聚丙烯/低温可膨胀石墨阻燃复合材料的性能研究

采用低温可膨胀石墨(LTEG)作为阻燃剂,制备了聚丙烯基阻燃复合材料。研究了聚丙烯/LTEG阻燃复合材料的阻燃性能、热性能、剩炭结构和力学性能。研究发现,采用LTEG为阻燃剂的聚丙烯基阻燃复合材料具有优异的阻燃性能,LTEG质量分数为15%时,复合材料氧指数已达27%。聚丙烯/LTEG复合材料的热失重温度低,在燃烧过程中并没有形成理想致密的炭层。LTEG对聚丙烯具有增强作用,随着其用量的增加,复合材料的拉伸强度增加,断裂伸长率不断下降。

Study of Property of PP/Low-temperature Expandable Graphite Flame Retardant Composite

With low-temperature expandable graphite(LTEG)as flame retarded agent,a novel PP based com- posite was prepared.The flame retardancy,thermal behavior,residual carbon structure and mechanical properties of PP/LTEG composite were studied.The result showed the composite with LTEG as flame retardant agent had superior flame retardance.When the mass fraction of LTEG was 15%,the oxygen index of the composite was as high as 27%.The PP/LTEG composite had a low thermal loss weight temperature,and had no perfect compact carbon layer formed during burning process;the addition of LTEG had reinforcing action on the composites,and with the in- crease of the content of LTEG,the tensile strength of the composites increased,while the elongation at break de- creased gradually.