Please use this identifier to cite or link to this item:
https://doi.org/10.1080/02678290110071556
DC Field | Value | |
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dc.title | Supramolecular side chain liquid crystalline polymers assembled via hydrogen bonding between carboxylic acid-containing polysiloxane and azobenzene derivatives | |
dc.contributor.author | Li, X. | |
dc.contributor.author | Goh, S.H. | |
dc.contributor.author | Lai, Y.H. | |
dc.contributor.author | Cheng, S.X. | |
dc.date.accessioned | 2014-06-23T05:51:01Z | |
dc.date.available | 2014-06-23T05:51:01Z | |
dc.date.issued | 2001 | |
dc.identifier.citation | Li, X.,Goh, S.H.,Lai, Y.H.,Cheng, S.X. (2001). Supramolecular side chain liquid crystalline polymers assembled via hydrogen bonding between carboxylic acid-containing polysiloxane and azobenzene derivatives. Liquid Crystals 28 (10) : 1527-1538. ScholarBank@NUS Repository. <a href="https://doi.org/10.1080/02678290110071556" target="_blank">https://doi.org/10.1080/02678290110071556</a> | |
dc.identifier.issn | 02678292 | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/77109 | |
dc.description.abstract | Supramolecular side chain liquid crystalline polymers were prepared from poly(3-carboxy-propylmethylsiloxane) (PSI100) and azobenzene derivatives through intermolecular hydrogen bonding (H-bonding) between the carboxylic acid groups in the PSI100 and the imidazole rings in the azobenzene derivatives. The existence of H-bonding has been confirmed using FTIR spectroscopy. The polymeric complexes behave as liquid crystalline (LC) polymers and exhibit stable mesophases. The LC behaviour of these H-bonded polymeric complexes was investigated by differential scanning calorimetry, polarizing optical microscopy and X-ray diffraction. The complexes exhibit nematic LC phases identified on the basis of Schlieren optical textures. On increasing spacer length or the concentration of the H-bonded mesogenic unit in the complex, the clearing temperature and the temperature range of the LC phase of the polymeric complex increase. The terminal group plays a critical role in determining the LC properties of the polymeric complexes. A terminal methoxy group is more efficient than a nitro group in increasing the clearing temperature. The electron donor-acceptor interactions between the H-bonded mesogenic units containing methoxy and nitro terminal groups in supramolecular 'copolymeric' complexes lead to an increase in the clearing temperature and a wider temperature range for the LC phase. | |
dc.description.uri | http://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1080/02678290110071556 | |
dc.source | Scopus | |
dc.type | Article | |
dc.contributor.department | CHEMISTRY | |
dc.description.doi | 10.1080/02678290110071556 | |
dc.description.sourcetitle | Liquid Crystals | |
dc.description.volume | 28 | |
dc.description.issue | 10 | |
dc.description.page | 1527-1538 | |
dc.description.coden | LICRE | |
dc.identifier.isiut | NOT_IN_WOS | |
Appears in Collections: | Staff Publications |
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