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Thermochemical and thermal analysis on N-(p-methylphenyl)-N'-(2-pyridyl)urea

  • Y.-J. Song
  • Z.-C. Tan
  • S.-W Lu
  • Y. Xue
Article

Abstract

Low temperature heat capacities of N-(p-methylphenyl)-N'-(2-pyridyl)urea were determined by adiabatic calorimetry method in the temperature range from 80 to 370 K. It was found that there was not any heat anomaly in this temperature region. Based on the experimental data, some thermodynamic function results were obtained. Thermal stability and decomposition characteristics analysis of N-(p-methylphenyl)-N'-(2-pyridyl)urea were carried out by DSC and TG. The results indicated that N-(p-methylphenyl)-N'-(2-pyridyl)urea started to melt at ca. 426 K (153°C) and the melting peak located at 447.01 K (173.86°C). The melting enthalpy was 204.445 kJ mol-1 (899.6 J g-1). The decomposition peak of N-(p-methylphenyl)-N'-(2-pyridyl)urea was found at 499.26 K (226.11°C) from DSC curve. This result was similar with that from TG and DTG experiment, in which the mass loss peak was determined as 500.4 K (227.2°C).

thermal analysis adiabatic calorimetry thermodynamic function N-(p-methylphenyl)-N'-(2-pyridyl)urea 

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Copyright information

© Kluwer Academic Publisher/Akadémiai Kiadó 2004

Authors and Affiliations

  • Y.-J. Song
    • 1
  • Z.-C. Tan
    • 2
  • S.-W Lu
    • 2
  • Y. Xue
    • 2
  1. 1.Beijing Institute of Petrochemical Technology BeijingSchool of Chemical Engineering and MaterialChina E-mail
  2. 2.Thermochemistry Laboratory, Dalian Institute of Chemical PhysicsChinese Academy of Sciences DalianChina

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