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Well-Defined Liquid Crystal Gels from Telechelic Polymers

Xia, Yan and Verduzco, Rafael and Grubbs, Robert H. and Kornfield, Julia A. (2008) Well-Defined Liquid Crystal Gels from Telechelic Polymers. Journal of the American Chemical Society, 130 (5). pp. 1735-1740. ISSN 0002-7863. https://resolver.caltech.edu/CaltechAUTHORS:20160627-114737497

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Abstract

Well-defined liquid crystal networks with controlled molecular weight between cross-links and cross-link functionality were prepared by “click” cross-linking of telechelic polymers produced by ring-opening metathesis polymerization (ROMP). The networks readily swell in a small molecule liquid crystal, 5CB, to form LC gels with high swelling ratios. These gels exhibit fast, reversible, and low-threshold optic switching under applied electric fields when they are unconstrained between electrodes. For a given electric field, the LC gels prepared from shorter telechelic polymers showed a reduced degree of switching than their counterparts made from longer polymer strands. The reported approach provides control over important parameters for LC networks, such as the length of the network strands between cross-links, cross-linker functionality, and mesogen density. Therefore, it allows a detailed study of relationships between molecular structure and macroscopic properties of these scientifically and technologically interesting networks.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/ja077192jDOIArticle
http://pubs.acs.org/doi/abs/10.1021/ja077192jPublisherArticle
http://pubs.acs.org/doi/suppl/10.1021/ja077192jRelated ItemSupporting Information
ORCID:
AuthorORCID
Grubbs, Robert H.0000-0002-0057-7817
Kornfield, Julia A.0000-0001-6746-8634
Additional Information:© 2008 American Chemical Society. Received September 17, 2007. Publication Date (Web): January 16, 2008. This work was supported by the U.S. Department of Energy. Y.X. thanks the Li Ming Foundation for a Li Ming scholarship. R.V. thanks the James-Irvine Foundation and the National Defense Science and Engineering for fellowhips.
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)UNSPECIFIED
Li Ming FoundationUNSPECIFIED
James-Irvine Foundation UNSPECIFIED
National Defense Science and Engineering Graduate (NDSEG) FellowshipUNSPECIFIED
Issue or Number:5
Record Number:CaltechAUTHORS:20160627-114737497
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20160627-114737497
Official Citation:Well-Defined Liquid Crystal Gels from Telechelic Polymers Yan Xia, Rafael Verduzco, Robert H. Grubbs, and Julia A. Kornfield Journal of the American Chemical Society 2008 130 (5), 1735-1740 DOI: 10.1021/ja077192j
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:68688
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:27 Jun 2016 23:08
Last Modified:03 Oct 2019 10:15

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