Physical Chemistry

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

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Abstract

<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.

Content

Thumbnail image of ver5.0_2021ChemRxiv_MIshikawa.pdf

Supplementary material

Thumbnail image of ver5.0_2021ChemRxiv_SupportingInfo_MIshikawa.pdf
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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