聚丙烯与玻璃纤维界面结晶行为的研究

CRYSTALLINIC BEHAVIOR OF POLYPROPYLENE ON THE INTERFACE OF ITS COMPOSITE REINFORCED WITH GLASS FIBER

通过偏光显微镜研究了不同组成聚丙烯（ＰＰ）与不同表面处理单丝玻璃纤维（ＧＦ）界面上结晶形态的变化。在玻纤采用含胺硅烷偶联剂处理，基体ＰＰ中加入酸酐类改性聚丙烯（ＭＰＰ）时，由于界面上化学键结合及冷缩产生界面应力的作用，从而导致在通常物理结合和弱化学键结合情况下不能产生的横晶出现。通过广角Ｘ射线衍射分析发现，ＭＰＰ的加入虽然使ＰＰ的结晶度有所提高，但却未改变其晶型。

With polypropylene(PP) of various prescriptions and differently surface treated glass fiber, the composite samples containing a single fiber are made by means of solution method, devolatilization of solvent, melting and recrystallization. With polarization microscope(PMS), it is found that crystallinic morphology of PP on the interface appears in a regular pattern following the interface treatment from physical bonding to chemical bonding. While the glass fiber is treated with the silicone coupling agent containing amine, at same time, anhydride grafted PP(MPP) is mixed into PP matrix, a special kind of transcrystalline structure will obviously appear at the interface. By means of wide angle X ray diffraction analysis, it is found that adding of MPP into the PP matrix does not change the crystalline of PP, but does enhance its crystallinity.