Mechanical and thermo-gravimetric properties of unsaturated polyester resin blended with FGD gypsum

A major disadvantage of polymeric materials is their flammability and generation of toxic gases under fire. Mechanical and thermo-gravimetric properties of an unsaturated polyester resin blended with Flu-Gas Desulfurization (FGD) gypsum were assessed. Limited open flame tests were also performed. Results indicate that ambient mechanical properties of polyester resin can be enhanced with up to 50% FGD gypsum content. TGA results show significant improvement in mass retention proportional to gypsum content. Under direct fire, FGD gypsum can form a protective physical barrier on the resin's exterior surfaces. FGD gypsum can potentially be an effective and low-cost fire-resistance additive for polymers.