期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 61, 期 17, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202115904
关键词
Elastomers; Isomannide; Isosorbide; Polyurethane; Stereochemistry
资金
- Duke University
- National Science Foundation [DMR1535412, DMR-1507420]
- European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant [751150]
- European Research Council [681559]
- Leverhulme Trust [RPG-2015-120]
- Marie Curie Actions (MSCA) [751150] Funding Source: Marie Curie Actions (MSCA)
This study reports the synthesis of ultra-tough, reprocessable elastomers based on linear alternating polymers. The incorporation of a rigid isohexide adjacent to urethane moieties results in elastomers with exceptional mechanical properties and optical transparency. Isosorbide-based elastomers exhibit superior tensile strength and strain recovery.
The remarkable elasticity and tensile strength found in natural elastomers are challenging to mimic. Synthetic elastomers typically feature covalently cross-linked networks (rubbers), but this hinders their reprocessability. Physical cross-linking via hydrogen bonding or ordered crystallite domains can afford reprocessable elastomers, but often at the cost of performance. Herein, we report the synthesis of ultra-tough, reprocessable elastomers based on linear alternating polymers. The incorporation of a rigid isohexide adjacent to urethane moieties affords elastomers with exceptional strain hardening, strain rate dependent behavior, and high optical clarity. Distinct differences were observed between isomannide and isosorbide-based elastomers where the latter displays superior tensile strength and strain recovery. These phenomena are attributed to the regiochemical irregularities in the polymers arising from their distinct stereochemistry and respective inter-chain hydrogen bonding.
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