Thermodynamic evolution of unsaturated polyester-styrene-hyperbranched polymers

SummaryThe free energy of mixing during cure has been modeled for different blends of linear unsaturated polyester, styrene and allyl ether functional hyperbranched polymers. The molecular weight of the blend components has been implemented as measured by gel permeation chromatography (GPC) into the...

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Bibliographic Details
Published in:Polymer bulletin (Berlin, Germany) Germany), 2001-06, Vol.46 (5), p.419-426
Main Authors: MEZZENGA, Raffaele, PETTERSSON, Bo, MANSON, Jan-Anders E
Format: Article
Language:English
Subjects:
Applied sciences
Chemical properties
Enthalpy
Exact sciences and technology
Free energy
Gel chromatography
Mathematical models
Molecular weight
Phase separation
Polymer blends
Polymer industry, paints, wood
Polymers
Properties and testing
Styrenes
Technology of polymers
Thermodynamics
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Summary:SummaryThe free energy of mixing during cure has been modeled for different blends of linear unsaturated polyester, styrene and allyl ether functional hyperbranched polymers. The molecular weight of the blend components has been implemented as measured by gel permeation chromatography (GPC) into the Flory-Huggins equation. This approach enables the distinction to be made between the contributions of enthalpy and entropy of mixing, the latter being automatically followed during curing by the development of average molecular weights. The model allows gaining an idea of the factors acting as driving forces for chemically induced phase separation in these blends.
ISSN:0170-0839
1436-2449
DOI:10.1007/s002890170051