聚酯聚氨酯分散体的制备与结构表征.pdfVIP

化学通报 2003 年 第66 卷 w064 聚酯-聚氨酯分散体的制备与结构表征 1,2 1 1 周 铭 侯翠红 蒋登高 1 2 ( 郑州大学化工学院 郑州 450002 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H O 参与 扩链聚合物的起始分解温度远高 2 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 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 H O. 2 Key words Polyester-polyurethane dispersion, Preparation, Surface pattern, Thermo-stability 水性聚氨酯的卓越的机械性能 加上所具有的环保优势正受到国内外材料科学界的重视[1] 目前对水性聚氨酯的研究从多元醇的结构来说正集中在