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Imide‐modified polyurethanes, syntheses, thermal, and mechanical characteristics
Author(s) -
Radhakrishnan Nair P.,
Reghunadhan Nair C. P.,
Francis D. J.
Publication year - 1998
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/(sici)1097-4628(19981121)70:8<1483::aid-app7>3.0.co;2-0
Subject(s) - imide , polyurethane , polymer chemistry , materials science , glass transition , polyol , isocyanate , polybutadiene , diamine , polymer , polyethylene glycol , isophorone diisocyanate , chemistry , organic chemistry , composite material , copolymer
Polyurethanes based on polyethylene glycol and hydroxy‐terminated polybutadiene, bearing pyromellitimide groups in the backbone, were synthesised via a sequential method. The diisocyanate and diamine telechelic precursor polymers, the polyamic acid intermediate and the polyimides were characterized by physicochemical and thermoanalytical techniques. The imide content could be varied in the chain through selection of the polyol of desired molecular weight or by a chain extension process of the diisocyanate precursor. The thermal and mechanical properties of the imide‐modified polyurethane increased proportionate to the hard segment content, constituted by the imide and the urea groups. The presence of the imide group resulted in better thermomechanical profile and caused enhancement in glass transition temperature of the modified polyurethane vis‐à‐vis the unmodified resin. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 70: 1483–1491, 1998