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.
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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第4期734-738,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:59833130)资助.
