纳米SiC-g-PGMA粒子／环氧树脂的固化动力学  

Curing Kinetics of Grafted Nano-SiC/EP Composites

作　　者：罗颖[1,2] 董先明[1] 容敏智[2] 章明秋[2] 

机构地区：[1]华南农业大学理学院应用化学系,广东广州510642 [2]中山大学材料科学研究所,广东广州510275

出　　处：《高分子材料科学与工程》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)

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.

关 键 词：纳米复合材料 表面改性 固化动力学 

分 类 号：TB383[一般工业技术—材料科学与工程]