端羟基聚丁二烯增韧环氧树脂的性能和微观形貌

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。...

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Bibliographic Details
Published in合成橡胶工业 Vol. 38; no. 6; pp. 471 - 475
Main Author 易红玲 郑柏存 傅乐峰 周军杰
Format Journal Article
LanguageChinese
Published 上海建筑外加剂工程研究中心，上海 200232 2015
上海三瑞化学有限公司，上海 200237
上海建筑外加剂工程研究中心，上海 200232%上海三瑞化学有限公司，上海 200237
华东理工大学 体育新材料研发中心,上海,200237%华东理工大学 体育新材料研发中心，上海 200237
Subjects
冲击强度
增韧
微观形貌
数均分子量
热稳定性
物理机械性能
环氧树脂
端羟基聚丁二烯
impact strength
增韧
morphology
number average molecular weight
toughening
物理机械性能
端羟基聚丁二烯
mechanical property
thermal stability
环氧树脂
微观形貌
数均分子量
epoxy resin
hydroxyl-terminated po-lybutadiene
冲击强度
热稳定性
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Summary: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。
Bibliography: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.
62-1036/TQ
epoxy resin; hydroxyl-terminated po-lybutadiene; number average molecular weight;toughening; impact strength; mechanical property;thermal stability; morphology
YI Hong-ling, ZHENG Bai-cun, FU Le-feng, ZHO
ISSN:1000-1255