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Exchangeable Liquid Crystalline Elastomers and Their Applications.

Mohand O Saed1, Alexandra Gablier1, Eugene M Terentjev1

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This review explores exchangeable liquid crystalline elastomers (LCEs) with dynamic cross-linked networks. These advanced LCE materials offer reprocessing, reprogramming, and recycling capabilities for novel applications.

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Area of Science:

  • Materials Science
  • Polymer Chemistry

Background:

  • Liquid crystalline elastomers (LCEs) are advanced materials with unique properties.
  • Traditional LCEs often lack the ability to be reprocessed or recycled.
  • Dynamic covalent chemistry offers a pathway to overcome these limitations.

Purpose of the Study:

  • To review the state-of-the-art in exchangeable LCEs.
  • To focus on the chemistry and reaction mechanisms enabling dynamic bond exchange.
  • To compare different chemical approaches and their resulting elastomer properties.

Main Methods:

  • Review of existing literature on dynamic covalent chemistry in LCEs.
  • Comparative analysis of various bond-exchange mechanisms.
  • Discussion of structure-property relationships in dynamically cross-linked LCEs.

Main Results:

  • Identification of diverse chemical mechanisms for dynamic cross-linking in LCEs.
  • Comparison of the properties conferred by different dynamic chemistries.
  • Highlighting the potential for reprocessing, reprogramming, and recycling of LCEs.

Conclusions:

  • Exchangeable LCEs represent a significant advancement in materials design.
  • Dynamic cross-linking enables sustainable and adaptable LCE materials.
  • Promising applications are emerging due to these enhanced material characteristics.