Issue 7, 1996

Liquid-crystalline rod–coil polymers based on poly(ethylene oxide)s and the influence of the complexation of LiCF3SO3 on the liquid-crystalline assembly

Abstract

The synthesis and characterization of rod–coil polymers of ethyl 4′-(4′-oxy-4-biphenylcarbonyloxy)-4-biphenylcarboxylate with polyethylene oxide of three (34), seven (74), twelve (124) and sixteen (164) ethylene oxide units, of 4′-(4′-oxy-4-phenylcarbonyloxy)-4-biphenylcarboxylate with poly(ethylene oxide) of sixteen ethylene oxide units (163), and of ethyl 4′-oxy-4-biphenylcarboxylate with poly (ethylene oxide) of sixteen ethylene oxide units (162) are described. All the rod-coil polymers except 162 display a layered smectic mesophase and, in particular, 164 shows a microphase-separated morphology. The complexes of 164 with up to 0.3 mol of LiCF3SO3 per mol of ethylene oxide units are also prepared. The rod-coil polymer 164 exhibits an enantiotropic smectic B (SB) mesophase. The complexes with 0.05 and 0.1 mol of LiCF3SO3, however, exhibit an enantiotropic smectic A (SA) mesophase in addition to an SB phase. In contrast with the complexes with 0.0–0.1 mol of LiCF3SO3, the complexes with 0.2 and 0.3 mol do not exhibit any smectic mesophases; however, they display a cylindrical micellar mesophase.

Article information

Article type
Paper

J. Mater. Chem., 1996,6, 1079-1086

Liquid-crystalline rod–coil polymers based on poly(ethylene oxide)s and the influence of the complexation of LiCF3SO3 on the liquid-crystalline assembly

M. Lee and N. Oh, J. Mater. Chem., 1996, 6, 1079 DOI: 10.1039/JM9960601079

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