• A model for the analysis of the heat release from a supercooled liquid at the glass transition

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      https://www.ias.ac.in/article/fulltext/pram/041/05/0401-0419

    • Keywords

       

      Time-dependent specific heat; glass transition; structural relaxation

    • Abstract

       

      In this paper we present a phenomenological model to analyze the heat release at the glass transition as observed in the continuous cooling calorimetry when a supercooled liquid freezes into the glassy state. We developed this model for the quantitative analysis of the experimental data to obtain the specific heat and the parameters which govern the structural relaxation. A description of the model and the detailed analysis are presented and the relaxation parameters are compared with the corresponding values obtained from the specific heat spectroscopy. Our analysis reveals several interesting aspects which include the effects of delayed enthalpy relaxation and the nonequilibrium structural relaxation time on the observed specific heat, the temperature dependence of the equilibrium configurational specific heat and the validity of the Vogel-Fulcher equation for the relaxation time.

    • Author Affiliations

       

      M Rajeswari1 2 A K Raychaudhuri1

      1. Department of Physics, Indian Institute of Science, Bangalore - 560 012, India
      2. Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, MD - 20742, USA
    • Dates

       
  • Pramana – Journal of Physics | News

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