2017
DOI: 10.1002/macp.201700332
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Microphase‐Separated Morphology and Liquid Crystal Orientation in Block Copolymers Comprising a Main‐Chain Liquid Crystalline Central Segment Connected to Side‐Chain Liquid Crystalline Segments at Both Ends

Abstract: The self‐assembly behavior of ABA triblock copolymers comprising side‐chain (SC) liquid crystalline (LC) polymer (A blocks) and a main‐chain (MC) LC polyester (B block) is investigated for SCLC segment volume fractions (ϕ) ranging from 22% to 81%. At ϕ = 81% and 65%, the MCLC segments form cylinders and spheres, respectively, embedded in an SCLC matrix. At ϕ ≤ 56%, block copolymers form lamellar microdomains in which each segment forms smectic layers parallel to the lamellae. Whereas MCLC segments are mostly e… Show more

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Cited by 6 publications
(2 citation statements)
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References 38 publications
(70 reference statements)
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“…Besides, different from the other two directions, no scattering signals from LC smectic layers were revealed because the irradiated X-ray beam is almost normal to the lying smectic layer strucuture. The two orientations of BCP domains and side chain LC mesogens perpendicular to each other were also reported in other SCLC BCP systems [45,46]. Besides, the self-assembly structure resulting from block segregation was also revealed by X-ray analysis in combination with TEM.…”
Section: 3supporting
confidence: 60%
“…Besides, different from the other two directions, no scattering signals from LC smectic layers were revealed because the irradiated X-ray beam is almost normal to the lying smectic layer strucuture. The two orientations of BCP domains and side chain LC mesogens perpendicular to each other were also reported in other SCLC BCP systems [45,46]. Besides, the self-assembly structure resulting from block segregation was also revealed by X-ray analysis in combination with TEM.…”
Section: 3supporting
confidence: 60%
“…After the discovery of high‐performance lyotropic liquid crystalline polymers through poly( p ‐phenylene terephthalamide) (Kevlar) and poly( p ‐benzamide), thermotropic liquid aromatic polyesters (TLCPs) have also attracted great attention from industry and academia because of their high thermal stability, high strength/modulus, good chemical resistance, dimensional stability, and easy melt‐processibility. [ 1–10 ] TLCPs form partially ordered and anisotropic liquid crystals even above their melting transition temperatures due to rigid rod‐shaped structural units called mesogenic units. [ 6,11–16 ] Accordingly, TLCPs are applied to super‐engineering thermoplastics, technical fibers, composite materials for automobile parts, etc.…”
Section: Introductionmentioning
confidence: 99%