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Synthesis and properties of polyurethane modified with an aminoethylaminopropyl‐substituted polydimethylsiloxane. II. Waterborne polyurethanes
Author(s) -
Chen Hong,
Fan Quli,
Chen Dongzhong,
Yu Xuehai
Publication year - 2000
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 - 10.1002/1097-4628(20010110)79:2<295::aid-app110>3.0.co;2-4
Subject(s) - polyurethane , prepolymer , materials science , emulsion , polydimethylsiloxane , contact angle , fourier transform infrared spectroscopy , ultimate tensile strength , polymer chemistry , siloxane , chemical engineering , aqueous solution , thermal stability , composite material , polymer , chemistry , organic chemistry , engineering
A series of polyurethane (PU) emulsions modified with aminosilicone were synthesized, based on 2,4‐toluene diisocyanate (TDI), poly(tetramethylene oxide) (PTMO), and dimethylolpropionic acid (DMPA) as a prepolymer which was chain‐extended with aminoethylaminopropyl polydimethylsiloxane (AEAPS) in an aqueous emulsion. Their chemical compositions, structures, bulk and surface properties, and emulsion morphologies were investigated using Fourier transform infrared spectrum analysis (FTIR), tensile and surface contact angle measurements, electron spectroscopy for chemical analysis (ESCA), water swellablity, an emulsion stability test, and transmission electron microscopy (TEM). It was shown that the PU emulsions were stable and the siloxane chains were enriched on the PU surface. The water resistance of the PU film increased but the bulk tensile properties of the PU film were not changed significantly with a small amount siloxane modification up to 6 wt %. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 79: 295–301, 2001