The Effect of Vitrification on the Diels-Alder Reaction Kinetics

Research output: Unpublished contribution to conferencePoster

Abstract

The effect of vitrification on the Diels-Alder reaction kinetics

The thermoreversible Diels-Alder reaction has attracted much attention for thermally reversible network polymerization. To establish this thermoresponsive behaviour, furan and maleimide functional groups are incorporated into polymer network structures. Self-healing materials use the reversibility of the Diels-Alder equilibrium reaction as a means to repair damage upon thermal or mechanical stimulation.
The dynamic reversibility and the reaction kinetics are well established for applications at temperature above the glass transition temperature [1], e.g., elastomers used for self-healing soft robotic applications [2]. In current work, the effect of vitrification on the Diels-Alder reactivity is studied for applications below and around the glass transition temperature, e.g., low-temperature applications or densely crosslinked thermoset materials. The effect of diffusion control on the reaction kinetics is studied for polymer network systems with dynamically reversible furan-maleimide crosslinks. It is shown how the reaction rates decrease upon vitrification, resulting in slower polymerization and limiting final conversion and crosslink density.

[1] M.M. Diaz, G. Van Assche, F.H.J. Maurer, B. Van Mele, Polymer 120 (2017) 176–188.
[2] S. Terryn, J. Brancart, D. Lefeber, G. Van Assche, B. Vandenborght, Science Robotics 2 (2017) 1–12.
Original languageEnglish
Publication statusPublished - 29 Aug 2018
Event12th European Symposium on Thermal Analysis and Calorimetry - Brasov, Romania
Duration: 27 Aug 201830 Aug 2018

Conference

Conference12th European Symposium on Thermal Analysis and Calorimetry
Abbreviated titleESTAC 12
CountryRomania
CityBrasov
Period27/08/1830/08/18

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