Solvent activity changes and phase separation during crosslinking of coating films

Changes in solvent activity and thermodynamic stability of a system undergoing crosslinking in the presence of a solvent are modeled by combination of branching theory with thermodynamics of polymer solutions and swelling of a crosslinked polymer. The system is considered as a quasiternary one in wh...

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Bibliographic Details
Published in:Macromolecular symposia. 2003-08, Vol.198 (1), p.259-270
Main Authors: Duskova-Smrckova, Miroslava, Dusek, Karel, Vlasak, Petr
Format: Article
Language:English
Subjects:
Crosslinking
Networks
Oligomers
Phase separation
polymer-solvent interaction
solvent activity
Solvents
Stability
Swelling
Thermodynamics
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Summary:Changes in solvent activity and thermodynamic stability of a system undergoing crosslinking in the presence of a solvent are modeled by combination of branching theory with thermodynamics of polymer solutions and swelling of a crosslinked polymer. The system is considered as a quasiternary one in which the solvent, polydisperse soluble polymer (sol) and crosslinked network, respectively, represent the components. Crosslinking brings about growth of polymer structures but also changes in polymer‐solvent interactions. The results are compared with onset of phase separation and changes in evaporation rates from films formed from a hydroxy‐functional star oligomer and triisocyanate.
ISSN:1022-1360
1521-3900
DOI:10.1002/masy.200350822