Orientation of microphase-segregated cylinders in liquid crystalline diblock copolymer by magnetic field

N  Tomikawa; Z B  Lu; T  Itoh; C T  Imrie; M  Adachi; M  Tokita; J  Watanabe

doi:10.1143/JJAP.44.L711

Orientation of microphase-segregated cylinders in liquid crystalline diblock copolymer by magnetic field

N Tomikawa, Z B Lu, T Itoh, C T Imrie, M Adachi, M Tokita, J Watanabe

Research output: Contribution to journal › Article

43 Citations (Scopus)

Abstract

This paper reports the first successful preparation of perfectly aligned cylindrical microdomains in liquid crystal (LC) diblock copolymer, polystyrene-block-poly-LC with a poly-LC composition of 84%, by application of a magnetic field. The prerequisite for their alignment is the exhibition of order-disorder transition of the microdomain structure. When the poly-LC segments transform from the isotropic phase to the nematic, well-defined microcylinders are concurrently formed from the weakly segregating state, and their alignment along the magnetic field is realized through the magnetic alignment of LC mesogens.

Original language	English
Number of pages	4
Journal	Japanese Journal of Applied Physics. Part 2, Letters
Volume	44
DOIs	https://doi.org/10.1143/JJAP.44.L711
Publication status	Published - 2005

Keywords

side-chain liquid crystalline polymer
block copolymer
magnetic alignment
nematic phase
microphase separation
cylindrical microdomain
LIVING ANIONIC-POLYMERIZATION
THERMOTROPIC PHASE-BEHAVIOR
WELL-DEFINED STRUCTURES
BLOCK-COPOLYMERS
CONFORMATION
HOMOPOLYMERS
MORPHOLOGY
POLYMERS

Access to Document

10.1143/JJAP.44.L711

Cite this

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title = "Orientation of microphase-segregated cylinders in liquid crystalline diblock copolymer by magnetic field",

abstract = "This paper reports the first successful preparation of perfectly aligned cylindrical microdomains in liquid crystal (LC) diblock copolymer, polystyrene-block-poly-LC with a poly-LC composition of 84%, by application of a magnetic field. The prerequisite for their alignment is the exhibition of order-disorder transition of the microdomain structure. When the poly-LC segments transform from the isotropic phase to the nematic, well-defined microcylinders are concurrently formed from the weakly segregating state, and their alignment along the magnetic field is realized through the magnetic alignment of LC mesogens.",

keywords = "side-chain liquid crystalline polymer, block copolymer, magnetic alignment, nematic phase, microphase separation, cylindrical microdomain, LIVING ANIONIC-POLYMERIZATION, THERMOTROPIC PHASE-BEHAVIOR, WELL-DEFINED STRUCTURES, BLOCK-COPOLYMERS, CONFORMATION, HOMOPOLYMERS, MORPHOLOGY, POLYMERS",

author = "N Tomikawa and Lu, {Z B} and T Itoh and Imrie, {C T} and M Adachi and M Tokita and J Watanabe",

year = "2005",

doi = "10.1143/JJAP.44.L711",

language = "English",

volume = "44",

journal = "Japanese Journal of Applied Physics. Part 2, Letters",

issn = "0021-4922",

publisher = "Japan Society of Applied Physics",

}

TY - JOUR

T1 - Orientation of microphase-segregated cylinders in liquid crystalline diblock copolymer by magnetic field

AU - Tomikawa, N

AU - Lu, Z B

AU - Itoh, T

AU - Imrie, C T

AU - Adachi, M

AU - Tokita, M

AU - Watanabe, J

PY - 2005

Y1 - 2005

N2 - This paper reports the first successful preparation of perfectly aligned cylindrical microdomains in liquid crystal (LC) diblock copolymer, polystyrene-block-poly-LC with a poly-LC composition of 84%, by application of a magnetic field. The prerequisite for their alignment is the exhibition of order-disorder transition of the microdomain structure. When the poly-LC segments transform from the isotropic phase to the nematic, well-defined microcylinders are concurrently formed from the weakly segregating state, and their alignment along the magnetic field is realized through the magnetic alignment of LC mesogens.

AB - This paper reports the first successful preparation of perfectly aligned cylindrical microdomains in liquid crystal (LC) diblock copolymer, polystyrene-block-poly-LC with a poly-LC composition of 84%, by application of a magnetic field. The prerequisite for their alignment is the exhibition of order-disorder transition of the microdomain structure. When the poly-LC segments transform from the isotropic phase to the nematic, well-defined microcylinders are concurrently formed from the weakly segregating state, and their alignment along the magnetic field is realized through the magnetic alignment of LC mesogens.

KW - side-chain liquid crystalline polymer

KW - block copolymer

KW - magnetic alignment

KW - nematic phase

KW - microphase separation

KW - cylindrical microdomain

KW - LIVING ANIONIC-POLYMERIZATION

KW - THERMOTROPIC PHASE-BEHAVIOR

KW - WELL-DEFINED STRUCTURES

KW - BLOCK-COPOLYMERS

KW - CONFORMATION

KW - HOMOPOLYMERS

KW - MORPHOLOGY

KW - POLYMERS

U2 - 10.1143/JJAP.44.L711

DO - 10.1143/JJAP.44.L711

M3 - Article

VL - 44

JO - Japanese Journal of Applied Physics. Part 2, Letters

JF - Japanese Journal of Applied Physics. Part 2, Letters

SN - 0021-4922

ER -