聚氟乙烯薄膜成型过程中结晶行为研究  

Research on Crystallization Behavior of PVF Film during Processing

作　　者：夏文广[1] 苑会林[1] 王婧[1] 邵晶鑫[1] 

机构地区：[1]北京化工大学新型高分子材料的制备与加工北京市重点实验室,北京10029

出　　处：《塑料工业》2008年第7期31-33,共3页China Plastics Industry

摘　　要：采用流延法制得的聚氟乙烯薄膜在不同的水浴温度下冷却,用X射线衍射法表征薄膜样品的结晶度并将薄膜样品在不同的温度下进行溶剂脱除实验,获得了溶剂脱除速率曲线。结果表明:水浴冷却温度越高则薄膜的初始结晶度越高;薄膜初始结晶度越低则溶剂脱除速率就越快;溶剂在脱除过程中,薄膜的结晶度会增加,结晶度的增加同时也会降低溶剂的脱除速率。PVF film prepared by means of extruding casting was cooled in water bath at different temperature, the crystallinity of the film sample was tested by XRD, the desolvation of the PVF film was made at different given temperature and got the curves of the desolvation rate. The results showed the higher the cooling temperature of water bath, the higher the initial crystallinity would be; the lower the initial crystallinity of film, the faster the desolvation rate would be; the crystallinity of film would increase during the desolvation, and the increase of the crystallinity would decrease the desolvation rate simultaneous.

关 键 词：聚氟乙烯 结晶度 薄膜 

分 类 号：TQ320.721[化学工程—合成树脂塑料工业]