文献类型：期刊文献

英文题名：Phase reversal during water dispersion of polyurethane anionomer

作者：Dang, Xiaorong[1]; Yuan, Qiaolong[1]; Fang, Jiezhu[1]; Wang, Dening[1]

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

年份：2006

卷号：99

期号：3

起止页码：1234

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：2006139785375);WOS:【SCI-EXPANDED(收录号:WOS:000234320400079)】；

语种：英文

外文关键词：polyurethane; aniomomer; phase reversal; waterborne coating

摘要：A series of polyurethane anionomers (PUas) was synthesized from isophorone diisocyanate, polyneopentanediol adipate (P756), and hydrophilic dimethanol propionic acid (DMPA). The variation of electric conductivity and viscosity of such anionomers during water dispersion was followed. The results showed that the average diameter and polyindex of particles were reduced, the viscosity of dispersion was lowered, the time necessary for phase reversal became shorter, if the amount of DMPA or the temperature, at which the water dispersion was carried out, increased. DSC test revealed that the order of hard segments was disturbed after water dispersion. IR spectra demonstrated that, after the chain extender ethyl diamine was added into the PUa dispersion, the hydrogen bonding of NH with carbonyls was stronger, if the dispersion temperature and the mass fraction of DMPA increased. (c) 2005 Wiley Periodicals, Inc.