AbstractMiscible blends from plasticized poly(vinyl chloride), and epoxidized natural rubber having 50 mol epoxidation level were prepared in a Brabender Plasticorder by the melt‐mixing technique. Changes in Brabender torque and temperature, density, dynamic mechanical properties, and differential scanning calorimetry of the samples were examined as a function of blend composition. The plasticized poly(vinyl chloride)/epoxidized natural rubber blends behaved as a compatible system at all composition ranges as evident from their single glass‐rubber transition temperature (Tg) obtained from dynamic mechanical analysis as well as from differential scanning calorimetry. Profound changes in the nature of the glass‐rubber transition were noted with respect to blend composition. TheTg‐width values of blends lie between those of plasticized poly(vinyl chloride) and epoxidized natural
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