耐水性氯化镁改性聚乙烯醇薄膜的制备

摘要

The plasticized poly(vinyl alcoho1)(PVAL) films were prepared by the tape casting and using magnesium chloride as the plasticizer. The effects of the magnesium chloride dosage,the reaction temperature,the reaction time,the drying temperature on the water resistance of modified PVAL film were studied. The results show that the water resistance of the film is the best when the mass ratio of magnesium chloride and PVAL is 0.2,the reaction temperature is 70℃,the reaction time is 40 min,the drying temperature is 70℃.%以氯化镁为增塑改性剂，采用流延法制备了增塑改性聚乙烯醇薄膜(PVAL)。主要研究了氯化镁用量、反应温度、反应时间、干燥温度对改性PVAL薄膜耐水性能的影响。结果表明，当氯化镁与PVAL的质量比为0.2、反应温度为70℃、反应时间为40 min、干燥温度为70℃时，所得改性PVAL薄膜的耐水性能最好。