| 聚磷酸铵缩聚反应的动力学研究 |
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| 引用本文： | 何志俊,刘够生,刘心纯,于建国.聚磷酸铵缩聚反应的动力学研究[J].材料导报,2009,23(22). |
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| 作者姓名： | 何志俊 刘够生 刘心纯 于建国 |
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| 作者单位： | 华东理工大学资源过程工程研究所,上海,200237 |
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| 基金项目： | 国家十一五科技支撑项目 |
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| 摘 要： | 以食品级磷酸(85%)为初始反应原料,尿素为缩合剂,经逐步缩聚反应制得聚磷酸铵.该反应可分为反应动力学控制(预聚合)以及固化熟化处理2个阶段.探讨了各阶段的反应过程,并对聚磷酸铵的反应动力学进行了研究.结果表明,其动力学符合不可逆二级反应机理,反应活化能为70.605kJ/mol.
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| 关 键 词： | 聚磷酸铵 缩聚反应 阶段聚合 聚合反应动力学 |
Kinetics Study on Ammonium Polyphosphate Polycondensation |
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| HE Zhijun,LIU Gousheng,LIU Xinchun,YU Jianguo.Kinetics Study on Ammonium Polyphosphate Polycondensation[J].Materials Review,2009,23(22). |
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| Authors: | HE Zhijun LIU Gousheng LIU Xinchun YU Jianguo |
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| Abstract: | Ammonium polyphosphates (APP) are prepared by the polycondensation of food-grade phosphoric acid with urea as polycondensation agent. The whole process of APP polycondensation is composed of two steps. The first is chemical reaction controlling(pre-polymerization) process, the second is solidification and ageing treatment. The process of polymerization in each step is investigated, and the kinetics of APP polymerization in pre-polymerization step is studied. Results show that it is a second order irreversible reaction with activation energy of 70.605kJ/mol. |
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| Keywords: | ammonium polyphosphates(APP) polycondensation step polymerization kinetics of polymerization |
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