一种超支化聚氨酯薄膜的制备与性能研究  

Synthesis and Application Property Analysis of Hyperbranched Polyurethane Film

作　　者：卢先博[1,2] 王学川[3,2] 强涛涛[3] 郑郸[3] 

机构地区：[1]陕西科技大学化学与化工学院,陕西西安710021 [2]教育部轻化工助剂化学与技术重点实验室,陕西科技大学,陕西西安710021 [3]陕西科技大学资源与环境学院,陕西西安710021

出　　处：《中国皮革》2010年第13期29-32,共4页China Leather

基　　金：国家自然基金项目(20876090);博士点基金项目(20060708002);陕西科技大学研究生创新基金资助

摘　　要：以异佛尔酮二异氰酸酯(IPDI)和不同相对分子质量的聚乙二醇(PEG)为单体,通过逐步聚合反应合成了—NCO封端的聚氨酯预聚体(PPU);再通过接枝使PPU与端羟基超支化聚合物(HPAE)共聚反应,制备得到一系列软段相对含量不同的超支化聚氨酯(HBPU)薄膜。用X-射线衍射(XRD)分析了薄膜的结晶度,并用原子力显微镜(AFM)观察了薄膜的表面状态。对薄膜的耐溶剂性和机械性能进行了检测。结果表明:随着HBPU中软段相对含量的增加,薄膜的断裂伸长率上升,抗张强度下降,撕裂强度下降,耐溶剂性下降。The isocyanate - terminated polyurethane prepolymer was synthesized using monomer isophorone disocyanate with different relative molecular mass polyethylene glycol （PEG）, then copolymerized with hydroxyl -terminated hyperbranched poly- mer（HPAE） by graft to afford a series of hyperbranched polyurethane （HBPU） films. The crystallinity of film was characterized and analyzed by XRD, and the surface appearance of HBPU film was studied by tapping- mode atomic force microscopy（AFM）. The properties of HBPU film was studied. The solvent resistance and mechanical properties of the HBPU films were studied. The rusults indicate that with increase of soft segment in HBPU, their elongation at break are increased, ensile strength, solvent - resistant and ear strength are decreased.

关 键 词：超支化聚氨酯 薄膜 耐溶剂性 机械性能 

分 类 号：TQ630.7[化学工程—精细化工]