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Phosphorus, Sulfur, and Silicon and the Related Elements Volume 191, 2016 - Issue 10
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Original Articles

Study on the crystal transformation of ammonium polyphosphate crystalline form V

Detao PanDepartment of Chemical Engineering, East China University of Science and Technology, Shanghai, China
,
Jiawen ZhuDepartment of Chemical Engineering, East China University of Science and Technology, Shanghai, ChinaCorrespondence[email protected]
,
Yanyang WuDepartment of Chemical Engineering, East China University of Science and Technology, Shanghai, China
,
Kui ChenDepartment of Chemical Engineering, East China University of Science and Technology, Shanghai, China
,
Bin WuDepartment of Chemical Engineering, East China University of Science and Technology, Shanghai, China
&
Lijun JiDepartment of Chemical Engineering, East China University of Science and Technology, Shanghai, China
Pages 1306-1312 | Received 13 Jan 2016, Accepted 27 Apr 2016, Published online: 21 Jul 2016
 
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GRAPHICAL ABSTRACT

ABSTRACT

The crystal transformation of ammonium polyphosphate crystalline form V (APPv) was studied. The effects of heating time and water content in the reactor were explored. The results showed that APPv underwent complete conversion to crystalline form II (APPii) when heated at 200°C. The pure and water-insoluble APPii was obtained under the alternate wet ammonia and dry ammonia atmosphere. Then, the thermal behavior of APPv and APPii was investigated. The TG analysis showed APPv had high thermal stability over the range of 300°C to 580°C, which was possibly due to its highly cross-linked structures.

Funding

This work was supported by the Shanghai Municipal Science and Technology Commission (15195800700).

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