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Synthesis and Surface Property of Siloxane-modified Aqueous Polyurethane
Zhou Cheng,Zhang Xingyuan*,Dai Jiabing,Zhang Heping
Author NameAffiliationE-mail
Zhou Cheng State Key Laboratory of Fire Science,Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei230026  
Zhang Xingyuan* Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026 zxym@ustc.edu.cn  
Dai Jiabing Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026  
Zhang Heping State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026  
Abstract:
A series of novel aqueous emulsion of siloxane modified polyurethane (PU(PE-PSI)) were synthesized based on poly(propylene glycol) (PPG), polyether-grafted polysiloxane (PE PSI), 2,4-tolylene diisocyanate (TDI), dimethylol propionic acid (DMPA) and 1,4 butanediol (BDO) through a direct water emulsification of triethylamine (TEA). The aqueous emulsion was transparent and had a good stability. Fourier transform infrared spectroscopy (FTIR) was used to identify the structure of PU (PE PSI), indicating that the polysiloxane segment had been incorporated with polyurethane chain. Investigation of Electron Spectroscopy for Chemical Analysis (ESCA) and the water contact angle demonstrated that the siloxane migrated to the surface of film. The results also showed that PU(PE-PSI) was still a very good elastomer. With increasing the content of PE PSI, the resistance to water improved and tensile strength increased, while the ultimate elongation decreased slightly for the PU(PE-PSI) film.
Key words:  Siloxane-modify, Aqueous polyurethane, Surface property
FundProject:
硅氧烷改性水性聚氨酯的制备及性能
周成,张兴元*,戴家兵,张和平
摘要:
用聚氧化丙烯二醇、聚醚接枝聚硅氧烷、甲苯二异氰酸酯、二羟甲基丙酸和1,4-丁二醇进行聚合,并通过三乙胺直接水乳化法合成了一种新型硅氧烷改性的透明且稳定性好的水性聚氨酯乳液.用Fourier变换红外光谱、化学分析电子能谱、接触角仪、电子拉力试验机以及乳液稳定性测试对其进行研究,测试表明乳液稳定性好,聚硅氧烷链段已被化学键入聚氨酯分子链中,硅氧烷在乳胶膜表明富集,对聚氨酯材料有明显的表面改性作用.研究结果还表明,经少量硅氧烷改性的聚氨酯材料本体的力学性质变化不大,仍然是一种很好的弹性体.随着硅氧烷含量的增加,
关键词:  硅氧烷  改性  水性聚氨酯  表面性能
DOI:10.1088/1674-0068/18/3/448-452
分类号: