超支化聚芳酰胺接枝氮化硼/环氧复合材料的制备与性能研究

Preparation and Properties of Boron Nitride/Epoxy Composite Grafted with Hyperbranched Aromatic Polyamide

采用两步法将超支化聚芳酰胺接枝到氮化硼粒子表面,并将其掺入到环氧树脂中,制备了一系列复合材料,并对复合材料的微观形貌、玻璃化转变温度、导热性能及电气强度进行了测试研究。结果表明:超支化聚芳酰胺接枝氮化硼粒子在环氧树脂中有较好的分散性,复合材料的电气强度、玻璃化转变温度和导热系数均得到了提高。

The boron nitride（BN） particles were grafted with hyperbranched aromatic polyamide by two-step method, and then an epoxy composite was prepared by adding the grafted boron nitride parti- cles. The morphology, glass transition temperature, thermal conductivity and electric strength of the com- posite were studied. The results show that the BN particles grafted with hyperbranched aromatic polyam- ide can well dispense in the epoxy resin; and the glass transition temperature, thermal conductivity and electric strength of the composite can be improved.