丙烯腈-丁二烯-苯乙烯共聚物/六方氮化硼复合材料的制备及性能

Preparation and Properties of ABS/h-BN Composites

利用双螺杆的强剪切作用,制备了丙烯腈-丁二烯-苯乙烯(ABS)树脂/六方氮化硼(h-BN)复合材料(ABS/h-BN),通过测定复合材料的热导率和电阻率,并借助拉伸试验、动态力学分析、热失重分析等手段,研究了h-BN添加量对复合材料导热性能、力学性能、耐热性能和电绝缘性能的影响。结果表明,h-BN在ABS基体中发生了取向,当h-BN质量分数为20%时,复合材料的热导率由0.176 W/(m·K)提高到0.404 W/(m·K),增加了129.6%,且拉伸强度由35.26MPa提高到38.45 MPa。ABS/h-BN复合材料有望应用于家电等的外壳材料。

Melt blending method was used to prepare acrylonitrile-butadiene-styrene/hexagonal boron nitride（ABS/h-BN）composites by a co-rotating twin-screw extruder with strong shear force.The thermal conductivity,mechanical properties,thermostability and electrical insulating properties of ABS/h-BN composites with different h-BN contents were measured.The molecular movements of the composites were characterized by dynamic mechanical analysis（DMA）.The results show that h-BN plates are oriented in ABS matrix in the processing.When the h-BN loading is 20%,the thermal conductivity value is 0.404 W/（m·K）,compared with that of the ABS matrix,0.176 W/（m·K）.It is increased by 129.6%.Meanwhile,the tensile strength of the composite increases from 35.26 MPa to 38.77 MPa also.The ABS/h-BN composites are promising to use as appliance materials.