Abstract
Novel polymer alloys were prepared by thermal treatment up to 240 °C of the mixture of high molecular weight benzoxazine and typical bismaleimide, N,N'- (4,4'-methylenediphenylene)dimaleimide. Polymerization behaviors of the blend mixtures were investigated using IR and DSC, which showed that obtained polymer alloys are AB-co-crosslinked polymer networks through the formation of ether linkage between the hydroxyl group of polybenzoxazine and the double bond of bismaleimide by the heat treatment. Viscoelastic analysis measurement exhibited that the polymer alloys have much higher glass transition temperatures than those of homopolymers. The thermal stability of polymer alloys was examined by TGA. The initial degradation temperature increased with the increase of bismaleimide content. Char yield of polymer alloys at 850 °C was higher than that of each homopolymer.
