聚磷酸铵制备过程中的预聚合反应研究  

Study on prepolymerization reaction in preparation of ammonium polyphosphate

作　　者：余林春[1] 杜怀明[1] 张峰榛[1] 黄斌[1] 罗容珍[2] 周刚[1] 

机构地区：[1]四川理工学院材料与化学工程学院,自贡643000 [2]四川理工学院化学与制药工程学院,自贡643000

出　　处：《化工新型材料》2014年第6期178-180,共3页New Chemical Materials

基　　金：四川理工学院人才引进项目(2009XJKRL012);四川省教育厅人文社科重点研究基地科研项目(SCKCZY2011-YB002);自贡市科技局项目(2011G052)

摘　　要：以聚磷酸为初始反应原料,尿素为氨化缩合剂,经预聚合和高温固化2个阶段反应制得聚磷酸铵。针对预聚合反应过程中体系随温度变化由液态转化为固态的复杂过程,探讨了升温速率、温度和时间与表观粘度的关系以及反应压力对预聚合过程的影响。在最佳预聚合反应条件下合成的聚磷酸铵聚合度可以达到65.36,氨氮含量和磷含量分别为14.36%和69.84%(均为质量分数)。Ammonium polyphosphates（APP） were prepared by the polyphosphoric acid with urea as ammoniation polycondensation agent. The whole process of APP polycondensation was Composed of two steps： first prepolymerization and second solidification and ageing treatment. In the process of prepolymerization the reaction system was transformed from liquid to solid with temperature. By experiments, the effect of heating rate on the properties of APP, the relationship of reaction temperature,time and apparent viscosity, and influence of the reaction pressure on the degree of polymerization were discussed. Under the conditions, the polymerization degree of APP was 65. 36, and the content of NH3-N and P2O5 were 14. 36% and 69. 84% （mass）,respectively.

关 键 词：聚磷酸铵 聚磷酸 预聚合 反应过程 

分 类 号：TQ316.3[化学工程—高聚物工业]