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聚乙烯(PE)被广泛应用于电子、电器、化工、机械等领域。聚乙烯在燃烧时会产生熔融滴落现象,燃烧的滴落物可使其它可燃物着火,加速了火灾的蔓延和扩大。为满足防火和环境安全的要求,常常需要对聚乙烯采取阻燃处理。首先合成了双环笼状磷酸酯1-氧基磷杂-4-羟甲基-2,6,7-三氧杂双环[2.2.2]辛烷(PEPA)。然后将合成的膨胀型阻燃剂PEPA均匀的掺杂在PE中,形成了膨胀型阻燃剂/PE体系。之后研究了PEPA的含量对PE阻燃性能的影响。实验表明,随着PEPA的含量增加,阻燃等级达到FV-0,拉伸强度下降。
Polyethylene (PE) is widely used in electronics, electrical appliances, chemicals, machinery and other fields. Polyethylene can cause melt dripping when it is burned. Burning drips can ignite other combustibles and speed up the spread and expansion of fire. To meet fire and environmental safety requirements, it is often necessary to take a flame retardant treatment of polyethylene. First, a bicyclic caged phosphate 1-oxylphospho-4-hydroxymethyl-2,6,7-trioxabicyclo [2.2.2] octane (PEPA) was synthesized. Then the synthetic intumescent flame retardant PEPA uniformly doped in PE, forming an intumescent flame retardant / PE system. After that, the effect of PEPA content on flame retardancy of PE was studied. Experiments show that, as the content of PEPA increases, the flame retardant grade reaches FV-0, the tensile strength decreases.