文献类型：期刊文献

英文题名：Surface composition and property of film prepared with aqueous dispersion of polyurethaneurea-acrylate including fluorinated block copolymer

作者：Li, H; Zhang, ZB; Hu, CP; Wu, SS; Ying, SK

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2004

卷号：40

期号：9

起止页码：2195

外文期刊名：EUROPEAN POLYMER JOURNAL

收录：;EI(收录号：2004338310196);WOS:【SCI-EXPANDED(收录号:WOS:000223873900021)】；

语种：英文

外文关键词：surface property; polyurethaneurea-acrylate; aqueous dispersion; fluorinated block copolymer; carboxyl group

摘要：The aqueous dispersion of polyurethaneurea-acrylate (PUA) including small amount of fluorinated block copolymers containing carboxyl groups (PATF), which can be dissolved in water, was used to make films and the surface properties of these films were examined. The experimental data show that the modified PUA film exhibits a hydrophobic surface property, although the original surface of PUA film is hydrophilic. The surface composition of the modified PUA film was measured by ATR and XPS. The results indicate that there is a concentration gradient of the fluorine groups along the lines of thickness of the modified film and towards the outmost surface layer, resulting from the migration of fluorinated blocks to the air side surface of the modified PUA film during the film formation process. However, the PUA film can not be modified effectively by adding the sodium salt of PATF, since the urethane groups in the system are easy to occupy on the surface of the film. (C) 2004 Elsevier Ltd. All rights reserved.