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Cited by 181

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Equilibrium behavior of asymmetric ABA triblock copolymer melts

Matsen, M. W.·2000·The Journal of Chemical Physics

Abstract

Melts of ABA triblock copolymers with two different sized end blocks are examined using self-consistent field theory. At small asymmetries, the A block bidispersity reduces the stretching energy of the A domains. This effect causes a slight increase in the domain spacing and shifts the order–order transitions (OOTs) toward higher A volume fractions. At large asymmetries, a significant number of the short A blocks pull free of their domains allowing their B blocks to relax. This effect produces a much greater increase in domain spacing and shifts the OOTs toward lower A volume fractions. It also leads to a sizable region of close-packed spheres. At the crossover between these two effects, the ordered morphologies are shifted from their normal compositions by about 10%. The displacement of the complex gyroid region is found to have a strong influence on the metastability of the perforated-lamellar phase.

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Metadata

Authors
Matsen, M. W.
Venue
The Journal of Chemical Physics
Published
2000-10-01
Volume
113
Issue
13
Pages
5539-5544
ISSN
  • 0021-9606 (ISSN-L)
  • 1089-7690
OpenAlex
W4230792165
Cited by
181
References
1
FWCI
1.98
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Equilibrium behavior of asymmetric ABA triblock copolymer melts. https://app.cochat.ai/papers/10.1063/1.1289889
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Matsen, M. W. (2000). Equilibrium behavior of asymmetric ABA triblock copolymer melts. The Journal of Chemical Physics. https://doi.org/10.1063/1.1289889

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