Publication in Progress in Material Science by authors from our Institute, X-PressMatter Laboratory
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In the upcoming issue of Progress in Materials Science (Impact factor 48.165, 200 points (Ministry of Education and Science) the following paper will be published: New Scaling Paradigm in Glass Forming Systems; Aleksandra Drozd-Rzoska, Sylwester J. Rzoska, Szymon Starzonek https://doi.org/10.1016/j.pmatsci.2023.101074 available online 16 January 2023, 101074. The work was done in the X-PressMatter Laboratory located in Innovation Park of IHPP PAS in Celestynów.
The explanation and description of universalistic features of previtreous dynamics, starting as high as 200 degrees above the glass temperature, was included in 2005 by Science magazine among the 125 Great Challenges of Science in the 21st century. So far, there have been many theories and related model equations trying to describe for example the change in viscosity from a few centiPoise (mPa s) to 1013 Poise (Pa s) or alternatively the relaxation time on cooling from picoseconds to 100 seconds. None of these scaling equations has reached a commonly accepted empirical verification. The situation is even worse when approaching the glass transition point by compressing, where the viscosity may strongly increase, decrease or show only ‘weak’ transformation to another pattern of changes (so-called inflection). Additionally, the impact of pressure was lacking a coherent explanation of the phenomenon and even effective relations describing recalled processes.
The publication in Progress in Materials Science offers the first coherent explanation and description of these remarkable changes during compression, and also introduces new relations important for verifying fundamental theoretical models and applications ranging from geophysics to materials science and biotechnology. The publication also explains the qualitative differences between the previtreous dynamics observed during compression and the temperature changes. The main reason for problems in the experimental verification of theoretical models is explained. Analytical tools for solving this problem are proposed and tested.
One of the derived 'pressure' scaling relations, of particular practical importance, was named by the authors the 'Unipress equation’ to celebrate the 50th anniversary of IHPP PAS (IWC PAN).
