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 journalArticle

70 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 languageEnglish
Pages (from-to)2551-2558
Number of pages8
JournalACS Nano
Volume7
Issue number3
DOIs
Publication statusPublished - 2013 Mar 26
Externally publishedYes

Fingerprint

brushes
Brushes
block copolymers
Self assembly
Block copolymers
self assembly
copolymers
X ray scattering
spacing
Polystyrenes
lamella
scattering
Conformations
molecular weight
Volume fraction
polystyrene
x rays
Molecular weight
simulation

Keywords

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

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Gu, W., Huh, J., Hong, S. W., Sveinbjornsson, B. R., Park, C., Grubbs, R. H., & Russell, T. P. (2013). Self-assembly of symmetric brush diblock copolymers. ACS Nano, 7(3), 2551-2558. https://doi.org/10.1021/nn305867d

Self-assembly of symmetric brush diblock copolymers. / Gu, Weiyin; Huh, June; Hong, Sung Woo; Sveinbjornsson, Benjamin R.; Park, Cheolmin; Grubbs, Robert Howard; Russell, Thomas P.

In: ACS Nano, Vol. 7, No. 3, 26.03.2013, p. 2551-2558.

Research output: Contribution to journalArticle

Gu, W, Huh, J, Hong, SW, Sveinbjornsson, BR, Park, C, Grubbs, RH & Russell, TP 2013, 'Self-assembly of symmetric brush diblock copolymers', ACS Nano, vol. 7, no. 3, pp. 2551-2558. https://doi.org/10.1021/nn305867d
Gu W, Huh J, Hong SW, Sveinbjornsson BR, Park C, Grubbs RH et al. Self-assembly of symmetric brush diblock copolymers. ACS Nano. 2013 Mar 26;7(3):2551-2558. https://doi.org/10.1021/nn305867d
Gu, Weiyin ; Huh, June ; Hong, Sung Woo ; Sveinbjornsson, Benjamin R. ; Park, Cheolmin ; Grubbs, Robert Howard ; Russell, Thomas P. / Self-assembly of symmetric brush diblock copolymers. In: ACS Nano. 2013 ; Vol. 7, No. 3. pp. 2551-2558.
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