硅烷在聚丙烯/5A分子筛复合材料中的增容作用  

Compatibilization of Silane in Polypropylene/Molecular Sieves Type 5A Composites

作　　者：郭华英[1] 马志领[1] 郭成秀[2] 

机构地区：[1]河北大学化学与环境科学学院,河北保定071002 [2]河北大学生命科学学院,河北保定071002

出　　处：《塑料》2007年第3期15-18,23,共5页Plastics

摘　　要：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 influences of KH-550 silane as a compatibilizer on the mechanical properties, morphological and rheological behavior of polypropylene/molecular sieves type 5A （PP/5A）composites were studied by scanning electron microscope （SEM）, polar optical microscope （POM） and flow tests. The compatible mechanism of silane was discussed by using IR and X-ray diffraction （XRD）. The results showed that silane was a true compatibilizer of the system, and the properties of PP/5A/silane （100/9/0.2） composites attained a peak. Compared with the PP/5A composites without silane, the impact strength and tensile strength were improved respectively by 26.7% and 2.2%. Silane activated the heterogeneous nucleation centers on 5A and narrowed down and uniformed the distribution of the spherulite diameter, improved the interfacial dispersibility of 5A in the matrix. Silane grafted on the surface of 5A, and enhanced the adhesion of matrix-filler surface,improved the compatibility of 5A and PP.

关 键 词：硅烷 聚丙烯 5A分子筛 增容 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]