Preparation and Structure Characterization of Polyester-polyurethane Dispersion

Zhou Ming, Hou Cuihong, Jiang Denggao
(College of Chemical Engineering, Zhengzhou University, Zhengzhou 450002)

Abstract Polyester-polyurethane dispersion was prepared with the raw material of elastic hexaester synthesized by the reaction of adipic acid and glycol .The film pattern and structure were studied by FT-IR and SEM, the experimental results indicated that film pattern of the dispersion varied with the index of isocyanate. With the increment of index of isocyanate, the film surface was becoming fish-scale like gradually. Thermo-stability of the dispersion was also studied, its DSC, TG/DTG curves proved that the film decomposition temperature was higher than that of conventional solvent-based polyurethane owing to the chain extension of the participation of H2O.
Key words Polyester-polyurethane dispersion, Preparation, Surface pattern, Thermo-stability

　

聚酯-聚氨酯分散体的制备与结构表征

周铭1,2 侯翠红1 蒋登高1
(1郑州大学化工学院 郑州 450002 2中化建常州涂料化工研究院 江苏常州 213016)

摘要 采用由己二酸与乙二醇合成的弹性己酯为原料制备了聚酯-聚氨酯分散体，并用傅立叶红外光谱、扫描电镜对成膜物的表面形态和结构进行研究，发现分散体的成膜物形态随聚合物异氰酸酯指数的变化而变化。随异氰酸酯指数增大，成膜物表面逐渐呈现鱼鳞斑状。并研究了聚酯聚氨酯聚合物的热稳定性，其DSC、TG/DTG分析表明由于H2O参与，扩链聚合物的起始分解温度远高于传统的溶剂型聚氨酯材料。
关键词 聚酯-聚氨酯分散体 制备 表面形态 热稳定性

周铭 男，40岁，博士生，现从事高分子的合成及其在涂料中的应用。
河南省科技攻关重点项目
2002-12-09收稿，2003-02-12修回

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