【摘要】 以聚乙烯醇1788(PVA)作为原料,以丙三醇为增塑剂,加入0%~2.5%的淀粉,对水转印PVA膜进行了改性研究。结果表明,加入淀粉后,PVA溶液的粘度增大,膜的溶解时间变长,水上伸长率变小,含水率变小,扯断强度增强,形变缩小;通过膜表面观察,发现淀粉在膜中以聚集颗粒状态存在。研究发现,在淀粉加入PVA后使水转印膜的水溶性得到很大改善。更多还原

【Abstract】 In this paper,the modification of water transfer PVA sheet was investigated through the addition of 0%～2.5% starch,with the polyvinyl alcohol 1788(PVA) as raw materials and glycerin as plasticizer.The results showed that after the adding starch to the sheet,the viscosity of the PVA solution increased,the dissolution time of the sheet got longer,the rate of enlargement in water was smaller,the rate of moisture became smaller,stretch intensity enhanced and the change of shape diminished;also it could be seen from the surface of sheet that the starch existed in PVA sheet as the shape of conglomerating particle.Though research,it has been found that the water solubility of water transfer sheet has been improved obviously,after adding the starch to the PVA sheet.更多还原