Abstract
Copolymers of N-p-tolylmaleimide, methyl methacrylate, and acrylonitrile were synthesized by the semibatch emulsion polymerization method and used for blending with poly(vinylchloride) (PVC) to improve its heat resistance. The thermal properties of the blends with different terpolymer content were investigated by differential scanning calorimeter (DSC), thermogravimatric analysis (TGA), and Vicat softening point tester (TVicat). The results showed that the glass transition temperature (Tg), Vicat softening point, and thermal decomposition temperature of the blends increased with increasing terpolymer content. The tensile strength increased with an increase in the copolymer content. The results of the rheological behavior showed that the apparent viscosity ŋα decreased with increasing shear rate and increased with the copolymer content.
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