【摘要】 合成与表征了一系列不同分子量的聚氧化丙烯（ＰＰＯ）接枝环氧树脂（ｅｐｏｘｙ－ｇ－ＰＯ），考察了这些接枝环氧树脂和它们网络的形态，以及它们与环氧树脂形成接枝网络后的物理性能．实验结果表明，ｅｐｏｘｙ－ｇ－ＰＯ接枝效率为０．９６左右；随ｅｐｏｘｙ－ｇ－ＰＯ中侧链长度的改变，导致接枝环氧树脂网络发生部分微观相分离行为．在环氧树脂中适量添ｅｐｏｘｙ－ｇ－ＰＯ能较大幅度地提高环氧树脂网络的韧性，与ｅｐｏｘｙ－ｇ－ＰＯ的形态有关．更多还原

【Abstract】 A series of polyoxypropylenegepoxy resins(epoxygPO) were synthesized from epoxy resin(epoxy) and polyoxypropylene with molecular weights from 230 to 1550. The grafting efficiency for these epoxygPOs was around 096. The morphology of such epoxygPOs and their networks were examined by means of FTIR, DSC and TEM, respectively. Partial microphase separation was observed in graft networks containing longer side chains(Mw≥950), while the graft network having short grafts(Mw=230) exhibited a compatible system. The impact strengths of epoxy cured with less amount of epoxygPO(5% to 10%,wt) were enhanced appreciably, while the tensile strength and the heat resistance for these graft networks remained nearly as those of epoxy network. All the physical properties of the graft epoxy networks could be well related to their morphologies.更多还原