Formation of Organized Structures Through Variation in Molecular Architecture and Chemical Composition

Amphiphilic molecules were synthesized in order to force nematic liquid crystals to order into smectic mesophases, and to direct poly(ethylene oxide) to thread macrocrown ethers. The first concept is fairly well developed, with both hydrocarbon/fluorocarbon and hydrocarbon/oligo(dimethylsiloane) ana...

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Bibliographic Details
Published in:Journal of macromolecular science. Part A, Pure and applied chemistry Pure and applied chemistry, 1997-10, Vol.34 (10), p.2057-2071
Main Authors: Pugh, Coleen, Arehart, Stephen V., Bae, Jin-Young, Brandys, Frank A.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Polymers with particular structures
Preparation, kinetics, thermodynamics, mechanism and catalysts
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Summary:Amphiphilic molecules were synthesized in order to force nematic liquid crystals to order into smectic mesophases, and to direct poly(ethylene oxide) to thread macrocrown ethers. The first concept is fairly well developed, with both hydrocarbon/fluorocarbon and hydrocarbon/oligo(dimethylsiloane) analogs of 2,5-bis[(4′-n-alkoxybenzoyl)oxy]toluenes forming only smectic mesophases. In addition to the low molar mass model compounds, the corresponding side-chain liquid crystalline polynorbornenes with hydrocarbon/fluorocarbon substituents organize into smectic layers. Preliminary HPLC results also indicate that the second concept is viable; that poly(ethylene oxide) threads amphiphilic macrocrown ethers that are organized into lyotropic phases in solutions of toluene/H 2 O or benzene/H 2 O.
ISSN:1060-1325
1520-5738
DOI:10.1080/10601329708010325