聚丙烯／玻璃纤维复合材料界面区的结晶行为

通过对聚丙烯／玻璃纤维复合材料体系等温结晶情况的研究。分析了ＰＰ／ＧＦ复合材料界面附近的结晶行为。结果表明ＧＦ对ＰＰ没有明显的异相成核作用，对ＰＰ基体内的成核杂质也无明显的吸附作用。由于ＰＰ快速冷却结晶生成斯迈其卡结构和缓慢冷却过程中ＰＰ分子的松弛作用，导致在等温结晶，淬冷和缓冷条件下制备的ＰＰ／ＧＦ试样界面处均未能生成明显的横晶结构。

CRYSTALLIZATION BEHAVIOR AT THE INTERFACE OF POLYPROPYLENE/GLASS FIBER COMPOSITES

Crystallization behavior for spherulite and transcrystals was studied by microscopical observation under isothermal crystallization condition for polypropylene/glass fiber composites. The impingement of transcrystals and matrix spherulite was also analyzed. It was found that transcrystals did not appear at the interface of the sample prepared by isothermal crystallization, glass fiber can not nucleate polypropylene and absorb nucleating impurity in PP matrix. Since polypropylene chains formed tiny crystals during quenching and relax at slow cooling rate, no transcrystals were observed either, but if the GF was pulled slightly before isothermal crystallization (PP was in melting state), the transcrystals would form at the interface of the samples prepared. Additionally, under the condition of this paper, the rate of transcrystals growing was the same as that of spherulite, so transcrystal can be thought as the variant of spherulite.