PBT/CF导热复合材料的制备与研究  

Preparation and Research of Thermally Conductive PBT/CF Composites

作　　者：洪玉琢 朱健[1] 冯正明[1] 戚嵘嵘[1] 

机构地区：[1]上海交通大学化学化工学院,上海200240

出　　处：《工程塑料应用》2015年第4期92-97,共6页Engineering Plastics Application

摘　　要：为了提高聚对苯二甲酸丁二酯(PBT)的热导率,采用碳纤维(CF)作为导热填料,制备了PBT/CF复合材料,并研究了复合材料的热导率和力学性能等。结果表明,CF的加入能够显著提高PBT/CF复合材料的热导率,且热导率具有方向性,PBT/CF复合材料层内方向的热导率高于层间方向的热导率;当CF用量为50份时,PBT/CF复合材料的层内热导率和层间热导率分别为1.034 W/(m·K)和0.635 W/(m·K),相比于纯PBT的0.237 W/(m·K),分别提高了336%和168%;随CF用量的增加,复合材料的拉伸强度呈现先上升后降低的趋势,当CF用量为20份时,复合材料的拉伸强度达到最大值,为91.5 MPa,断裂伸长率逐渐降低;Lewis-Nielsen模型对PBT/CF复合材料热导率的模拟效果较好,可以预测不同CF用量时复合材料的热导率。In order to improve the thermal conductivity of poly（butylene terephthalate）（PBT）,carbon fiber（CF） was chosen as the conductive filler. PBT/CF composites were prepared,and the thermal conductivity,and the mechanical properties of the composites were researched. The results show that CF can enhance observably the thermal conductivity of PBT/CF composites,and the thermal conductivity is different in different direction. The in-plane and through-plane thermal conductivity is 1.034 W/（m · K） and 0.635 W/（m · K） with 50 phr CF,which is increased by 336%and 168%compared with the pure PBT. The tensile strength of PBT/CF composites first increases and then decreases with the increase of CF,the tensile strength is 91.5 MPa with 20 phr CF, reaching the maximum strength;the elongation at break decreases with the increase of CF. The Lewis-Nielsen model simulates thermal conductivity of the composites well and can be used to predicted the thermal conductivity well with different CF content.

关 键 词：聚对苯二甲酸丁二酯 碳纤维 热导率 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]