文献类型：期刊文献

中文题名：端羟基聚丁二烯增韧环氧树脂的性能和微观形貌

英文题名：Properties and morphology of hydroxyl-terminated polybutadiene toughened epoxy resin

作者：易红玲[1];郑柏存[1,2,3];傅乐峰[2,3];周军杰[1]

机构：[1]华东理工大学体育新材料研发中心,上海200237;[2]上海三瑞化学有限公司,上海200237;[3]上海建筑外加剂工程研究中心,上海200232

年份：2015

卷号：38

期号：6

起止页码：471

中文期刊名：合成橡胶工业

外文期刊名：China Synthetic Rubber Industry

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD_E2015_2016】；

基金：国家自然科学基金资助项目(21506064)

语种：中文

中文关键词：环氧树脂;端羟基聚丁二烯;数均分子量;增韧;冲击强度;物理机械性能;热稳定性;微观形貌

外文关键词：epoxy resin; hydroxyl-terminated po-lybutadiene; number average molecular weight;toughening; impact strength; mechanical property;thermal stability; morphology

摘要：以不同数均分子量（珚Mn）的端羟基聚丁二烯（HTPB）为增韧剂,4,4-二氨基二苯甲烷为固化剂,考察了HTPB的珚Mn及用量对环氧树脂的冲击强度、拉伸性能、热稳定性及微观形貌的影响。结果表明,在胺类固化体系中,当HTPB的珚Mn为2 300--3 500且质量分数为1%~3%时,其对环氧树脂具有较佳的增韧效果,且不会对热稳定性产生太大的影响;随着HTPB用量的增加,改性环氧树脂中大尺寸橡胶粒子增多,且HTPB的珚Mn越大,改性环氧树脂中橡胶粒径越大,断裂面由光滑的脆性断裂特性变为粗糙、存在大量应力纹及应力发白区域的韧性断裂特性,再到平滑断裂和大尺度的橡胶颗粒两相分布的低韧性特性。
Effects of number average molecular weight and amount of hydroxyl-terminated polybuta- diene （HTPB） on the impact strength, tensile properties ,thermal stability and morphology of the toughened epoxy resins were investigated with diamino diphenyl methane（ DDM ）as curing agent. The results showed that for amine-cured epoxy resin system, HTPB had a better toughening effect and no siginificant impact on thermal stability when its number average molecular weight ranged between 2 300 and 3 500, and mass fraction in epoxy resin from 1% to 3%. With the increase of HTPB, the sample fracture changed from smooth brittle fracture to rough ductile one with a great number of stress cracks and stress whitening zones, again to a low tough smooth fracture with two- phase distribution of large sized rubber particles.