【摘要】 使用偏光显微镜、扫描电镜、透射电镜和广角Ｘ射线衍射法研究了插层聚合法制备的聚丙烯－蒙脱土(ＰＰ－ＭＭＴ)纳米复合材料的微观结构和形态发展．结果表明,随着插层聚合反应的进行,较大的初级ＭＭＴ粒子逐渐剥离成较小的次级粒子．次级粒子由２~２０片的单个ＭＭＴ片层组成,其层间充满了ＰＰ分子链．提出了插层聚合过程中ＰＰ－ＭＭＴ复合材料的形态发展模型．另外,ＭＭＴ的加入对ＰＰ的球晶形态也有重要影响,ＰＰ完整的球晶随ＭＭＴ的加入逐渐变小和趋于扭曲甚至破碎．更多还原

【Abstract】 Polypropylene/montmorillonite(PP-MMT) nanocomposites were synthesized via intercalativepolymerization. The morphology evolution and microstructure of the nanocomposites were investigated bymeans of polarized optical microscopy(POM), scanning electron microscopy(SEM), transmssion electronmicroscopy(TEM) and wide angle X ray diffraction (WAXD). It has been found that the big primaryMMT particles were mostly dissociated into smaller secondary particles, which consists of 2~20 individualMMT layers and expanded gallery distance full of PP chains. The morphology evolution model of thePP-MMT during the intercalation polymerization is discussed. It has been also found that the presence ofMMT influences the spherulite morphology of the polypropylene in the PP-MMT nanocomposites with in-creasing of MMT content in nanocomposite, the dimension of the spherulite reduced and the shape becamedistorted.更多还原