Processing-Structure-Property Relationships of a Polymer-Templated Cholesteric Liquid Crystal Exhibiting Dynamic Selective Reflection
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University of Dayton / OhioLINK
2012
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=dayton1354899969 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-dayton13548999692021-08-03T05:35:56Z Processing-Structure-Property Relationships of a Polymer-Templated Cholesteric Liquid Crystal Exhibiting Dynamic Selective Reflection Duning, Madeline Marie Materials Science cholesteric liquid crystal chiral-structured polymer network gel phase transition dynamic coloration photopolymerization response kinetics Cholesteric liquid crystals (CLCs) are chiral-structured materials that exhibit selective reflection color. While methods to switch off this color with external stimuli have been established, the use of external stimuli to change the reflection color is currently under development. This work explores processing-structure-property relationships of a polymer-templated CLC system that exhibits large-scale reflection color changes with temperature. The effects of heating rate, curing intensity, and cell geometry on the magnitude of these color changes were investigated by collecting transmission spectra of the system during heating and cooling. The system exhibited a constant color change of 500-600 nm at heating rates up to 10°C/min. Samples cured at intensities below 1.00 mW/cm² displayed larger color changes. The cell geometry was largely unaffected by the cell thickness. However, for cell thicknesses between 10 and 50 μm, as cell thickness increased, the magnitude of the color change decreased. The potential impact of attaching, or "tethering," the chiral-structured polymer/liquid crystal gel to the cell surface was also considered. Both tethered and untethered systems displayed large-scale color changes with temperature. 2012 English text University of Dayton / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=dayton1354899969 http://rave.ohiolink.edu/etdc/view?acc_num=dayton1354899969 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
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NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Materials Science cholesteric liquid crystal chiral-structured polymer network gel phase transition dynamic coloration photopolymerization response kinetics |
| spellingShingle |
Materials Science cholesteric liquid crystal chiral-structured polymer network gel phase transition dynamic coloration photopolymerization response kinetics Duning, Madeline Marie Processing-Structure-Property Relationships of a Polymer-Templated Cholesteric Liquid Crystal Exhibiting Dynamic Selective Reflection |
| author |
Duning, Madeline Marie |
| author_facet |
Duning, Madeline Marie |
| author_sort |
Duning, Madeline Marie |
| title |
Processing-Structure-Property Relationships of a Polymer-Templated Cholesteric Liquid Crystal Exhibiting Dynamic Selective Reflection |
| title_short |
Processing-Structure-Property Relationships of a Polymer-Templated Cholesteric Liquid Crystal Exhibiting Dynamic Selective Reflection |
| title_full |
Processing-Structure-Property Relationships of a Polymer-Templated Cholesteric Liquid Crystal Exhibiting Dynamic Selective Reflection |
| title_fullStr |
Processing-Structure-Property Relationships of a Polymer-Templated Cholesteric Liquid Crystal Exhibiting Dynamic Selective Reflection |
| title_full_unstemmed |
Processing-Structure-Property Relationships of a Polymer-Templated Cholesteric Liquid Crystal Exhibiting Dynamic Selective Reflection |
| title_sort |
processing-structure-property relationships of a polymer-templated cholesteric liquid crystal exhibiting dynamic selective reflection |
| publisher |
University of Dayton / OhioLINK |
| publishDate |
2012 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=dayton1354899969 |
| work_keys_str_mv |
AT duningmadelinemarie processingstructurepropertyrelationshipsofapolymertemplatedcholestericliquidcrystalexhibitingdynamicselectivereflection |
| _version_ |
1719422315003904000 |