Journal of Applied Polymer Science, Vol.80, No.11, 1870-1879, 2001
Copolymerization of N-substituted maleimide with alkyl acrylate and its industrial applications
A series of new copolymers with desired thermal stability and mechanical properties for applications in leather industry were synthesized from various substituted maleimides and alkyl acrylates. Polymerization was carried out by a free-radical polymerization using benzoyl peroxide (BPO) as initiator. The monomers and polymers synthesized were characterized by elemental analysis, IR, and nuclear magnetic resonance (NMR). Interestingly, these polymers were soluble in common organic solvents. Copolymer composition and reactivity ratios were determined by H-1-NMR spectra. The molecular weights of the polymers were determined by gel permeation chromatography. The homo- and copolymer of maleimide showed single-stage decomposition (ranging from 300-580 degreesC). The initial decomposition temperatures of poly[N-(phenyl)maleimide] [poly(PM)], poly[N-4-(methylphenyl)maleimide] [poly(MPM)] and poly[N-3-(chlorophenyl)maleimide] [poly(CPM)] were higher compared to those of the copolymers. Heat-resistant adhesives such as blends of epoxy resin with phenyl-substituted maleimide-co-glycidy] methacrylate copolymers with improved adhesion property were developed. Different adhesive formulations of these copolymaleimides were prepared by curing with diethanolamine at two different temperatures (30 degreesC and 60 degreesC).