Effect of Post-Cure and Antimony Trioxide Addition on the Glass Transition ofPolyester and Vinyl Ester Resin Systems

摘要

The effect of post-curing on the glass transition temperature (Tg) of a varietyof styrene cross-linked polyester and vinyl ester resins was determined by monitoring the changes to Tg using a Differential Scanning Calorimeter. The effect of adding the inorganic fire-retardant, antimony trioxide, on the Tg of these resin systems was also investigated. Results indicated that the effect of post-curing was to increase the amount of cross-linking of the polyester and vinyl ester resins, as evident by the beneficial increase in the glass transition temperature and changes to the storage modulus. The addition of up to 10 parts per hundred resin (phr) of the fire-retardant, antimony trioxide, had a negligible effect on the onset of the glass transition point.