Fluorinated Vitrimer Elastomers with a Dual Temperature Response

Journal of the American Chemical Society
Marc GuerreFilip E Du Prez

Abstract

Vitrimers are an emerging new class of permanently cross-linked polymeric materials that show a liquid behavior upon heating wherein the macroscopic deformation is controlled by the rate of internal chemical bond exchange reactions. Thus, quite uniquely among polymeric materials, flow rates and material viscosities can be enhanced or controlled by the addition of catalysts and additives. We now report a catalyst-free vitrimer system, prepared from mixing two simple components, wherein two competing bond exchange mechanisms coexist, each showing a strikingly different temperature dependence, related to the large difference in activation energy for the different exchange pathways (60 vs 130-170 kJ/mol). The low barrier process is predominant at lower temperatures, but is outcompeted by the high barrier process that becomes dominant at higher temperatures because of its much more pronounced temperature dependence. The result is an interesting and highly unusual dual viscosity profile for this new class of vitrimer materials: a very gradual decrease in viscosity at lower temperatures, intercepted by a much sharper drop in viscosity at higher temperatures. The highly counterintuitive effect where a higher barrier pathway is dominant...Continue Reading

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Citations

Feb 6, 2019·Macromolecular Rapid Communications·Tuan LiuJinwen Zhang
Feb 12, 2019·Macromolecular Rapid Communications·Julia CuthbertKrzysztof Matyjaszewski
Jun 12, 2019·Physical Chemistry Chemical Physics : PCCP·Jian-Bo WuZhong-Yuan Lu
Aug 9, 2019·Macromolecular Rapid Communications·Xiling NiuAn-Chang Shi
Aug 1, 2020·Macromolecular Rapid Communications·Philipp Haida, Volker Abetz
May 30, 2020·Soft Matter·Alexandra GablierEugene M Terentjev
Dec 29, 2020·Macromolecular Rapid Communications·Christian TaplanFilip E Du Prez
Jan 31, 2021·Polymers·Larissa HammerRenaud Nicolaÿ
Mar 9, 2021·Advanced Materials·Chongnan YeKatja Loos
Jun 15, 2021·Journal of the American Chemical Society·Christian TaplanFilip E Du Prez
Apr 16, 2020·Chemical Science·Marc GuerreFilip E Du Prez
Jun 15, 2021·Chemical Science·Katie M HerbertStuart J Rowan
Aug 23, 2019·Journal of the American Chemical Society·Changfei HeThomas P Russell
Dec 4, 2019·Journal of the American Chemical Society·Jacob J LessardBrent S Sumerlin
Sep 17, 2019·Journal of the American Chemical Society·Georg M ScheutzBrent S Sumerlin
Nov 20, 2019·Journal of the American Chemical Society·Brian B Jing, Christopher M Evans
Jan 6, 2022·Journal of the American Chemical Society·Swagata MondalBrent S Sumerlin
Jan 5, 2022·Angewandte Chemie·Filip Van LijsebettenFilip E Du Prez

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