Thermal and flammability behaviour of copolymers of N‐(2, 4, 6‐tribromophenyl)maleimide with some acrylates

Abstract

The copolymers of N‐(2, 4, 6‐tribromophenyl)maleimide (TBPMI) with methyl acrylate, methyl methacrylate and acrylonitrile of different composition were prepared by free radical polymerization at low conversion. Their thermal behaviour was established by TGA measurements in helium atmosphere and flammability properties were determined by limiting oxygen index method. The higher TBPMI content in the copolymer led to a higher thermal stability and lower flammability particularly when Sb2O3 was used as a synergist.

Blends Based on Copolymers of Methyl Methacrylate with Phenyl Maleimide and Tribromophenyl Maleimide

“…The structures of the maleimide monomers are illustrated in Figure . Syntheses of MMA−TBPMI copolymers − and of MMA−PMI copolymers − have been reported previously. Methyl methacrylate (Aldrich Chemical Co.) was vacuum distilled to remove inhibitors and kept refrigerated until use.…”