考察了熔融挤出后施加的牵伸比和增容剂对聚丙烯(PP)/热致液晶聚合物(TLCP)原位复合材料中TLCP分散相形貌的影响.结果表明,复合材料中的TLCP相随着牵伸比的增大逐渐形成良好的微纤结构,TLCP微纤的长径比随牵伸比增大而增大;当体系中加入增容剂PP-g-MAH后,体系中TLCP在较小的牵伸速率下即可形成长径比很大的微纤结构.将上述所得原位复合材料与玻纤在200℃(低于TLCP熔融温度)下熔融挤出制得玻纤和液晶聚合物微纤混杂增强的材料.实验证明,在此加工温度下液晶聚合物形态得到较好保持,注射样品中不存在原位复合材料中典型的"皮-芯"形貌.同时,增容剂PP-g-MAH还明显改善了玻纤与基体之间的界面粘结.
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