The effects of four processing modifiers including water,glycerine,polyethylene glycol and caprolactam on meltprocessing property of PVA were studied by melt flow rate testing machine.PVA films were prepared by flat sulphuration machine and the film-forming properties of different modified PVA systems were observed.The results indicated that these processing modifers improved the melt-processing property of PVA in varying degrees,among these,PVA modified by caprolactam had best melt-processing property.The ...