聚氨基环三磷腈的制备及性能分析

对氨基环三磷腈的缩聚及缩聚物的性能进行了研究.结果表明,氨基环三磷腈的取代度对其缩聚有显著的影响.随取代度的增大,聚合产率先增大后减小,游离氯、结合氯含量均逐渐减少,而溶解度、吸湿性逐渐增大.氨基环三磷腈的较佳缩聚条件是：氨基环三磷腈的取代度为92.6％,聚合温度为178～182℃,聚合时间为0.5h.在此条件下,产品的产率为94.32％,总氯含量为2.05％,磷含量为50.89％,氮含量为43.38％,氢含量为3.68％,溶解度为1.05 g（100mL水中）,在相对湿度为50％～60％时,吸湿率为5.9％.聚氨基环三磷腈主要由氨基环三磷腈的二聚体、三聚体、四聚体和五聚体组成,其中以三聚体为主.聚氨基环三磷腈阻燃元素磷、氮含量高,热稳定性较好,近于中性,适合作为阻燃剂.

Preparation and Property of Polyaminocyclotriphosphazene

In this paper, the polycondensation of aminocyclotriphosphazene and the prop- erty of the condensation polymer were studied. The results indicated that The substitu- tion degree of aminocyclotriphosphazene had significant impact on its polycondensation. With the increasing of substitution degree, the polymerization yield increased first and then decreased, the content of free chlorine and combined chlorine gradually decreased, contrary to the solubility and hygroscopicity. The optimum polycondensation conditions were as follows： The substitution degree being 92.6 %, polymerization time being 0. 5 h, the reaction temperature being 178--182 ℃. Under the above conditions, the yield of polyaminocyclotriphosphazene was 94.32%, and the content of chlorine, phosphorous, nitrogen and hydrogen in the product were respectively 2.05%, 52.89%, 43.38% and 3.68% as well as the solubility of the product was 1.05 g（100 mL water） and the hy groscopicity was 5.9% under relative humidity of 50%-60%. The polyaminocyclot- riphosphazene obtained was mainly composed of dimer, trimer, tetramer and pentamer of aminocyclotriphosphazene, especially the trimer. Due to the high content of phos- phorous and nitrogen, better thermal stability and nearly neutral, the polyaminocyclot- riphosphazene was perfectly used as a flame retardant.