Extended Chain Lamella Formation Characteristics of Main-Chain Smectic Liquid Crystalline Copolyesters Comprising Different Length Units

Extended Chain Lamella Formation Characteristics of Main-Chain Smectic Liquid Crystalline Copolyesters Comprising Different Length Units

A series of liquid crystal (LC) PB-8/12 copolyesters have been synthesized from 4,4′-biphenol with sebacic acid and tetradecanedioic acid, and their LC structures and morphologies have been examined. The copolyesters formed smectic I (SmI) LCs similarly as to the corresponding PB-8 and PB-12 homopol...

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Veröffentlicht in:Macromolecules 2016-04, Vol.49 (7), p.2718-2723
Hauptverfasser: Tokita, Masatoshi, Sugimoto, Astuki, Takahashi, Chiharu, Yoshihara, Shusuke, van de Watering, Renee, Kang, Sungmin
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container_end_page 2723
container_issue 7
container_start_page 2718
container_title Macromolecules
container_volume 49
creator Tokita, Masatoshi
Sugimoto, Astuki
Takahashi, Chiharu
Yoshihara, Shusuke
van de Watering, Renee
Kang, Sungmin
description A series of liquid crystal (LC) PB-8/12 copolyesters have been synthesized from 4,4′-biphenol with sebacic acid and tetradecanedioic acid, and their LC structures and morphologies have been examined. The copolyesters formed smectic I (SmI) LCs similarly as to the corresponding PB-8 and PB-12 homopolyesters; however, dissimilarity of the comonomer lengths decreased the smectic layer order while sustaining the hexagonal order in the lateral packing of the chains. The SmI LCs consisted of 100-nm-thick lamellae stacked along the polymer chain direction. The lamella thicknesses are more than two times greater than the thicknesses of the homopolyesters and comparable to or greater than the chain contour lengths, indicating the formation of extended chain lamellae.
doi_str_mv 10.1021/acs.macromol.6b00100
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title Extended Chain Lamella Formation Characteristics of Main-Chain Smectic Liquid Crystalline Copolyesters Comprising Different Length Units
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