PP/石墨/CaCO_3导热复合材料制备及性能  

Preparation and Property of PP/Graphite/CaCO_3 Thermal Conductive Composites

作　　者：成敏[1] 张云灿[1] 韦亚兵[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《现代塑料加工应用》2013年第1期5-9,共5页Modern Plastics Processing and Applications

摘　　要：采用熔融共混法制备聚丙烯(PP)/石墨/CaCO3导热复合材料,分别研究了CaCO3增韧母料、石墨的添加量对复合材料导热性能及力学性能的影响。结果表明:500A的CaCO3增韧母料对改善复合材料的综合性能最为有效;将石墨和500A共混复合时,可以同时提高复合材料的刚性和韧性;随着500A及石墨用量的增加,复合材料的热导率及热稳定性相应提高,熔融温度略微下降;复合材料中PP的结晶度随500A用量的增加而下降,随石墨用量的增加而增加;PP/石墨/500A(质量比45/30/25)复合材料的热导率为纯PP的3倍,缺口冲击强度与纯PP相近,拉伸强度有所下降,弯曲强度和弯曲模量增加了28%。Polypropylene （PP）/graphite/CaCO3 thermal conductive composites were prepared by melt compounding method. The effects of toughening master batch of Ca- CO3, graphite content on thermal conductivity and mechanical property of the composites were studied respectively. The results show that 500A CaCO3 is the best ef- fective to improve comprehensive property of the composites in all toughening master batch~ by adding the toughening master batch and graphite, the toughness and the stiffness of the composites are improved simultaneously~ with increasing the content of 500A and graphite, the thermal conductivity and thermal stability of the composites are increased, and the melting temperature is slightly decreased~ with increasing of the a- mount of 500A, the crystallinity of PP of the composites decreases, but graphite is the opposite when the mass ratio of PP/graphite/500A is 45/30/25, the thermal conductivity of the composites is two times more than that of pure PP, the impact strength is similar with pure PP, the notched tensile strength decreases, flexural strength and flexural modulus increase.

关 键 词：聚丙烯 石墨 碳酸钙 复合材料 增韧母料 热导率 热稳定性 力学性能 

分 类 号：TB33[一般工业技术—材料科学与工程]