Abstract
A novel benzoxazine monomer containing maleimide functional group, namely 1-[3-(4-methyl-phenyl)-3,4-dihydro-2H-benzo[e][1,3]-oxazine-6-yl]maleimide (HPM-Bz-Me), was synthesized. Its copolymerization with styrene was also investigated. The structures of the monomer and the resulting copolymer were identified by NMR and FTIR. Results showed that a nearly alternating copolymer poly(HPM-Bz-Me- co-St) was obtained. The mechanism of alternate complex and the effect of solvent polarity on the copolymer stereochemistry, which further affected the thermal performance of the copolymers, were discussed. TGA results showed that the copolymer emerged good thermal properties. The 10% weight loss temperature was about 441 °C and char yield was 48% at 600 °C, which showed that the copolymers could be used as high thermal resistance materials. The curing kinetics of poly(HPM-Bz-Me- co-St) was investigated via non-isothermal DSC at different heating rates by Kissinger, Ozawa, Flynn-Wall-Ozawa and Friedman methods. The autocatalytic kinetic model was found to be the best description of the investigated curing reactions.
Published Version
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