Effect of magnesium hydroxide fly ash compounded flame retardant on the properties of polyvinyl chloride

Abstract

This study investigated the effects of compound flame retardants on polyvinyl chloride (PVC) film. Four F-M/PVC composite film materials (F0.1M0.1/PVC, F0.1M0.2/PVC, F0.1M0.3/PVC, and F0.1M0.4/PVC) were obtained by blending different ratios of fly ash (FA) and magnesium hydroxide (MH(OH)2, MH) compounded flame retardants (F-M) with PVC. The mechanical properties, thermal stability, and smoke density of the composite film materials were examined. The results showed that the loss of mechanical properties of F0.1M0.2/PVC composites was small. TGA analysis showed that the thermal stability of the four F-M/PVC composites was improved. The degradation temperature of pure PVC at T50 was 286.5°C, and that of F0.1M0.2/PVC composites was 335.38°C. Smoke density analysis showed that the maximum smoke density of pure PVC was 6.310, and the maximum smoke density of the composite material (F0.1M0.4/PVC) was reduced to 5.960, which had a better smoke suppression effect. For the comprehensive utilization of Salt Lake magnesium resources, the development of PVC composite film materials to provide the experimental basis has a strong practical value.