摘要
采用多聚磷酸蜜胺(MPP)和笼状季戊四醇磷酸酯(PEPA)为复配阻燃剂,制备了无卤阻燃聚丙烯(PP)。研究了MPP/PEPA质量比和纳米SiO2用量对PP复合材料阻燃性能和力学性能的影响。结果表明:当MPP:PEPA=3:2时,协效阻燃效果最好,添加少量的纳米SiO2即可提高PP复合材料的阻燃和力学性能;当MPP、PEPA、纳米SiO2添加量分别为12%、8%和1%时,阻燃PP的氧指数达28.5%,并具有较好的力学性能。TGA和EDX结果表明:添加少量纳米SiO2可以催化MPP/PEPA间的酯化反应,促进PP复合材料成炭,保留更多的磷。SEM分析表明:添加少量的纳米SiO2可稳定炭层和加固泡孔,增强炭层隔热隔氧的能力。
Halogen-free flame retarded PP was prepared by taking the compound of MPP and PEPA as flame retardant. The effects of mass ratio of MPP/PEPA and use amount of nano-SiOz on flame retardancy and mechanical property of PP composite were studied. The results show that： when MPP：PEPA=3：2, the synergistic flame retardancy is excellent, the addition of small amount of nano-SiO2 could improve the flame retandancy and mechanical property of PP composite; when the use amounts of MPP, PEPA, and nano-SiO2 are 12%, 8%, and 1% respectively, the OI of PP composite is up to 28.5%, and the mechanical property of the composite is also excellent. The results of TGA and EDX show that： the adition of small amount of nano-SiO2 could catalyze the esterification between MPP and PEPA, increase char residue of PP cpmposite, and remain more phosphorus. The results of SEM show that： the addition of small amount of nano-SiO2 could stabilize the char layer and strengthen the cell, and improve the ability of char layer to insulate heat and oxygen.
出处
《塑料科技》
CAS
北大核心
2009年第4期67-70,共4页
Plastics Science and Technology
