论文部分内容阅读
分别采用介孔分子筛SBA-15原位聚合及SBA-15负载催化剂六氯化钨原位聚合的方法制备了SBA-15/聚双环戊二烯(PDCPD)复合材料,研究了SBA-15/PDCPD复合材料的阻燃性能。研究结果表明:采用原位聚合方法制备的复合材料,SBA-15孔道中的双环戊二烯(DCPD)单体难以发生聚合反应生成PDCPD分子链,SBA-15易团聚,导致复合材料的阻燃性能没有明显改善;采用SBA-15负载催化剂原位聚合的方法制备的复合材料,在SBA-15孔道中大量生成PDCPD分子链。SBA-15的孔壁起到隔热作用,延缓介孔内聚合物分子链的热分解,使复合材料的热稳定性明显提高,水平燃烧速率下降,SBA-15与PDCPD的质量比为3∶100时,复合材料的极限氧指数由PDCPD的20.1增至21.7,表明SBA-15可提高PDCPD的阻燃性能。
SBA-15 / poly dicyclopentadiene (PDCPD) composites were prepared by in situ polymerization of mesoporous molecular sieves SBA-15 and in-situ polymerization of SBA-15 supported tungsten hexachloride, respectively. The effects of SBA-15 / PDCPD Flame-retardant properties of composite materials. The results show that the composite material prepared by in-situ polymerization, SBA-15 channel dicyclopentadiene (DCPD) monomer is difficult to produce polymerization reaction PDCPD molecular chain, SBA-15 easily reunion, resulting in the flame retardant composite The performance of the composite was not improved obviously. The composite prepared by in-situ polymerization of SBA-15 supported catalyst produced a large number of PDCPD molecular chains in the SBA-15 pores. The pore walls of SBA-15 play an important role in thermal insulation, retarding the thermal decomposition of the polymer chains in the mesopores, significantly improving the thermal stability of the composite and decreasing the horizontal burning rate. The mass ratio of SBA-15 to PDCPD is 3: 100, the limiting oxygen index of the composites increased from 20.1 to 21.7 of PDCPD, indicating that SBA-15 can improve the flame retardancy of PDCPD.