亲水链段链长对聚氨酯薄膜透气性能的影响  

Influence of Hydrophilic Segment Chain Length on Water-vapor Permeability of Polyurethane

作　　者：刘燕[1] 石欢欢[1] 范浩军[1] 芦燕[1] 

机构地区：[1]四川大学皮革化学与工程教育部重点实验室,四川成都610065

出　　处：《中国皮革》2007年第13期9-12,共4页China Leather

基　　金：教育部新世纪优秀人才资助项目(NCET-05-0782)

摘　　要：利用不同分子链长的聚乙二醇PEG300(分子质量300,下同)、PEG400、PEG600、PEG1000和PEG1500,合成了一系列新型的聚氨酯。探讨了聚乙二醇(PEG)亲水链段的分子链长,对聚氨酯薄膜表面接触角、透气性、吸水率和力学性能的影响。结果表明:随着PEG分子链的增长,合成的聚氨酯薄膜的表面接触角、吸水率、透气性和断裂伸长率增加,但是抗张强度却有所降低。A series of novel polyethylene glycol - based polyurethanes were prepared by several polyethylene glycols with different molecular chain lengths. The influence of hydrophilic segment chain length of the polyethylene （PEG） on contact angle, water - vapor permeability, water - absorbing capacity and mechanical properties of polyurethane film was investigated. The resuits indicate that with the increase of the PEG chain, the contact angle, water - vapor permeability, water - absorbing capacity and the broken elongation of PU film enhance, while the tensile strength of PU film decreases.

关 键 词：聚氨酯 透气性 亲水链段 分子链链长 聚乙二醇 

分 类 号：TQ320.721[化学工程—合成树脂塑料工业]