Netsu Sokutei
Online ISSN : 1884-1899
Print ISSN : 0386-2615
ISSN-L : 0386-2615
Search
Advanced search
OR
Browse
Search
Volume 26, Issue 5
Displaying 1-4 of 4 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • Crystallization and Melting Kinetics of Polymers Revealed by TMDSC
    Akihiko Toda
    1999 Volume 26 Issue 5 Pages 161-172
    Published: November 30, 1999
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.26.161
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Based on the expression of the apparent heat capacity with the contribution of transition kinetics, the applicability of temperature modulated DSC (TMDSC) has been discussed. In order to examine the kinetic response in the apparent heat capacity, the details of the frequency dependence has been examined. On crystallization, the kinetic response appears only in the imaginary part, and the temperature dependence of linear growth rate is obtainable from TMDSC data alone. In the melting region, the apparent heat capacity shows strong frequency dispersion. From the heating rate dependence of the characteristic time, one can evaluate the superheating dependence of melting rate. TMDSC can also differentiate re-crystallization and re-organization from melting since the temperature dependence of those processes is expected to be weak enough compared to melting.
    View full abstract
    Download PDF (1769K)
  • Low-Temperature Crystallization in Fragile Liquids
    Takaaki Hikima, Minoru Hanaya, Masaharu Oguni
    1999 Volume 26 Issue 5 Pages 173-185
    Published: November 30, 1999
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.26.173
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A homogeneous-nucleation-based (HNB) crystallization, which has been discovered at the low temperatures of glass transition temperature region in fragile liquids showing non-Arrhenius properties in the temperature dependence of structural relaxation times, is explained with summarizing classical theories for homogeneous nucleation and crystal growth. The mechanism of HNB crystallization is elucidated, which makes a microscopic homogeneous crystal nucleation process observable macroscopically as the crystallization, and the structural relaxation process of liquids which governs the homogeneous nucleation rates is discussed based on the magnitude and the temperature dependence of HNB crystallization rates.
    View full abstract
    Download PDF (2730K)
  • Present Status towards Revision of the International Temperature Scale of 1990
    Hirohisa Sakurai
    1999 Volume 26 Issue 5 Pages 186-193
    Published: November 30, 1999
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.26.186
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The ITS-90 survived for about 10 years without any fetal defects, except a few trivial ones, such as the data in the conversion table from ITPS-68 to ITS-90 in the range from 660°C to 962°C. In this article is explained the present status towards the revision of the ITS-90, including differences between the ITS-90 and thermodynamic temperatures measured by filter radiation thermometers and acoustic thermometers, non-uniqueness of high temperature platinum thermometers, and a new provisional scale below 1K.
    View full abstract
    Download PDF (1346K)
  • phlogiston
    1999 Volume 26 Issue 5 Pages 194-195
    Published: November 30, 1999
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.26.194
    JOURNAL FREE ACCESS
    Download PDF (282K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top