热处理对聚乙烯醇薄膜性能的影响  

Influence of Heat Treatment on the Properties of PVA Film

作　　者：康智勇[1] 刘万蝉[1] 项爱民[1] 赵启辉[1] 

机构地区：[1]北京工商大学材料科学与工程系,北京100037

出　　处：《中国塑料》2006年第11期71-75,共5页China Plastics

摘　　要：通过改变热处理温度和处理时间研究了热处理条件对聚乙烯醇薄膜性能的影响。结果表明,聚乙烯醇吹塑薄膜经热处理后结晶度增大。薄膜在130℃下热处理300s后,室温下水溶时间由未处理的1297s延长至2841s,增加119．04%；失重率增大4．6%；拉伸强度由未处理的23．86MPa增大至73．25MPa,提高207．00%,同时,断裂伸长率由未热处理的255%下降到100%,下降了60．78%；透光率由未处理的91．9%下降到88．5%,下降了3．70%。The effect of heat treatment on the properties of PVA film was studied. It indicated that the heat treatment increased the degree of crystallinity of PVA. After a heat treatment at 130 ℃ for 300 s, the water soluble time increased from 1 297 s to 2 841 s, weight loss rate increased 4.6 %, its tensile strength increased from 23.86 MPa to 73.25 MPa, elongation at break reduced from 255 % to 100 %, transmittance reduced from 91.9 % to 88.5 %.

关 键 词：水溶性聚乙烯醇 吹塑薄膜 热处理 结晶度 

分 类 号：TQ320.721[化学工程—合成树脂塑料工业]