分子筛负载马来酸酐及改性PP的研究  

Studies on the Modification of Polypropylene by Molecular Sieves Loading with Maleic Anhydride

作　　者：李谷[1,2] 李文秀[2] 王庆国[2] 麦堪成[1,2] 

机构地区：[1]新型聚合物材料设计合成与应用广东省高校重点实验室中山大学化学与化学工程学院,广东广州510275 [2]聚合物复合材料与功能材料教育部重点实验室中山大学化学与化学工程学院,广东广州510275

出　　处：《塑料工业》2009年第8期14-17,共4页China Plastics Industry

摘　　要：通过物理吸附将马来酸酐(MAH)负载在分子筛上,经母料法熔融制备了PP/分子筛复合材料。采用DSC、POM和电子拉力机等方法对复合材料的结晶行为和力学性能进行研究。结果表明:分子筛对PP结晶起到异相成核作用,随分子筛用量增加,复合材料的结晶温度由纯PP的116.3℃提高到119.5℃,结晶热焓逐渐减小,熔融热焓逐渐增大,复合材料的拉伸强度、弯曲强度及弯曲模量有不同程度的提高。低MAH负载量的分子筛(质量分数3%)有助复合材料力学性能的进一步提高,复合材料的拉伸强度、弯曲强度、弯曲模量及冲击强度分别由纯PP的35.3MPa、45.2MPa、1.47GPa及2.24kJ/m2提高到37.6MPa、53.5MPa、1.85GPa及3.01kJ/m2。MAH具有诱导PP形成β晶的倾向,150℃附近的β晶熔融峰强度随MAH用量增加而提高。In this paper, modified molecular sieves by loading maleic anhydride （MAH） via physical adsorption, and prepared polypropylene （PP）/molecular sieves composites by melting extrusion. The crystallization and mechanical properties of PP/molecular sieves composites were studied by different scanning calorimeter （DSC）, polarizing optical microscope （POM） and mechanical test. The results showed that sieves had heterogeneous nucleation effect on PP crystallization, the crystallization temperature increased from 116.3℃ of the pure PP to 119.5℃ as the content of the molecular sieves increased. The crystallization enthalpy decreased, melting enthalpy increased, tensile strength, flexural strength and flexural modulus of composite improved to different extents. The tensile strength, flexural strength, flexural modulus and impact strength were increased from 35.3MPa, 45.2MPa, 1.47GPa and 2. 24kJ/m^2 of PP to 37.6MPa, 53.5MPa, 1.85GPa and 3.01kJ/m^2 respectively for PP composites with 3wt% molecular sieves modified by MAH. And the β melting phenomena could be observed, the strength of β melting phenomena increased with the increase of MAH content near 150℃.

关 键 词：聚丙烯 分子筛 马来酸酐 结晶行为 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]