Polymer Relaxation Time Enhancement at Temperatures above Glass Transition Temperatures Predicted by Idealized Mode-Coupling Theory

23 September 2022, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

The mode-coupling theory of glass transition predicts the relaxation time divergence of glass-forming materials at the crossover temperature, which is approximately 1.2 times the calorimetric glass transition temperature. However, this divergence has not been experimentally observed. This is known as the most serious drawback of the mode-coupling theory. The use of viscosity-sensitive single molecule fluorescence probes enables the detection of the poly(vinyl acetate) and poly(ethyl methacrylate) relaxation time enhancement around the crossover temperature, thereby supporting the prediction by the mode-coupling theory.

Keywords

polymer
glass transition
relaxation time
mode-coupling theory

Supplementary materials

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Title
Supporting Information Polymer Relaxation Time Enhancement at Temperatures above Glass Transition Temperatures Predicted by Idealized Mode-Coupling Theory
Description
Experimental design, Sample preparation, Instruments used for SMS, and Bulk PVAC50 and PEMA05 calorimetric analysis and PVAC50 and PEMA05 thin film temperature control are explained including related figures.
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