Free-Radical-Initiated Polymerization of N(p-Phenoxy-phenyl)maleimide and Copolymerization with Styrene, α-Methylstyrene and β–Methylstyrene |
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Authors: | R Vukovic D Fles A Erceg |
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Institution: | INA-Industrija Nafte, Research and Development , Zagreb, Croatia |
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Abstract: | Abstract Synthesis and free-radical-initiated homopolymerization of phenoxy-phenylmaleimide (PhOPhMI) and copolymerization with styrene (St), (α-methylstyrene (αMeSt) and β–methylstyrene (β-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 Lmol?1; KPhOPhMI/αMeSt = 0.05 Lmol?1; KPhOPhMI/βMeSt = 0.02 Lmol?1. Homopolymer and co-polymers are film-forming materials, stable up to 350°C under TGA conditions. Tg s and higher transition temperatures are within the thermally stable region. |
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