【摘要】 以ＤＳＣ、ＴＲＬＳ和ＳＥＭ等方法研究了固化剂ＤＤＳ用量对苯端基聚醚酰亚胺（Ｐ－ＰＥＩ）改性４，４′－二氨基二苯甲烷四缩水甘油环氧树脂（ＴＧＤＤＭ）体系的固化速率及相结构的影响．结果表明，２０ｐｈｒＰ－ＰＥＩ改性环氧体系在１５０℃固化时，随ＤＤＳ量增加，固化反应速率增大，相分离时间提前，形成了不同的相结构，解释了ＤＤＳ量对粘接剪切强度的影响．更多还原

【Abstract】 The effect of the amount of curing agent on phenyl terminated polyetherimide modified TGDDM systems has been studied by using DSC, time resolution light scattering(TRLS) and SEM. Increase of the amount of curing agent will enhance the rates of curing reaction and phase separation, thus change apparently the phase structure of TGDDM/P PEI(20 phr) blends and the shearing strength. An autocatalytic mechanism was observed for both neat epoxy and the epoxy/PEI blends, but the reaction rates for the blends were higher than that of the neat epoxy due to the presence of PEI.更多还原