氯化螺环磷酸酯-双酚A共聚物阻燃剂的研究

Study of Flame Retardant Copolymer of Spirocyclic Pentaerythritol Di(phosphate monochloride) and Bisphenol A

以氯化螺环磷酸酯和双酚A为原料,乙腈为溶剂,三乙胺为缚酸剂和催化剂,在回流条件下反应6h合成了氯化螺环磷酸酯-双酚A共聚物,收率83 3%。采用红外光谱、热分析和示差扫描量热法对产物的结构进行了表征。将阻燃剂应用于聚丙烯阻燃处理,结果表明,磷质量分数每增加1%可以使氧指数提高3 4%,而溴质量分数每增加1%仅使氧指数提高0 5%1 14%,说明共聚物对聚丙烯有较好的阻燃效果,其原因可能是共聚物挥发性低,可较长时间保留于聚丙烯中发挥凝聚相阻燃效能。

Flame retardant of copolymer was synthesized in 83.3% yield by the reaction of spirocyclic pentaerythritol di(phosphate monochloride) with bisphenol A using acetonitrile as solvent and triethylamine as catalyst and acid acceptor under refluxing for 6 h.Structure of the product was characterized by IR,TGA and DSC.The flame retarding effect of it in polypropylene was investigated and the results showed that the oxygen index could be increased by 3.4 for each percent of phosphorus,compared with 0.5-1.14 for bromine.The copolymer exhibits good fire retardancy for polypropylene probably because it has low volatility and thus could exist in polypropylene for long period and act efficiently in condensed phase.