Tuning the glass transition of siloxane-based poly(ionic liquid)s towards high ion conductivity

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2021
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Reiter, Manuel
Anton, Arthur Markus
Chang, Jian
Kremer, Friedrich
Yuan, Jiayin
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Herein, we report a simple and versatile synthetic approach towards siloxane-based poly(ionic liquid)s (PILs) with unusually low glass transition temperatures (Tg) down to −73°C, and thus “liquid-like” behavior at room temperature. We designed a polydimethylsiloxane-derived copolymer carrying dialkylimidazolium moieties, and by careful selection of the side-chain length and the type of anions we were able to manipulate its Tg over a wide range and reach high ionic conductivities (σDC) up to 4.8 × 10−5 S/cm at 300 K. The ionized species make up only a minor fraction (<25 mol%) of the overall repeating units and are supposedly randomly distributed: Yet our results indicate dramatic effects on the thermal properties due to repulsive interactions between ionic and non-ionic segments.

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ISO 690REITER, Manuel, Arthur Markus ANTON, Jian CHANG, Friedrich KREMER, Miriam M. UNTERLASS, Jiayin YUAN, 2021. Tuning the glass transition of siloxane-based poly(ionic liquid)s towards high ion conductivity. In: Journal of Polymer Science. Wiley-Blackwell. 2021, 59(14), pp. 1518-1527. ISSN 2642-4150. eISSN 2642-4169. Available under: doi: 10.1002/pol.20210200
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@article{Reiter2021-07-15Tunin-54801,
  year={2021},
  doi={10.1002/pol.20210200},
  title={Tuning the glass transition of siloxane-based poly(ionic liquid)s towards high ion conductivity},
  number={14},
  volume={59},
  issn={2642-4150},
  journal={Journal of Polymer Science},
  pages={1518--1527},
  author={Reiter, Manuel and Anton, Arthur Markus and Chang, Jian and Kremer, Friedrich and Unterlass, Miriam M. and Yuan, Jiayin}
}
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