Free-radical-initiated polymerization of N(p-phenoxy-phenyl)maleimide and copolymerization with styrene, alpha-methylstyrene and beta-methylstyrene

摘要

Synthesis and free-radical-initiated homopolymerization of phenoxy-phenylmaleimide (PhOPhMI) and copolymerization with styrene (St), (alpha-methylstyrene (alpha MeSt) and beta-methylstyrene (beta MeSt) are described. It was found that alternating copolymers are formed under different monomer-to-monomer ratios in the feed and that the mechanism based on the participation of CT-complex best explains the formation of alternating-copolymers. Equilibrium constants of CT-complexes are: K-PhOPhMI/St = 0.20 L mol(-1); K-PhOPhMI/alpha MeSt = 0.05 L mol(-1); K-PhOPhMI/beta MeSt = 0.02 L mol(-1) Homopolymer and co-polymers are film-forming materials, stable up to 350 degrees C under TGA conditions. T-g s and higher transition temperatures are within the thermally stable region.