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Morphological Investigation of Polydisperse Asymmetric Block Copolymer Systems of Poly(styrene) and Poly(methacrylic acid) in the Strong Segregation Regime

Asad Ayoubi, Mehran LU ; Zhu, Kaizheng ; Nystrom, Bo ; Olsson, Ulf LU ; Almdal, Kristoffer ; Khokhlov, Alexei R. and Piculell, Lennart LU (2013) In Journal of Polymer Science. Part B, Polymer Physics 51(23). p.1657-1671
Abstract
Samples of compositionally (highly) asymmetric diblock copolymers and, also, mixtures of diblock and triblock copolymers (the latter obtained as end-coupling products of two diblock molecules of the mixture), composed of (a) monodisperse majority block(s) of poly(styrene) (PS) and a polydisperse minority block of poly(methacrylic acid) (PMAA), microphase separate into spherical PMAA microdomains, either in disordered liquid-like state or body-centered-cubic (BCC) arrangement, at various annealing temperatures T, in the strong segregation regime SSR. We found that (i) the microphase separated state is favored over an anticipated molecularly homogenous state, (ii) the spherical microdomain morphology (with BCC symmetry) is favored over an... (More)
Samples of compositionally (highly) asymmetric diblock copolymers and, also, mixtures of diblock and triblock copolymers (the latter obtained as end-coupling products of two diblock molecules of the mixture), composed of (a) monodisperse majority block(s) of poly(styrene) (PS) and a polydisperse minority block of poly(methacrylic acid) (PMAA), microphase separate into spherical PMAA microdomains, either in disordered liquid-like state or body-centered-cubic (BCC) arrangement, at various annealing temperatures T, in the strong segregation regime SSR. We found that (i) the microphase separated state is favored over an anticipated molecularly homogenous state, (ii) the spherical microdomain morphology (with BCC symmetry) is favored over an anticipated hexagonally packed cylindrical morphology, (iii) the extent of the dissolution of short PMAA blocks in the PS material can be quantified, (iv) the spherical microdomains are dilated, and (v) despite molecular-weight (and architectural) polydispersity, well-ordered BCC structures can be obtained. (c) 2013 Wiley Periodicals, Inc. (Less)
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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
block copolymers, block polydispersity, microdomain morphology, microphase separation, SAXS, rheology, self-assembly, WAXS
in
Journal of Polymer Science. Part B, Polymer Physics
volume
51
issue
23
pages
1657 - 1671
publisher
John Wiley & Sons Inc.
external identifiers
  • wos:000326533300001
  • scopus:84886641254
ISSN
0887-6266
DOI
10.1002/polb.23389
language
English
LU publication?
yes
id
2ebe749f-9eab-4ad2-9311-1cfb028befbf (old id 4197955)
date added to LUP
2016-04-01 12:52:55
date last changed
2022-01-27 08:07:03
@article{2ebe749f-9eab-4ad2-9311-1cfb028befbf,
  abstract     = {{Samples of compositionally (highly) asymmetric diblock copolymers and, also, mixtures of diblock and triblock copolymers (the latter obtained as end-coupling products of two diblock molecules of the mixture), composed of (a) monodisperse majority block(s) of poly(styrene) (PS) and a polydisperse minority block of poly(methacrylic acid) (PMAA), microphase separate into spherical PMAA microdomains, either in disordered liquid-like state or body-centered-cubic (BCC) arrangement, at various annealing temperatures T, in the strong segregation regime SSR. We found that (i) the microphase separated state is favored over an anticipated molecularly homogenous state, (ii) the spherical microdomain morphology (with BCC symmetry) is favored over an anticipated hexagonally packed cylindrical morphology, (iii) the extent of the dissolution of short PMAA blocks in the PS material can be quantified, (iv) the spherical microdomains are dilated, and (v) despite molecular-weight (and architectural) polydispersity, well-ordered BCC structures can be obtained. (c) 2013 Wiley Periodicals, Inc.}},
  author       = {{Asad Ayoubi, Mehran and Zhu, Kaizheng and Nystrom, Bo and Olsson, Ulf and Almdal, Kristoffer and Khokhlov, Alexei R. and Piculell, Lennart}},
  issn         = {{0887-6266}},
  keywords     = {{block copolymers; block polydispersity; microdomain morphology; microphase separation; SAXS; rheology; self-assembly; WAXS}},
  language     = {{eng}},
  number       = {{23}},
  pages        = {{1657--1671}},
  publisher    = {{John Wiley & Sons Inc.}},
  series       = {{Journal of Polymer Science. Part B, Polymer Physics}},
  title        = {{Morphological Investigation of Polydisperse Asymmetric Block Copolymer Systems of Poly(styrene) and Poly(methacrylic acid) in the Strong Segregation Regime}},
  url          = {{http://dx.doi.org/10.1002/polb.23389}},
  doi          = {{10.1002/polb.23389}},
  volume       = {{51}},
  year         = {{2013}},
}