Borate anions were intercalated into Zn - A1 LDHs and Zn - Mg - Al LDHs as precursors by an ion-exchange method and using water as dispersion media in acidic conditions. The model of LDHs precursors with BO42- instead of CO32- within interlamellar structure was investigated by XRD, FTIR and TG. In addition, LDHs precursors and borate-intercalation LDHs above mentioned were adopted to add into the soft PVC by co-mixing modification method. The thermal property and LOI of modified soft PVC were tested and the effect of LDHs and boate-interalation LDHs on the thermal property, flame retardant property and mechanics properties of soft PVC was studied. The results showed that borate-intercalation LDHs could enhance the synergisms of LDHs and beren-based flame retardant agent effectively and was better than the flame retardant property of carbonate LDHs.%以Zn-Al水滑石和Zn-Mg-Al水滑石为前体,在酸性条件下,以水为分散介质,由离子交换法分别制备相应的硼酸根插层水滑石,通过采用X射线衍射(XRD)、傅立叶变换红外光谱(FTIR)、热失重(TG)分析等测试方法进行测试和表征,确定了硼酸根取代水滑石前体层间结构中的CO32-模型.此外,采用上述水滑石前体和硼酸根插层的水滑石添加到软质聚氯乙烯(PVC)中进行共混改性,测试改性的软质PVC的热性能和氧指数,研究水滑石和硼酸根插层的水滑石对软质PVC的热性能、阻燃性能及力学性能的影响.结果表明,在相同的添加量下,硼酸根插层水滑石可有效地发挥水滑石与硼系阻燃剂的协同效应,优于碳酸根水滑石前体的阻燃性能.
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