Thermal conductivity and dielectric properties of epoxy composites with hyperbranched polymer modified boron nitride nanoplatelets

In this work, by using a hyperbranched aromatic polyamide grafted boron nitride nanoplatelets (BNNP-HBP), epoxy nanocomposites with high thermal conductivity and high breakdown strength are successfully prepared. All the composite samples with less than 40 wt% BNNP-HBP show increased thermal conductivity and breakdown strength when compared the pure epoxy resin and the composites with as received BNNPs. The dielectric measurements also show that the incorporation of BNNPS does not affect the dielectric constant and dielectric loss tangent of the composites.