Interfacial structures of block and graft copolymers with lamellar microphase-separated structures

Naoya Torikai; Yushu Matsushita; Sean Langridge; David Bucknall; Jeff Penfold; Masayasu Takeda

doi:10.1016/S0921-4526(99)01882-7

Interfacial structures of block and graft copolymers with lamellar microphase-separated structures

Naoya Torikai, Yushu Matsushita, Sean Langridge, David Bucknall, Jeff Penfold, Masayasu Takeda

Research output: Contribution to journal › Conference article › peer-review

14 Citations (Scopus)

Abstract

Chain conformations of A-polymers of BAB two-component triblock and ABB graft copolymers, composed of polystyrene (= A) and poly(2-vinylpyridine) (= B), with lamellar microphase-separated structures were investigated by small-angle neutron scattering (SANS), and interfacial thicknesses of AB diblock and BAB triblock copolymers were compared by using neutron reflectivity (NR). The middle A-block of BAB triblock copolymer has preferentially `loop' conformation when the volume fraction, φ_A, of A-chain is high above 0.5, while it does preferentially `bridge' conformation when φ_A is low around 0.3. A-graft chain of ABB copolymer has slightly larger dimension along the direction parallel to lamellar interface than A-chain of AB diblock copolymer. The interfacial thickness of BAB triblock copolymer is almost constant irrespective of φ_A, and comparable with that of AB diblock copolymer.

Original language	English
Pages (from-to)	12-16
Number of pages	5
Journal	Physica B: Condensed Matter
Volume	283
Issue number	1-3
DOIs	https://doi.org/10.1016/S0921-4526(99)01882-7
Publication status	Published - Jun 2000
Event	6th International Conference on Surface X-ray and Neutron Scattering 1999 - Noordwijkerhout, Neth Duration: 12 Sept 1999 → 17 Sept 1999

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/S0921-4526(99)01882-7

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title = "Interfacial structures of block and graft copolymers with lamellar microphase-separated structures",

abstract = "Chain conformations of A-polymers of BAB two-component triblock and ABB graft copolymers, composed of polystyrene (= A) and poly(2-vinylpyridine) (= B), with lamellar microphase-separated structures were investigated by small-angle neutron scattering (SANS), and interfacial thicknesses of AB diblock and BAB triblock copolymers were compared by using neutron reflectivity (NR). The middle A-block of BAB triblock copolymer has preferentially `loop' conformation when the volume fraction, φA, of A-chain is high above 0.5, while it does preferentially `bridge' conformation when φA is low around 0.3. A-graft chain of ABB copolymer has slightly larger dimension along the direction parallel to lamellar interface than A-chain of AB diblock copolymer. The interfacial thickness of BAB triblock copolymer is almost constant irrespective of φA, and comparable with that of AB diblock copolymer.",

author = "Naoya Torikai and Yushu Matsushita and Sean Langridge and David Bucknall and Jeff Penfold and Masayasu Takeda",

year = "2000",

month = jun,

doi = "10.1016/S0921-4526(99)01882-7",

language = "English",

volume = "283",

pages = "12--16",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

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note = "6th International Conference on Surface X-ray and Neutron Scattering 1999, SXNS-6 ; Conference date: 12-09-1999 Through 17-09-1999",

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T1 - Interfacial structures of block and graft copolymers with lamellar microphase-separated structures

AU - Torikai, Naoya

AU - Matsushita, Yushu

AU - Langridge, Sean

AU - Bucknall, David

AU - Penfold, Jeff

AU - Takeda, Masayasu

PY - 2000/6

Y1 - 2000/6

N2 - Chain conformations of A-polymers of BAB two-component triblock and ABB graft copolymers, composed of polystyrene (= A) and poly(2-vinylpyridine) (= B), with lamellar microphase-separated structures were investigated by small-angle neutron scattering (SANS), and interfacial thicknesses of AB diblock and BAB triblock copolymers were compared by using neutron reflectivity (NR). The middle A-block of BAB triblock copolymer has preferentially `loop' conformation when the volume fraction, φA, of A-chain is high above 0.5, while it does preferentially `bridge' conformation when φA is low around 0.3. A-graft chain of ABB copolymer has slightly larger dimension along the direction parallel to lamellar interface than A-chain of AB diblock copolymer. The interfacial thickness of BAB triblock copolymer is almost constant irrespective of φA, and comparable with that of AB diblock copolymer.

AB - Chain conformations of A-polymers of BAB two-component triblock and ABB graft copolymers, composed of polystyrene (= A) and poly(2-vinylpyridine) (= B), with lamellar microphase-separated structures were investigated by small-angle neutron scattering (SANS), and interfacial thicknesses of AB diblock and BAB triblock copolymers were compared by using neutron reflectivity (NR). The middle A-block of BAB triblock copolymer has preferentially `loop' conformation when the volume fraction, φA, of A-chain is high above 0.5, while it does preferentially `bridge' conformation when φA is low around 0.3. A-graft chain of ABB copolymer has slightly larger dimension along the direction parallel to lamellar interface than A-chain of AB diblock copolymer. The interfacial thickness of BAB triblock copolymer is almost constant irrespective of φA, and comparable with that of AB diblock copolymer.

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U2 - 10.1016/S0921-4526(99)01882-7

DO - 10.1016/S0921-4526(99)01882-7

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SN - 0921-4526

VL - 283

SP - 12

EP - 16

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - 1-3

T2 - 6th International Conference on Surface X-ray and Neutron Scattering 1999

Y2 - 12 September 1999 through 17 September 1999

ER -

Interfacial structures of block and graft copolymers with lamellar microphase-separated structures

Abstract

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