【摘要】 用氧指数、剩炭率、烟密度等方法测试了锡酸锌包覆碳酸钙对PVC的阻燃作用,同时采用热分析、扫描电镜的方法研究了锡酸锌包覆碳酸钙的阻燃机理。实验表明在锡酸锌含量相同的情况下,锡酸锌包覆碳酸钙对PVC的阻燃和消烟性能优于锡酸锌;在添加量为10份时,锡酸锌包覆碳酸钙阻燃PVC样品和三氧化二锑阻燃PVC样品具有相同的氧指数,但当添加量为20份时,前者的氧指数比后者的高3%,前者的烟密度等级比后者低约10%。更多还原

【Abstract】 The effects of zinc stannate coated CaCO₃ on flame retardancy and smoke suppression of PVC were studied by means of LOI,char yield,and smoke density measurement;and the flame retardant mechanism was investigated by TG,DTA and SEM analysis.The results showed that the flame retardance and smoke suppression of zinc stannate coated CaCO₃ were better than those of zinc stannate when containing the equivalent level of zinc stannate.The PVC sample containing zinc stannate coated CaCO₃ and the PVC sample containing antimony trioxide showed a same LOI value when the additive level was 10 parts,but when the additive level was increased to 20 parts,the LOI value of the former was 3 percents higher than that of the latter,and the smoke density rank of the former was 10 percents lower than that of the latter.更多还原