聚碳酸酯型水性聚氨酯的研究  

Study on Waterborne Polycarbonate Diols-based Polyurethane

作　　者：王全杰[1,2] 朱先义[1] 侯立杰[3] 蒋艳云[3] 杜丹华[1] 

机构地区：[1]陕西科技大学资源与环境学院,陕西西安710021 [2]国家制革技术研究推广中心,山东烟台264003 [3]烟台大学化学生物理工学院,山东烟台264005

出　　处：《皮革与化工》2009年第6期22-25,共4页Leather And Chemicals

基　　金：烟台市科技攻关项目(2006GGA000143)

摘　　要：以聚碳酸酯二醇(PCDL)和4,4'-二苯基甲烷二异氰酸酯(MDI)为主要原料合成水性聚碳酸酯型聚氨酯树脂(PCU)。研究了软段分子量、软段用量对PCU力学性能和微观相分离结构的影响。结果表明,随着软段用量的增加,PCU的断裂强度迅速下降,断裂伸长率也有所下降。但相同软段用量,随着分子量的增加,断裂强度非但没有下降,反而有所上升;断裂伸长率略有下降。同时聚碳酸酯二醇可以明显提高聚氨酯的耐黄变性。The aqueous polycarbonate polyurethane （PCU） resin is synthesized by polyearbonate diols（PCDL） and 4,4＇-diphenylmethane diidocyanate （MDI）. The influence of soft segment molecular weight, soft segment content on the mechanical performance and microscopic phase separation structure of PCU were studied in this paper. Results showed that with the increasing of soft segment usage, breaking strength of the PCU film quickly decreases and the elongation at break also decreases in some degrees. However, with the increasing of molecular weight, the breaking strength doesn＇t decrease, and the elongation at break decreases the yellowing index slightly. Results showed that PCDL-based PU was better than polyester polyol-based in the resistance to yellowing.

关 键 词：聚碳酸酯二醇 聚氨酯 4 4-二苯基甲烷二异氰酸酯 耐黄变性 

分 类 号：TQ630.1[化学工程—精细化工]