg） and the morphology of fracture surfaces was investigation. The results show that the addition of APCA has remarkahlely improved the mechanical and thermal properties, and systems containing 10 phr APCA-60, are found possessing improved toughness and thermal resistance of the cured materials. In contrast with the unmodified epoxy resin, the impact strength enhances one time, the elongation enhances 94.55%, the tensile strength enhances 59. 55%, and the Tg also enhances 5℃.