Self-assembly of symmetric brush diblock copolymers

Weiyin Gu; June Huh; Sung Woo Hong; Benjamin R. Sveinbjornsson; Cheolmin Park; Robert Howard Grubbs; Thomas P. Russell

doi:10.1021/nn305867d

Self-assembly of symmetric brush diblock copolymers

Weiyin Gu, June Huh, Sung Woo Hong, Benjamin R. Sveinbjornsson, Cheolmin Park, Robert Howard Grubbs, Thomas P. Russell

Research output: Contribution to journal › Article › peer-review

127 Citations (Scopus)

Abstract

Self-assembled structures of brush block copolymers (BrBCPs) with polylactide (PLA) and polystyrene (PS) side chains were studied. The polynorbornene-backbone-based BrBCPs containing approximately equal volume fractions of each block self-assembled into highly ordered lamellae with domain spacing ranging from 20 to 240 nm by varying molecular weight of the backbone in the bulk state, as revealed by small-angle X-ray scattering (SAXS). The domain size increased approximately linearly with backbone length, which indicated an extended conformation of the backbone in the ordered state. In situ SAXS measurements suggested that the BrBCPs self-assemble with an extremely fast manner which could be attributed to a reduced number of entanglements between chains. The strong segregation theory and Monte Carlo simulation also confirmed this near-linear dependence of the domain spacing on backbone length, rationalizing experimental results.

Original language	English
Pages (from-to)	2551-2558
Number of pages	8
Journal	ACS nano
Volume	7
Issue number	3
DOIs	https://doi.org/10.1021/nn305867d
Publication status	Published - 2013 Mar 26
Externally published	Yes

Keywords

Monte Carlo simulation
brush block copolymer
fast kinetics
lamellae
self-assembly

ASJC Scopus subject areas

General Materials Science
General Engineering
General Physics and Astronomy

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10.1021/nn305867d

Cite this

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title = "Self-assembly of symmetric brush diblock copolymers",

abstract = "Self-assembled structures of brush block copolymers (BrBCPs) with polylactide (PLA) and polystyrene (PS) side chains were studied. The polynorbornene-backbone-based BrBCPs containing approximately equal volume fractions of each block self-assembled into highly ordered lamellae with domain spacing ranging from 20 to 240 nm by varying molecular weight of the backbone in the bulk state, as revealed by small-angle X-ray scattering (SAXS). The domain size increased approximately linearly with backbone length, which indicated an extended conformation of the backbone in the ordered state. In situ SAXS measurements suggested that the BrBCPs self-assemble with an extremely fast manner which could be attributed to a reduced number of entanglements between chains. The strong segregation theory and Monte Carlo simulation also confirmed this near-linear dependence of the domain spacing on backbone length, rationalizing experimental results.",

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author = "Weiyin Gu and June Huh and Hong, {Sung Woo} and Sveinbjornsson, {Benjamin R.} and Cheolmin Park and Grubbs, {Robert Howard} and Russell, {Thomas P.}",

year = "2013",

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doi = "10.1021/nn305867d",

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T1 - Self-assembly of symmetric brush diblock copolymers

AU - Gu, Weiyin

AU - Huh, June

AU - Hong, Sung Woo

AU - Sveinbjornsson, Benjamin R.

AU - Park, Cheolmin

AU - Grubbs, Robert Howard

AU - Russell, Thomas P.

PY - 2013/3/26

Y1 - 2013/3/26

N2 - Self-assembled structures of brush block copolymers (BrBCPs) with polylactide (PLA) and polystyrene (PS) side chains were studied. The polynorbornene-backbone-based BrBCPs containing approximately equal volume fractions of each block self-assembled into highly ordered lamellae with domain spacing ranging from 20 to 240 nm by varying molecular weight of the backbone in the bulk state, as revealed by small-angle X-ray scattering (SAXS). The domain size increased approximately linearly with backbone length, which indicated an extended conformation of the backbone in the ordered state. In situ SAXS measurements suggested that the BrBCPs self-assemble with an extremely fast manner which could be attributed to a reduced number of entanglements between chains. The strong segregation theory and Monte Carlo simulation also confirmed this near-linear dependence of the domain spacing on backbone length, rationalizing experimental results.

AB - Self-assembled structures of brush block copolymers (BrBCPs) with polylactide (PLA) and polystyrene (PS) side chains were studied. The polynorbornene-backbone-based BrBCPs containing approximately equal volume fractions of each block self-assembled into highly ordered lamellae with domain spacing ranging from 20 to 240 nm by varying molecular weight of the backbone in the bulk state, as revealed by small-angle X-ray scattering (SAXS). The domain size increased approximately linearly with backbone length, which indicated an extended conformation of the backbone in the ordered state. In situ SAXS measurements suggested that the BrBCPs self-assemble with an extremely fast manner which could be attributed to a reduced number of entanglements between chains. The strong segregation theory and Monte Carlo simulation also confirmed this near-linear dependence of the domain spacing on backbone length, rationalizing experimental results.

KW - Monte Carlo simulation

KW - brush block copolymer

KW - fast kinetics

KW - lamellae

KW - self-assembly

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Self-assembly of symmetric brush diblock copolymers

Abstract

Keywords

ASJC Scopus subject areas

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