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Theoretical and experimental conversion in the curing of unsaturated polyester resins with styrene as a crosslinking agent
Author(s) -
Ramis X.,
Salla J. M.
Publication year - 1992
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/app.1992.070450203
Subject(s) - styrene , polyester , curing (chemistry) , unsaturated polyester , monomer , copolymer , materials science , polymer chemistry , gel permeation chromatography , polymer , composite material
The reaction of unsaturated polyester resin is a free radical copolymerization between the styrene monomer and the unsaturated polyester. Depending on the temperature and other processing conditions, some of the reacting molecular species remain, after curing, in the form of residual monomer and soluble polymer that do not contribute to the network structure. By means of DSC and gel permeation chromatography (G.P.C.) techniques, we have investigated the differences between theoretical and experimental reaction heats of unsaturated polyester samples with different styrene/polyester ratios, the residual species formed, and the conversion of reactive groups.