Aufsatz
Weathering of a Polyurethane-Based Gel Electrolyte
Abstract
A recently described flexible polyurethane electrolyte was artificially weathered at 25/50 °C and 50% r.h. in air and at 25 °C in a dry nitrogen atmosphere, each with and without UV irradiation. Different formulations and the polymer matrix, used as a reference, were weathered in order to investigate the influence of the amount of conductive lithium salt and the solvent propylene carbonate. The complete loss of the solvent at a standard climate was already observed after a few days, strongly influencing the conductivity and mechanical properties. The essential degradation mechanism appears to be the photo-oxidative degradation of the polyol’s ether bonds, which leads to chain scission, oxidation products and negative changes in the mechanical and optical properties. A higher salt content has no effect on the degradation; however, the presence of propylene carbonate intensifies the degradation.
Citation
In: Polymers Volume 15 / Issue 6 (2023-03-14) eissn:2073-4360Sponsorship
Gefördert durch den Publikationsfonds der Universität KasselCitation
@article{doi:10.17170/kobra-202303317743,
author={Johannes, Christopher and Hartung, Michael and Heim, Hans-Peter},
title={Weathering of a Polyurethane-Based Gel Electrolyte},
journal={Polymers},
year={2023}
}
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2023-03-31T08:59:20Z 2023-03-31T08:59:20Z 2023-03-14 doi:10.17170/kobra-202303317743 http://hdl.handle.net/123456789/14550 Gefördert durch den Publikationsfonds der Universität Kassel eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ weathering polyurethane electrolyte flexible electrochromic device 660 Weathering of a Polyurethane-Based Gel Electrolyte Aufsatz A recently described flexible polyurethane electrolyte was artificially weathered at 25/50 °C and 50% r.h. in air and at 25 °C in a dry nitrogen atmosphere, each with and without UV irradiation. Different formulations and the polymer matrix, used as a reference, were weathered in order to investigate the influence of the amount of conductive lithium salt and the solvent propylene carbonate. The complete loss of the solvent at a standard climate was already observed after a few days, strongly influencing the conductivity and mechanical properties. The essential degradation mechanism appears to be the photo-oxidative degradation of the polyol’s ether bonds, which leads to chain scission, oxidation products and negative changes in the mechanical and optical properties. A higher salt content has no effect on the degradation; however, the presence of propylene carbonate intensifies the degradation. open access Johannes, Christopher Hartung, Michael Heim, Hans-Peter doi:10.3390/polym15061448 Elektrolyt Polyurethane Elektrochemie Polyelektrolyt publishedVersion eissn:2073-4360 Issue 6 Polymers Volume 15 false 1448
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