反应性阻燃剂五苯基-1,3,2-二氧磷杂环戊烷的研究进展

Advancement of Researching-1,3,2-Dioxaphospholane of 5-Pentaphenyl of Reactivity Fire Retardant

2,4,4,5,5-五苯基-1,3,2-二氧磷杂环戊烷可以用二氯苯膦处理苯频哪醇生成。这种磷杂环戊烷含有一个变形的碳-碳键,70℃热均裂形成的双自由基可以引发苯乙烯的聚合。苯乙烯单体存在下磷杂环戊烷裂解生成的聚合物,主链中含有磷。这种聚合物的热稳定性和常规聚苯乙烯相当,可燃性却降低,有效地推动了苯乙烯聚合物高效无齿阻燃剂的开发研究。

2, 4, 4, 5, 5-dioxaphospholane and -1, 3, 2-dioxaphospholane are produced by phenyl phosphine-dichlorobenzene and benzpinacone. The phospholane contains an anamorphic carbon-carbon bond. The diradical that formed under 70 °C hemolytic may polymerization of styrene. The polymer generated from decomposition of the phospholane in the presence of styrene monomer contains phosphorus in the mainchain. This polymer exhibits thermal stability comparalSle to that of conventional nolvstvrene but decreased flammabilitv.