In this paper

the influences of solvents

monomer conncentration and initiator concentration on radical polymerization of N -vinylpyrrolidone(NVP) are investigated. Especially

benzene

ethanol

distilled water are experimented as solvents to investigate the influences of solvent polarities

viscosities of mixture of monomer and solvent on polymerization rate

chain propagation rate and relative molecular mass of polyvinylpyrrolidone. Furthermore

crosslinking polymerization properties of N -vinylpyrrolidone and N

N - methylenebisacrylamine(NNMP) are studied. It is found that a higher yield of crosslinking polyvinylpyrrolidone(PVPP) can be obtained in a aqueous solution of some inorganic salt. Some explanations are presented.