Journal of Materials Chemistry p. 1079 - 1086 (1996)
Update date:2022-08-17
Topics:
Lee, Myongsoo
Oh, Nam-Keun
The synthesis and characterization of rod-coil polymers of ethyl 4′-(4′-oxy-4-biphenylcarbonyloxy)-4-biphenylcarboxylate with polyethylene oxide) of three (3-4), seven (7-4), twelve (12-4) and sixteen (16-4) ethylene oxide units, of 4′-(4′-oxy-4-phenylcarbonyloxy)-4-biphenylcarboxylate with poly (ethylene oxide) of sixteen ethylene oxide units (16-3), and of ethyl 4′-oxy-4-biphenylcarboxylate with poly (ethylene oxide) of sixteen ethylene oxide units (16-2) are described. All the rod-coil polymers except 16-2 display a layered smectic mesophase and, in particular, 16-4 shows a microphase-separated morphology. The complexes of 16-4 with up to 0.3 mol of LiCF3SO3 per mol of ethylene oxide units are also prepared. The rod-coil polymer 16-4 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.
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