Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 83: Issue 1
Adiabatic calorimetry and thermal analysis on acetaminophen
Authors:
F Xu Chinese Academy of Sciences Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics Dalian P. R. China 116023 Dalian P. R. China 116023

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L Sun Chinese Academy of Sciences Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics Dalian P. R. China 116023 Dalian P. R. China 116023

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Z Tan Chinese Academy of Sciences Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics Dalian P. R. China 116023 Dalian P. R. China 116023

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J Liang Hunan Institute of Drug Detection Changsha P. R. China 410001 Changsha P. R. China 410001

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T Zhang Chinese Academy of Sciences Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics Dalian P. R. China 116023 Dalian P. R. China 116023

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Pages:
187–191
Online Publication Date:
19 Sep 2005
Publication Date:
08 Jan 2006
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-005-6969-0
Keywords:
acetaminophen; adiabatic calorimetry; DSC; TG-DTG; thermokinetics
Restricted access

Abstract  

Molar heat capacities of acetaminophen were precisely measured with a small sample precision automated adiabatic calorimeter over the temperature range from 80 to 330 K. A solid-solid transition at 149.96 K was found from the Cp,m-T curve. The polynomial functions of Cp,.m(J K-1 mol-1) vs. T were established on the heat capacity measurements by means of the least square fitting method. Thermal decomposition processes of acetaminophen have been studied by thermogravimetry. And the thermal decomposition kinetics parameters, such as activation energy E, pre-exponential factor A and reaction order n, were calculated by TG-DTG techniques with the Freeman-Carroll method, Kissinger method and Ozawa method. Accordingly the thermal decomposition kinetics equation of acetaminophen is expressed as: dα/dt=2.67107e-89630/RT(1-α)0.23. The process of fusion has been investigated through DSC. The melting point, molar enthalpy and entropy of fusion are to be (441.890.04) K, 26.490.44 kJ mol-1 and 59.801.01 J K-1 mol-1, respectively.

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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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