@inproceedings{4b8595eb0c4b44feabd118a3c8a3b95e,
title = "Discotic liquid crystals: Synthesis and mesomorphic properties of polyacetylenes carrying triphenylene pendant groups",
abstract = "Triphenylene-containing poly(1-decyne)s with different alkyl chain lengths are synthesized and the effects of the structural variables on their mesomorphic properties are investigated. The monomers [HC≡C(CH2) 8CO2C18H6(OCm H2m+1)5; m = 4-9] are prepared by consecutive etherization, coupling, and esterification reactions. The monomers form columnar phases at room temperature. The polymerizations of the monomers are effected by [Rh(nbd)Cl]2, producing soluble polymers in high yields (up to 84\%). The structures and properties of the polymers are characterized and evaluated by IR, NMR, TGA, DSC, POM, and XRD analyses. All the polymers are thermally stable, losing little of their weights when heated to 300°C. The isotropization temperature of the polymers increases initially with the length of alkyl chain but decreases on further extension. Whilst the polymers with shorter and longer alkyl chain lengths adopt a homogeneous hexagonal columnar structure, those with intermediate ones form mesophases with mixed structures.",
keywords = "Conjugated polymers, Discotic liquid crystals, Liquid crystalline polymers, Polyacetylenes, Triphenylene",
author = "Lam, \{Jacky Wing Yip\} and Changmin Xing and Keqing Zhao and Tang, \{Ben Zhong\}",
year = "2008",
doi = "10.1117/12.792721",
language = "English",
isbn = "9780819472700",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Liquid Crystals XII",
note = "Liquid Crystals XII ; Conference date: 11-08-2008 Through 12-08-2008",
}