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Phase behavior and structure formation in ternary blends: studies on blends of PVDF/PMMA/PVAC
Author(s) -
Classen S.,
Vogt M.,
Wendorff J. H.
Publication year - 1995
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1995.220060905
Subject(s) - ternary operation , materials science , phase diagram , thermodynamics , methyl methacrylate , phase (matter) , polymer blend , crystallization , binary number , ternary numeral system , vinyl acetate , lattice (music) , chemistry , polymer , polymer chemistry , polymerization , organic chemistry , composite material , copolymer , physics , arithmetic , mathematics , computer science , acoustics , programming language
The phase behavior of ternary blends was analyzed on the basis of the lattice approach. Both compatibilization and incompatibilization effects are predicted to occur depending on the relative magnitudes and the sign of the interaction parameters of the binary subsystems. Thermodynamic, structural and kinetic properties were investigated for a ternary model blend composed of poly(vinylidene fluoride), poly(methyl methacrylate) and poly(vinyl acetate). This particular ternary system is characterized by a specific symmertry with respect to the interactions in the binary subsystems. This symmetry affects both thermodynamic and structural properties. The experimentally determined interaction parameters were used to model the phase diagram on the basis of the lattice model: the theoretical phase diagram was found to be close to the experimental one. The crystallization processes were analyzed both for the binary and the ternary systems on the basis of a modified Turnbull–Fisher equation. The conclusions are that the properties of the ternary systems can be understood to a first approximation on the basis of those of the corresponding binary systems and the symmetry of the interactions.