Dynamic simulations of potentially auxetic liquid-crystalline polymers incorporating swivelling mesogens
Dynamic simulations under stress were carried out on a series of main-chain polymers containing two types of mesogen. One mesogen is orientated in-line with the chain (end-to-end) and the second (swivelling) has the main chain passing at right angles through it. Under strain the swivelling mesogens...
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Published in | Molecular simulation Vol. 31; no. 13; pp. 883 - 887 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Taylor & Francis Group
01.11.2005
Taylor & Francis |
Subjects | |
Online Access | Get full text |
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Summary: | Dynamic simulations under stress were carried out on a series of main-chain polymers containing two types of mesogen. One mesogen is orientated in-line with the chain (end-to-end) and the second (swivelling) has the main chain passing at right angles through it. Under strain the swivelling mesogens are expected to rotate, pushing apart the neighbouring chains. Polymers incorporating 50% of both mesogens showed a reduced Poisson's ratio. In particular, swivelling mesogens of seven rings length produced a negative Poisson's ratio, and thus should be auxetic. In contrast, polymers containing only end-to-end mesogens had relatively high Poisson's ratios of 0.53-0.59. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0892-7022 1029-0435 |
DOI: | 10.1080/08927020500415584 |