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Phase reversal during water dispersion of polyurethane anionomer
Author(s) -
Dang Xiaorong,
Yuan Qiaolong,
Fang Jiezhu,
Wang Dening
Publication year - 2005
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.22606
Subject(s) - adipate , dispersion (optics) , isophorone diisocyanate , polyurethane , materials science , polymer chemistry , phase (matter) , viscosity , hydrogen bond , mass fraction , chemistry , nuclear chemistry , chemical engineering , analytical chemistry (journal) , composite material , chromatography , organic chemistry , physics , molecule , optics , engineering
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. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 1234–1239, 2006