摘要
制备了炭化硅/环氧树脂(SiC/EP)和炭化硅接枝聚甲基丙烯酸缩水甘油酯/环氧树脂(SiC-g-PGMA/EP)两种纳米复合材料,通过差示扫描量热法(DSC)研究了纳米SiC粒子的加入及其表面接枝改性等对环氧树脂体系固化过程的影响。研究结果表明,纳米SiC粒子的加入及其表面接枝PGMA改性可以降低固化体系的理论凝胶温度,使固化反应放热比较平缓,有利于成型加工。同时,由于粒子表面羟基的催化作用及接枝物PGMA中环氧基团的反应活性,对固化反应的进行有明显的促进作用。
Nano-SiC/epoxy and SiC-g-PGMA/epoxy composites were prepared in this work. The influence of addition of nano-SiC particles and its surface grafted modification on curing reaction of epoxy resin were studied by means of non-isothermal differential scanning calorimetry （DSC）. Besides, decreasing theoretical gel temperature, the presence of nano-SiC particles and its surface grafted modification result in relatively slowed exothermic reaction, which are favorable for molding processing. Meanwhile, the addition of nano-SiC particles and its surface grafted modification promote curing reaction, which are contributed to the catalytic effect by the hydroxyl groups on nano- SiC particles and the reactivity of epoxide groups on grafted polymer PGMA.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2009年第5期118-121,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(50273047)
广东省自然科学基金团队研究项目(20003038)
华南农业大学博士启动基金(4900K06138)
