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Kinetics of copolymerization of acrylonitrile (AN) with N-vinylpyrrolidone(NVP) initiated by azodi-isobutyronitrile(AIBN)was in vestigated in H2O/dimethyl sulphoxide (DMSO)mixture between 50℃ and 70℃ under N2 atmosphere,The rate of copolymerization and pa