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Synthesis of unsaturated polyester resins for large sized composites
Author(s) -
AbdelAzim A. A.,
Mahmoud B. H.,
Farhat M. S.
Publication year - 1994
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.1994.220050505
Subject(s) - materials science , diethylene glycol , triethylene glycol , phthalic anhydride , curing (chemistry) , maleic anhydride , ethylene glycol , polyester , styrene , monomer , polymer chemistry , composite material , organic chemistry , polymer , copolymer , chemistry , catalysis
A series of unsaturated polyesters based on phthalic anhydride (PHA), maleic anhydride (MA), ethylene glycol (EG), diethylene glycol (DG), triethylene glycol (TG), propylene glycol (PG), styrene (Sty) and acrylonitrile (AN) were prepared. The molecular weights of the prepared polyesters were determined by end‐group analysis. The effect of the structure of the resin on its curing behavior has been investigated. On the basis of the experimental study, the following were concluded: (1) The maximum curing temperature (T max ) is related to the molecular weight of the glycol incorporated in these castings. In this context the T max was found to decrease with increasing the molecular weight. Meanwhile the time to peak temperature t max was increasing. (2) The higher the percentage of AN in the crosslinking monomer system, the slower a resin cures. (3) The values of T max were found to be influenced to a large extent by the percentage of AN.