PA66/PET/滑石粉复合材料研究  

Research on PA66/PET/Talc Composite

作　　者：杨庆泉[1] 郭朝霞[1] 于建[1] 

机构地区：[1]清华大学化工系高分子研究所,北京100084

出　　处：《中国塑料》2008年第7期16-20,共5页China Plastics

摘　　要：考察了滑石粉对聚酰胺66/聚对苯二甲酸乙二醇酯(PA66/PET)合金微观相形态、力学性能、耐热性能及结晶行为等方面的影响及其作用机制。结果表明:在使用适当的稳定剂和助剂配合的条件下,添加5%～10%的滑石粉,将使 PA66/PET 合金的力学性能得到显著的改善;滑石粉的添加,可以显著地减小 PET 分散相粒子的平均粒径及其粒径分布,起到了改善 PA66/PET 共混体系混溶性的作用,其增容机制被认为与其片层对 PET 相的切割作用和物理阻隔作用有关;滑石粉的添加可使体系中 PA66部分的△H_c 减小而使 PET 部分的△H_c 增加;滑石粉的加入导致材料强度、刚性和耐热性提高,可能与其片层对 PA66基体及其对 PA66/PET 之间微观相界面的增强作用有关。This paper investigates systematically the effect and mechanism of talc on the micro-morphol- ogy, mechanical properties, heat-resistance and crystallization of PA66/PET alloy. The main conclu-sions are as follows： addition of talc （5 %-10 % ） and appropriate assistant agent induces a remarkable increase in the mechanical properties of PA66/PET alloy; talc can dramatically reduce the size and size distribution of PET phase and plays a role of compatibilizer, this role owes to segmentation and barrier of talc on PET phase; talc decreases the △Hc of PA66 part and increases the AHc of PET part; increases in strength, stiffness and heat resistance of PA66/PET alloy are due to the strengthening of talc lamellar on PA66 matrix and the interface between PA66 and PET, and the toughening effect of talc is related to the decrease in crystallinity of material and the improvement in the compatibility of PA66 and PET.

关 键 词：聚酰胺66 聚对苯二甲酸乙二醇酯 滑石粉 微观相形态 力学性能 结晶行为 

分 类 号：TQ320.7[化学工程—合成树脂塑料工业]