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Volume 6 (1979)
- Issue 4 Pages 132-
- Issue 3 Pages 89-
- Issue 2 Pages 45-
- Issue 1 Pages 2-
Volume 6, Issue 4
Displaying 1-7 of 7 articles from this issue
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Hideaki Chihara, Tooru Atake, Masahiko Ichihashi1979 Volume 6 Issue 4 Pages 132-136
Published: November 10, 1979
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSA simple, inexpensive conduction calorimeter is described which can determine the melting and other transition temperature to within 0.1K on IPTS-68, the impurity concentration, the enthalpy changes to within 1 per cent, and the heat capacities to within 5 per cent. Test runs revealed the existence of a metastable phase in n-octadecane which melts at 300.27K and in n-eicosane which melts at 309.34K. Solid-solid transitions were also recorded in n-nonadecane at 295.50K and in n-docosane at 317.04K.View full abstractDownload PDF (600K) -
Motohiko Muramatsu, Setsuko Umemura, Kazuyo Ohta, Takashi Okada1979 Volume 6 Issue 4 Pages 137-145
Published: November 10, 1979
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSThermogravimetry (TG), derivative thermogravimetry (DTG) and differential scanning calorimetry (DSC) of tobacco and its some major components were carried out in helium atmosphere at a wide range of heating rates. One of the principal objects of the present study is to obtain apparent kinetic parameters useful in predicting the weight loss during the thermal decomposition process of tobacco.
The DTG curves showed that the complex thermal decomposition process of tobacco could be divided into four reaction zones. Assuming that the weight loss in each zone arises from the decomposition of a single solid component following n-th order Arrhenius kinetics, four sets of apparent kinetic parameters were determined from the TG-DTG curves by Kissinger's and Coats-Redfern's kinetic plots. The observed kinetic equations have been found to be very good empirical descriptions of the weight loss during the thermal decomposition process of tobacco.
In addition to kinetic analyses, the general characteristics of the thermal analytical curves of tobacco, as well as the contribution of tobacco components to them, have been discussed.View full abstractDownload PDF (1182K) -
Shin-ichi Iwai, Nobuo Ishizawa, Michihiro Miyake1979 Volume 6 Issue 4 Pages 146-147
Published: November 10, 1979
Released on J-STAGE: September 07, 2009
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Yo-ichiro Mashiko1979 Volume 6 Issue 4 Pages 148-150
Published: November 10, 1979
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSDownload PDF (453K) -
1979 Volume 6 Issue 4 Pages 150
Published: 1979
Released on J-STAGE: September 07, 2009
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thermodynamics of λ-transitionsKatsumi Hamano1979 Volume 6 Issue 4 Pages 151-157
Published: November 10, 1979
Released on J-STAGE: September 07, 2009
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Hideaki Chihara1979 Volume 6 Issue 4 Pages 158-164
Published: November 10, 1979
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSDownload PDF (975K)
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