文献类型：期刊文献

英文题名：Preparation and properties of well-defined waterborne polyurethaneurea with fluorinated siloxane units in hard or soft segments

作者：Su, Teng[1,2]; Wang, Gui You[1,2]; Hu, Chun Pu[1,2]

机构：[1]Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2007

卷号：45

期号：21

起止页码：5005

外文期刊名：JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY

收录：;EI(收录号：20074310890436);WOS:【SCI-EXPANDED(收录号:WOS:000250609400024)】；

语种：英文

外文关键词：dispersions; fluorinated polysiloxanes; ionomers; mechanical properties; phase separation; polyurethaneurea; surface properties; water resistance

摘要：Two series of well-defined polyurethaneurea (PUU) aqueous dispersions consisting of fluorinated siloxane units in the hard and the soft segments, respectively, were prepared from polyester polyol, alpha,omega-dihydroxypoly[(3,3,3-trifluoropropyl) methylsiloxane] (PTFPMS), dimethylolpropionic acid, isophorone diisocyanate, and ethylenediamine. These anionic aqueous dispersions were stable at the ambient temperature for more than 6 months. The experimental results showed that the water-resistance performance of the PUU films prepared with the insertion of PTFPMS units into the hard segments (HFS series) were better than those prepared with the insertion of PTFPMS units into the soft segments (SFS series). The film prepared from the PUU aqueous dispersion incorporating 5 wt % PTFPMS in the hard segments exhibited the lowest water absorption amount (2.3 wt %) with the contact angle of water on the film surface greater than 90 degrees. In comparison with the PLTU film without adding PTFPMS, the waterproof performance and the mechanical properties of both HFS and SFS series were enhanced markedly. (c) 2007 Wiley Periodicals, Inc.