An experimental study on a new type of relaxation time characterizing the glass transition

2014 Fiscal Year Final Research Report

• Project/Area Number: 24540434
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Biophysics/Chemical physics
• Research Institution: Kyoto Institute of Technology
• Principal Investigator: SARUYAMA Yasuo 京都工芸繊維大学, 工芸科学研究科, 教授 (50162532)
• Co-Investigator(Kenkyū-buntansha): YAO Haruhiko 京都工芸繊維大学, 大学院工芸科学研究科, 准教授 (60212271)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: ガラス転移 / 緩和時間 / 温度変調 / 非線形誘電測定

Outline of Final Research Achievements

The molecular mechanism of the glass transition has not been understood. This work is aimed to elucidate the glass transition mechanism through experimental studies to measure the time (tau_tau) necessary for the relaxation time of the alpha process to reach the new value after quick temperature change and its temperature dependence. A new experimental instrument, temperature modulated non-linear dielectric spectroscopy, has been developed. It was found that the tau_tau was ca. 1 s around the glass transition temperature and its temperature dependence was close to Arrhenius type. These results were obtained firstly in the world and will stimulate the studies on the glass transition in future.

Free Research Field

熱物性物理学