Abstract
Flame retardant Zn2SnO4 were prepared through the method of precursor calcinations with SnCl4, Zn(NO3)2 and NaOH as raw materials and activated carbon as template. Zn2SnO4 as flame-retardants and smoke suppressants for flexible poly (vinyl chloride) were characterized by the limiting oxygen index test (LOI), smoke density test (SDR) and the char yield test. The mechanical properties of modified PVC were also studied. The results showed when 20phr Zn2SnO4 was used, PVC showed excellent flame retardant and smoke suppression, LOI, SDR and char yield was 37.9%, 84.5%, 29.8%, respectively, tensile strength was 21.52MPa, elongation was 246%. The thermal degradation of modified PVC were studied by differential thermal analysis, thermogravimetry and scanning electron microscope. The results demonstrated that Zn2SnO4 can be used as a highly effective flame retardant for flexible PVC. Keywords-flame retardant; Zn2SnO4; activated carbon; poly (vinyl chloride); smoke suppression; thermal analysis
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