Copolymerization of N-vinylformamide and Acrylonitrile

N-vinylformamide(NVF) and acrylonitrile (AN) copolymers were prepared via free radical solution copolymerization in the presence of azodiisobutyronitrile(AIBN) as an initiator.The effect of monomer ratio,monomer concentration,initiator concentration,reaction temperature and time on the monomer's conversion and intrinsic viscosity were investigated.The structure of copolymers was characterized by FTIR.The study of the combination of kinetics and intrinsic viscosity revealed the copolymerization according with an alternating copolymerization mechanism.The results show that there is not obvious induction period in the copolymerization and reaction goes along evenly till the conversion up to 30%.Obvious autoacceleration phenomenon was not observed in the copolymerization.