Molecular Design of Liquid Crystalline Brush-Like Block Copolymers for Magnetic Field Directed Self-Assembly: A Platform for Functional Materials

Molecular Design of Liquid Crystalline Brush-Like Block Copolymers for Magnetic Field Directed Self-Assembly: A Platform for Functional Materials

We report on the development of a liquid crystalline block copolymer with brush-type architecture as a platform for creating functional materials by magnetic-field-directed self-assembly. Ring-opening metathesis of n-alkyloxy cyanobiphenyl and polylactide (PLA) functionalized norbornene monomers pro...

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Veröffentlicht in:ACS macro letters 2014-05, Vol.3 (5), p.462-466
Hauptverfasser: Deshmukh, Prashant, Gopinadhan, Manesh, Choo, Youngwoo, Ahn, Suk-kyun, Majewski, Pawel W, Yoon, Sook Young, Bakajin, Olgica, Elimelech, Menachem, Osuji, Chinedum O, Kasi, Rajeswari M
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container_end_page 466
container_issue 5
container_start_page 462
container_title ACS macro letters
container_volume 3
creator Deshmukh, Prashant
Gopinadhan, Manesh
Choo, Youngwoo
Ahn, Suk-kyun
Majewski, Pawel W
Yoon, Sook Young
Bakajin, Olgica
Elimelech, Menachem
Osuji, Chinedum O
Kasi, Rajeswari M
description We report on the development of a liquid crystalline block copolymer with brush-type architecture as a platform for creating functional materials by magnetic-field-directed self-assembly. Ring-opening metathesis of n-alkyloxy cyanobiphenyl and polylactide (PLA) functionalized norbornene monomers provides efficient polymerization yielding low polydispersity block copolymers. The mesogenic species, spacer length, monomer functionality, brush-chain length, and overall molecular weight were chosen and optimized to produce hexagonally packed cylindrical PLA domains which self-assemble and align parallel to an applied magnetic field. The PLA domains can be selectively removed by hydrolytic degradation resulting in the production of nanoporous films. The polymers described here provide a versatile platform for scalable fabrication of aligned nanoporous materials and other functional materials based on such templates.
doi_str_mv 10.1021/mz500161k
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title Molecular Design of Liquid Crystalline Brush-Like Block Copolymers for Magnetic Field Directed Self-Assembly: A Platform for Functional Materials
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