Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 98: Issue 2
Non-isothermal kinetic study of the thermal decomposition of N-{bis[benzyl(methyl)amino]phosphoryl}-2,2-dichloroacetamide and N-{bis[dibenzylamino]phosphoryl}-2,2-dichloroacetamide
Authors:
S. Hajimirsadeghi Malek Ashtar University of Technology Faculty of Material and Manufacturing Technologies P.O. Box 16765-3454 Tehran Iran

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M. Teimouri Iran Polymer and Petrochemical Institute Petrochemical Department P.O. Box 14965-115 Tehran Iran

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M. Rahimi-Nasrabadi Imam Hossein University Department of Chemistry Tehran Iran

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, and
S. Dehghanpour Al-Zahra University Department of Chemistry Tehran Iran

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Pages:
463–468
Online Publication Date:
28 Aug 2009
Publication Date:
01 Nov 2009
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-009-0293-z
Keywords:
Organophosphorus compounds; Thermal stability; Non-isothermal; Activation energy; DSC; TG/DTA; Ozawa; Thermodynamic properties
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Abstract  

In this paper, the thermal behaviours of N-{bis[benzyl(methyl) amino]phosphoryl}-2,2-dichloroacetamide (BMA) and N-{bis[dibenzylamino]phosphoryl}-2,2-dichloroacetamide (DBA) were studied by thermogravimetery (TG) and differential scanning calorimetery (DSC) techniques under the non-isothermal conditions. The results showed that BMA melts about 120 °C before it decomposes. BMA decomposition occurs in three continuous steps, in the 170–400 °C temperature range. Each thermal degradation stage for BMA results an exothermic peak in the DSC curve. On the other hand, applying TG-DSC techniques indicates that DBA melts about 175 °C before it decomposes. This compound decomposes in the temperature range of 200–600 °C in three steps. Activation energy and pre-exponential factor for each compound were found by means of Kissinger method and were verified by Ozawa–Flynn–Wall method. Activation energy obtained by Kissinger method for the first stage of BMA and DBA decompositions are 151.8 (±2.0) KJ mol−1 and 138.7 (±2.6) KJ mol−1, respectively. Finally, the thermodynamic parameters (ΔG#, ΔH# and ΔS#) for first step decomposition of DBA and BMA were determined.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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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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