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Effects of thermoplastic additives on the cure of unsaturated polyester resins
Author(s) -
Hsu C. P.,
Kinkelaar M.,
Hu P.,
Lee L. James
Publication year - 1991
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760312003
Subject(s) - materials science , thermoplastic , curing (chemistry) , microstructure , shrinkage , composite material , polyester , unsaturated polyester
Thermoplastic additives tend to promote the phase separation during the reaction of unsaturated polyester resins. Consequently, they reduce the amount of shrinkage during curing. Several thermoplastic additives which resulted in significant different microstructure of cured resins were investigated. The effects of microstr acture formation on the sol‐gel transition, reaction kinetics, and gelation time were studied. The mechanism of microstructure formation and causes of macro‐gelation were explained by the influence of thermoplastic additives on the particle formation rate and inter‐particle reaction rate during curing.