PAN与硫氰酸根插层水滑石共混体系初探

Study on blending of polyacrylonitrile and thiocyanate intercalated layered double hydroxide

用硫氰酸根插层水滑石与PAN/NaSCN水溶液共混的方法制备了PAN-LDH聚合物,采用多种方法研究了共混体系的流动性能、样品的燃烧性能及结构特征。结果表明:样品的阻燃性能得到改善,极限氧指数从18%提高到了21%;共混前后溶液体系的流动性能很少变化;红外光谱和X-射线衍射分析结果显示样品的晶态有序性有所降低,部分聚丙烯腈大分子插入到了水滑石片层之间,这应该是提高PAN阻燃性能的主要原因。

PAN-LDH polymer was made through blending by thiocyanate intercalated layered double hydroxide （SCN^- -LDH） and polyacrylonitrile-sodium thiocyanate （PAN-NaSCN） aqueous solution. The flow property, flame retardance and structural features of the PAN-LDH were studied by utilizing various methods. The results showed that the flame retardant property of the sample was improved with LOI increasing from 18% to 21% ; the flow property of the solution system before and after blending exhibited little change; FT-IR and X-ray diffraction revealed that the crystalline order declined and PAN had been intercalated into the layer of the LDH, which should be the primary contribution to the improvement of the flame retardant property.