羧基化聚丙烯在聚丙烯／5A分子筛复合材料中的增容作用

利用扫描电镜、偏光显微镜、流变等手段探讨了羧基化聚丙烯（EPP）在聚丙烯／SA分子筛（PP／5A）共混物中的增容作用，以及对复合材料力学性能，形态结构和流变行为的影响。用红外光谱和X-射线衍射对EPP的增容机理进行了探讨。结果表明：EPP的加入改善了复合材料的相容性。在EPP含量为10％时，复合材料的综合性能最好，其拉伸强度、冲击强度分别较PP／SA提高了2．9％、31．8％。IR和XRD表明EPP是通过极性基团与5A之间以分子间作用力结合，另一端与基体PP产生共晶，从而发挥增容作用。

Study on Compatibilization of Carboxylic Polypropylene on Polyropylene/5A Molecular Sieves Composites

The effect of carboxylic polypropylene (EPP) on the mechanical properties,rheological behavior, morphology, and compatibility of polypropylene/molecular sieves type 5A(PP/5A)composites was studied using scanning electron microscope (SEM), polar optical microscope (POM), and rheological tests. When the loading of EPP was 10 wt% , the impact strength and tensile strength were increased by 31.8 % and 2.9 %, respectively, based on default system. The compatibilization mechanism of EPP was explored using IR and X-ray diffraction (XRD). It showed that EPP was chemically bonded with 5A and co-crystallized with regular PP, thus the compatibilization was achieved.