Functional Copolymers of N-(4-Formyl-Phenoxy-4′-Carbonylphenyl) Maleimide with Styrene

Abstract

A new reactive N-substituted maleimide monomer containing an aldehyde function, N-(4-formyl-phenoxy-4′-carbonylphenyl) maleimide (MI-CHO), was synthesized. The radical copolymerization of MI-CHO with styrene was performed at 60 °C in the presence of 2,2′-azoisobutyronitrile as an initiator in dimethylsulfoxide. The copolymerization of MI-CHO with styrene yielded the ‘nearly equimolar’ alternating copolymers for the mole fractions of MI-CHO in the feed ranging from 0.2 to 0.7. The monomer reactivity ratios (r ₁, r ₂) in the polymerization of MI-CHO (M ₁) with styrene (M ₂) and the Alfrey–Price Q ₁ and e ₁ parameters were determined. The thermal properties of the copolymers were investigated by using thermogravimetric analysis and differential scanning calorimetry.

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