Geopolymers
Inorganic polymeric new materials
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Q. Hu
Q. Hu
Nano-materials and Chemistry Key Laboratory, Wenzhou University, Wenzhou, Zhejiang, 325035, China
Department of Pharmacology, School of Basic Medicine, Hangzhou Normal University, Hangzhou, Zhejiang, 310036, China
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Department of Pharmacology, School of Basic Medicine, Hangzhou Normal University, Hangzhou, Zhejiang, 310036, China
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H. L. Jin
H. L. Jin
Nano-materials and Chemistry Key Laboratory, Wenzhou University, Wenzhou, Zhejiang, 325035, China
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X. A. Chen
X. A. Chen
Nano-materials and Chemistry Key Laboratory, Wenzhou University, Wenzhou, Zhejiang, 325035, China
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S. Wang
S. Wang
Nano-materials and Chemistry Key Laboratory, Wenzhou University, Wenzhou, Zhejiang, 325035, China
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Abstract
Thermal decomposition of N,N′-diphenylguanidine (DPG) was investigated by simultaneous TG/DSC-FTIR techniques under nonisothermal conditions. Online FTIR measurements illustrate that aniline is a major product of DPG decomposition. The observation that the activation energy depends on the extent of conversion indicates that the DPG decomposition kinetics features multiple processes. The initial elimination of aniline from DPG involves two pathways because of the isomerization of DPG. Mass spectrometry and thin film chromatography suggest that there are two major intermediate products with the major one of C21N3H17. The most probable kinetic model deduced through multivariate nonlinear regression method agrees well with the experimental data with a correlation coefficient of 0.9998. The temperature-independent function of conversion f(α), activation energy E and the pre-exponential factor A of DPG decomposition was also established through model-fitting method in this research.
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| Journal of Thermal Analysis and Calorimetry | |
|---|---|
| Language | English |
| Size | A4 |
| Year of Foundation |
1969 |
| Volumes per Year |
1 |
| Issues per Year |
24 |
| Founder | Akadémiai Kiadó |
| Founder's Address |
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. |
| Publisher | Akadémiai Kiadó Springer Nature Switzerland AG |
| Publisher's Address |
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11. |
| Responsible Publisher |
Chief Executive Officer, Akadémiai Kiadó |
| ISSN | 1388-6150 (Print) |
| ISSN | 1588-2926 (Online) |
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Temperature dependence of the rate of reaction in thermal analysis
The Arrhenius equation in condensed phase kinetics
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