Auxetic Liquid Crystal Elastomers: Overcoming Barriers to Scale-Up DOI Creative Commons
Stuart R. Berrow, Thomas Raistrick, Richard J. Mandle

et al.

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: 7(7), P. 4517 - 4524

Published: March 24, 2025

The observation of auxetic behavior (i.e., negative Poisson's ratio) in liquid crystal elastomers (LCEs) presents an exciting opportunity to explore application areas previously inaccessible LCEs. Since its initial discovery, research has focused on improving understanding the underpinning physics that drives response, structure-property relationships enable response be tuned, and LCE properties such as refractive index. However, materials reported date have made use either mechanical strain during fabrication, or unreactive 'templates' stabilize nematic ordering precursors. latter approach provides excellent monodomain films, but there is unavoidable anisotropic shrinkage LCE. Both processes employed create complications toward manufacturing scale-up. In this article, we report first example synthesized through surface alignment without a nonreactive 'template' thus need for washout. includes both terminally laterally attached mesogens, threshold 76% strain, displays comparable dependence glass transition temperature literature. This work milestone journey realizing applications

Language: Английский

Auxetic Liquid Crystal Elastomers: Overcoming Barriers to Scale-Up DOI Creative Commons
Stuart R. Berrow, Thomas Raistrick, Richard J. Mandle

et al.

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: 7(7), P. 4517 - 4524

Published: March 24, 2025

The observation of auxetic behavior (i.e., negative Poisson's ratio) in liquid crystal elastomers (LCEs) presents an exciting opportunity to explore application areas previously inaccessible LCEs. Since its initial discovery, research has focused on improving understanding the underpinning physics that drives response, structure-property relationships enable response be tuned, and LCE properties such as refractive index. However, materials reported date have made use either mechanical strain during fabrication, or unreactive 'templates' stabilize nematic ordering precursors. latter approach provides excellent monodomain films, but there is unavoidable anisotropic shrinkage LCE. Both processes employed create complications toward manufacturing scale-up. In this article, we report first example synthesized through surface alignment without a nonreactive 'template' thus need for washout. includes both terminally laterally attached mesogens, threshold 76% strain, displays comparable dependence glass transition temperature literature. This work milestone journey realizing applications

Language: Английский

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