Events The 13th International Electronic Conference on Synthetic Organic Chemistry

Event submissions

Published

This submission belongs to the session f. Polymer and Supramolecular Chemistry of the event The 13th International Electronic Conference on Synthetic Organic Chemistry

Published date

05 Nov, 2009

Citation

B. Q. Wang, P. Hu, K. Q. Zhao, P. Kang, Synthesis and Properties of Polyacetylene Liquid Crystals Containing Perfluorinated Alkyl Chain, in Proceedings of The 13th International Electronic Conference on Synthetic Organic Chemistry, 1 November–30 November 2009, MDPI: Basel, Switzerland, doi: 10.3390/ecsoc-13-00229

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Synthesis and Properties of Polyacetylene Liquid Crystals Containing Perfluorinated Alkyl Chain

B. Q. Wang ¹

P. Hu ¹

K. Q. Zhao ¹

P. Kang ¹

1. College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610066, China

Abstract

Liquid crystal monomers and polymers containing fluorinated alkyl chain have been prepared. The polymerization initiated by [Rh(nbd)Cl]2 has afforded the products in moderate to high yields. The molecular weight of polymers has been measured with gel permeation chromatography (GPC), the results show that the transition metal catalyst in THF/Et3N solvent system gives the best results for the polymerization. Monomers and polymers are characterized by IR and 1HNMR, and the liquid crystalline properties are evaluated by using POM, DSC and TGA. The results show that the monomers with fluorinated chain and polymers show SmA phase. The fluorinated polymers possess higher clearing points and broader mesophases than the alkyl chain polymers.

Keywords

conjugated polymers

polyacetylenes

liquid crystals

liquid-crystalline polymers

SmA phase

fluorophobic effect

microsegregation

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