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聚醚型聚氨酯的结构及其防水透湿特性 被引量:1

Study on the structure of polyether polyurethane and its waterproofing & breathable properties
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摘要 采用2步法聚合工艺,以4,4′-二苯基甲烷二异氰酸酯(MDI)为硬单体,聚四氢呋喃二醇1 000(PTMG 1 000)和聚乙二醇1 000(PEG 1 000)为软单体,1,4-丁二醇(BDO)为扩链剂,制备了一系列聚醚嵌段共混型高透湿聚氨酯涂层剂.研究了聚氨酯材料的微相区及化学结构与其防水性、透湿性、亲水性及玻璃化温度Tg间的关系.结果表明:聚氨酯软链段的化学结构、组成以及质量分数及软段相区与硬段相区间的微相分离程度即微相区结构对其防水透湿性能的影响较大;在一定范围内,硬链段的结构对聚氨酯的性能影响并不明显. With two-step polymerization technique, a series of polyether blocked blend polyurethane coating agent with high moidture permeability were prepared using 4,4'-diphenylmethane diisocyanate (MDI) as hard monomer, polytetramethylene glycol 1 000 (PTMG 1 000) and polyethylene glycol 1 000 (PEG 1 000) as soft monoers with 1,4-butanediol (BDO) as the chain extender. The relationships between micro-phase, chemical structure and moisture permeability, water resistance, hydrophilic property and glass transition temperature T9 of the polyurethanes were investigated. The results showed that the chemical structure, composi- tion and micro-phase separate degree of hard segment domains and the soft segment had remarkable effect on the waterproofing and moisture permeability of polyurethane. In a certain range, the properties of polyurethane were almost not affected by its hard segment.
出处 《印染助剂》 CAS 北大核心 2012年第9期8-11,共4页 Textile Auxiliaries
基金 陕西省教育厅自然科学专项资助项目(04JK181) 中国纺织工业协会计划指导性项目(2007049) 广州市科技局科技攻关计划项目(2006Z3-D0421)
关键词 聚醚型聚氨酯 防水透湿 结构 性能 polyether polyurethane waterproofing and breathable structure property
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