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采用扫描电镜(SEM)、偏光显微镜(POM)和流变仪等手段,考察了硅烷KH-550作为一种高分子增容剂对聚丙烯/5A分子筛(PP/5A)复合材料力学性能、形态结构和流变行为的影响,并用红外光谱和X-射线衍射(XRD)对硅烷的增容机理进行了探讨。实验结果表明:硅烷是体系有效的增容剂,能提高材料的力学性能。PP/5A/硅烷(100/9/0.2)复合材料综合性能最佳,冲击强度和拉伸强度比PP/5A分别增加了26.7%和2.2%。硅烷激活了5A的β成核作用,使球晶粒径分布变窄,且分布均匀,提高了5A在基体中的分散性。并且硅烷接枝在5A的表面,增强了5A粒子与PP基体间的粘结力,改善了PP/5A体系的相容性。
The mechanical properties and morphologies of polypropylene / 5A molecular sieve (PP / 5A) composites were investigated using scanning electron microscopy (SEM), polarizing microscope (POM) and rheometer. Structure and rheological behavior. The mechanism of silane compatibilization was also studied by means of IR and X-ray diffraction (XRD). The experimental results show that silane is an effective compatibilizer for the system and can improve the mechanical properties of the material. The composite with PP / 5A / silane (100/9 / 0.2) composites showed the best overall performance, and the impact strength and tensile strength increased by 26.7% and 2.2% respectively compared with PP / 5A. Silane activates the beta nucleation effect of 5A, which makes the spherulitic grain size distribution narrower and evenly distributed, and improves the dispersibility of 5A in the matrix. And silane grafted on the 5A surface, enhance the adhesion between the 5A particles and the PP matrix, improving the compatibility of the PP / 5A system.