碳酸钙品种对无规共聚聚丙烯树脂力学性能与热传导性能的影响  

Effect of Varieties of Calcium Carbonate on the Mechanical Property and Thermal Conductivity of Random Copolymer Polypropylene Resin

作　　者：郭赫楠 段磊[1] 温变英[1] 张扬[1] 

机构地区：[1]北京工商大学材料与机械工程学院,北京100048

出　　处：《高分子材料科学与工程》2015年第11期75-79,85,共6页Polymer Materials Science & Engineering

基　　金：国家自然科学基金面上项目(21274007);北京工商大学高分子功能薄膜创新团队资助项目(19008001071)

摘　　要：采用不同品种的碳酸钙粒子与无规共聚聚丙烯(PPR)熔融共混,制备了系列碳酸钙/PPR复合材料。考察了碳酸钙粒子形状、粒径和弹性体增容剂对PPR树脂力学性能和热传导性能的影响。结果表明:粒子形状对复合材料的热传导性能有重要影响,其中,无定形的重质碳酸钙对复合材料热传导性能的提高优于纺锤形的轻质碳酸钙和针状碳酸钙晶须。粒径对复合材料的热性能也有影响,小尺寸粒子对改善复合材料的热传导性能更好。弹性体增容剂对改善复合材料的韧性发挥了重要作用,但其对材料热传导性能的提高无益。Calcium carbonate（CaCO3 ）/random copolymer polypropylene （PPR） composites were prepared by melt- mixing technique. The effects of the shape and size of particles and compatibilizer elastomer on the mechanical property and thermal conductivity of the composites were investigated in details. The results show that the shape of particles plays an important rule on thermal conductivity of the composite. There are more obvious improving effects on thermal conductivity by using irregular-shaped heavy CaCOa than spindle-shaped light CaCO3 and needle-like CaCO3 whisker. Further study reveals that the better thermal conductivity could be obtained by using small size particles than the large particles. Moreover, the toughness of composites could be improv.ed significantly by adding compatibilizer elastomer. But addition of compatibilizer elastomer has no obvious effects on the thermal conductivity property of composites.

关 键 词：无规共聚聚丙烯 碳酸钙 复合材料 性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]