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Solvent activity changes and phase separation during crosslinking of coating films
Author(s) -
DuškováSmrčková Miroslava,
Dušek Karel,
Vlasák Petr
Publication year - 2003
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200350822
Subject(s) - solvent , polymer , branching (polymer chemistry) , materials science , oligomer , swelling , polymer chemistry , phase (matter) , chemical engineering , polymer network , evaporation , coating , solvent effects , thermodynamics , chemistry , organic chemistry , composite material , physics , engineering
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.