采用化学沉淀法合成了纳米羟基锡酸锌(ZHS),然后以纳米ZHS为无机核,以三聚氰胺-甲醛树脂(MF)为有机壳层,构筑了一种新型的ZHS-MF复合阻燃剂,并将其用作软质聚氯乙烯(PVC)的阻燃添加剂进行了阻燃性能研究.XRD、TEM、FTIR、TG测试结果表明,所制备的产物为MF包覆ZHS的复合结构,ZHS质量分数约为35％.极限氧指数(LOI)测试结果表明,随着阻燃剂ZHS-MF添加量的增加,PVC的LOI逐渐上升,由纯PVC的23.8％上升到29.6％,表明ZHS-MF对PVC具有很好的阻燃效果.在相同LOI条件下ZHS-MF中ZHS实际含量比实际需要的ZHS明显减少,说明MF的包覆层与ZHS起到了协同阻燃作用.烟密度等级(SDR)测试结果表明,在ZHS-MF添加量为15％时,经MF包覆的ZHS对PVC的抑烟性能优于未包覆的ZHS,说明MF的包覆层与ZHS起到了协同抑烟作用.
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