研究了增容作用和动态固化对聚丙烯(PP)/环氧树脂(EP)共混物形态结构的影响.实验结果表明,PP/EP共混物是不相容共混体系,当环氧树脂含量小于50%时,共混物中环氧树脂以分散相存在,PP为连续相.反之,则共混物的相态发生相反转,即环氧树脂为连续相,PP为分散相.加入马来酸酐接枝聚丙烯(MAH-g-PP)促进环氧树脂与PP的相容性,使得分散相的颗粒明显变小.与PP/EP和PP/MAH-g-PP/EP共混物不同,当环氧树脂含量大于50%时,动态固化PP/EP和PP/MAH-g-PP/EP共混物仍是环氧树脂分散相和PP连续相结构,未出现相反转.对于相同含量环氧树脂的共混物,动态固化PP/MAH-g-PP/EP共混物中环氧树脂分散相尺寸明显小于动态固化PP/EP共混物中环氧树脂分散相尺寸.
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