Patent ID: 8784980

Claim:
A film having a thickness of less than 500 μm comprising a polymer and a plurality of surface-modified hexagonal boron nitride (“SMhBN”) particles dispersed therewithin, wherein the surface modified boron nitride particles are produced by reacting hexagonal boron nitride particles with a substituted phenyl diazonium chloride represented by the structure (I): to covalently bond a substituted phenyl radical to a surface of the hexagonal boron nitride particles, the substituted phenyl radical being represented by the structure (II): wherein X is a radical selected from NH 2 —, HO—, R 2 OC(O)—, R 2 C(O)O—, HSO 3 —, NH 2 CO—, halogens, alkyl and substituted or unsubstituted aryl; wherein R 1 is hydrogen, alkyl or alkoxy, and R 2 is hydrogen, alkyl, or substituted or unsubstituted aryl.