【摘要】 采用熔融插层法制备了聚丙烯/膨胀型阻燃剂/有机蒙脱土(PP/IFR/OMMT)阻燃复合材料。探讨了OM-MT对PP膨胀阻燃体系的影响,通过X射线衍射(XRD)、极限氧指数、热重分析(TG)、力学性能测试对阻燃复合材料的阻燃性、热稳定性及力学性能进行了研究。结果表明,PP高分子链插层进入OMMT层间,形成了插层型复合材料。OMMT与IFR具有明显的协同阻燃性。OMMT添加量为2份时,复合材料的极限氧指数达到31%,较单独添加IFR时高出30%;与纯PP相比,复合材料残炭率明显提高。随着OMMT含量的增加,复合材料的拉伸强度、弯曲强度和冲击强度均呈现先上升后下降的趋势,当OMMT含量为3份、IFR含量为22份时,复合材料的拉伸强度、弯曲强度和冲击强度达到最大值。更多还原

【Abstract】 Polypropylene/intumescent flame retardant /organic montmorillonite(PP/IFR/OMMT) composites were prepared by direct melting intercalation.The synergistic flame retarding effect of OMMT and IFR was investigated.The composite was characterized by X-ray diffraction,limiting oxygen index,thermal analysis,etc.It was found that the layers of OMMT were intercalated by PP chain.There was a clear synergistic retarding effect between OMMT and IFR.When 2 phr of OMMT was introduced,the limiting oxygen index was 30 %,and the carbon residue increased obviously.With increasing contents of OMMT,the tensile strength,bending strength and impact strength of composites increased,and then decreased.When 3 phr of OMMT was introduced,the tensile strength,bending strength and impact strength of composites reached the maximum value.更多还原