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中文摘要：
采用原位成纤复合法制备了均聚聚丙烯（PP—H）／聚对苯二甲酸乙二酯（PET）原位成纤复合材料，研究了PET原位微纤化对PP—H力学性能的影响。实验采用的设计工艺可实现PET在PP-H基体中原位微纤化；原位生成的PET纤维对PP—H力学性能的影响呈各向异性，表现为拉伸及弯曲强度提高，冲击强度下降，改善效果受PET微观形态的影响；增大表观拉伸比和添加少量增容剂有利于形成PET微纤，同时，复合试样内PET的形态也受再加工注塑温度的影响。
英文摘要：
The authors prepared homo-polypropylene/polyethylene terephthalate （PP-H/PET） composites through in-situ fibrillation and studied influences of in-situ microfibrillation of PET on the mechanical properties of PP-H. The design technology adopted in the experiment of the present work was available for realizing in-situ microfibrillation of PET in PP-H matrix. The PET micro-fibers formed in-situ had anisotropic impact on PP-H＇s mechanical properties, leading to an enhancement in tensile and flexural strength but a reduction in impact strength of the latter. The improvement effect was affected by the micromorphology of the PET fibers in PP-H/PET composites. Increasing apparent stretching ratio or adding a small amount of compatiblizer was favorable to formation of the PET micro-fibers. In addition, the morphology of the PET micro-fibers in the PP-H/PET composites was dependent on injection molding temperature of the reprocessing.
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