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Relationships between polymerization activating systems and viscoelastic properties of the subsequent polyurethane/poly( tert ‐butyl acrylate) interpenetrating polymer networks
Author(s) -
Widmaier JeanMichel,
Drillières Sophie
Publication year - 1997
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(19970214)63:7<951::aid-app16>3.0.co;2-u
Subject(s) - polyurethane , viscoelasticity , polymerization , materials science , polymer chemistry , acrylate , polymer , butyl acrylate , polymer science , chemical engineering , composite material , copolymer , engineering
To date, most interpenetrating polymer networks (IPNs) are developed for slow processes such as casting or coating. For industrial manufacturing, fast‐reactive polymer processing is often required. Simply increasing the amount of catalyst and/or free‐radical initiator shows some limitations. Also, increasing too much temperature may cause degradation or side reactions. For polyurethane/polyacrylate IPNs, more or less simultaneous formation of the two networks, with over 97% conversion was obtained after 4 to 6 min at 110°C, using appropriate catalyst/initiator combinations. Depending on the relative kinetics of network formation, either one, two, or multiple transitions were found for a given composition. Kinetics of formation and phase behavior have been investigated by Fourier transform infrared spectroscopy and dynamic mechanical analysis. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 63: 951–958, 1997