Physical Chemistry

Second-order Phase Transition Behavior in a Polymer above the Glass Transition Temperature



<p>Glass transition was primarily considered to be not phase transition; however, it has similarity to the second-order phase transition. Recent single-molecule spectroscopy developments have prompted re-investigating glass transition at the microscopic scale, revealing that glass transition includes phenomena similar to second-order phase transition. They are characterized by microscopic collective polymer motion and discontinuous changes in temperature dependent relaxation times, later of which is similar to critical slowing down, within a temperature window that includes the polymer calorimetric glass transition temperature. Considering that collective motion and critical slowing down are accompaniments to critical phenomena, second-order phase transition behavior was identified in polymer glass transition.</p>

Version notes

Three-fold revisions were completed: totally up-dating introduction to cut the redundant description, completely separating Results and Discussion, replacing the temperature dependent relaxation times with more suitable ones to appeal the points of the manuscript.


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Supplementary material

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ver 5.0 ChemRxiv SupportingInfo MIshikawa
The ver 5.0 Supporting Information included new data on DSC measurements and replaced data on temperature dependent relaxation times.

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