Kinetics of Copolymerization of Acrylonitrile with N-Vinylpyrrolidone in H_2O/Dimethyl Sulphoxide Mixture

摘要

Kinetics of Copolymerization of acrylonitrile(AN) with N-vinylpyrrolidonc(NVP) initiated by azodi-isobutyronitrile(AIBN) was investigated in H_2O/dimethyl sulphoxide(DMSO) mixture between 50℃ and 70℃ under N2 atmosphere. The rate of Copolymerization and particle size were measured respec ,ively. The kinetic equation of Copolymerization system is obtained as R_p ∝ c_(AIBN)~(0.651+-0.123)c_(AN)~(1.59+-0.35)c_(CVP)~(1.17+-0.14) at 60℃. The overall activation energy for Copolymerization system was computed as 87.3kJ·mol~(-1). Effect of additives oi hydroquinone and dioxane on Copolymerization was discussed. The polymerization is retarded by hydroquinone and accelerated by dioxane, which confirms the free radical Copolymerization of AN with NVP.