Microdomain expansion and transition behavior of PS-b-PMMA/PS homopolymers by SAXS analysis

Hyungju Ahn, Yonghoon Lee, Hoyeon Lee, Sungmin Park, Yoonkeun Kim, Junhan Cho, Du Yeol Ryu

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We present the microdomain expansion and transition behavior of binary blends of polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA)/PS homopolymers using small-angle X-ray scattering (SAXS) analysis, where the PS molecular weight (or chain length) was varied with chain length ratios (α) of 0.3, 1, and 2 with respect to the PS block length of the PS-b-PMMA. The d-spacing and order-to-disorder transition (ODT) by addition of PS homopolymers were significantly influenced by the PS molecular weight. In contrast to the typical decrease in d-spacing with increasing temperature in PS-b-PMMA, the d-spacing for PS-b-PMMA/PS homopolymers showed unusual behavior; specifically, it increased for shorter PS chains of α ≤ 1, but was independent of temperature for PS chains of α = 2. This variation can be attributed to a competing interaction between the thermal expansion effects of the microdomains with homopolymers and the decrease in the chain stretching between the two block components.

Original languageEnglish
Pages (from-to)5163-5169
Number of pages7
JournalPolymer
Volume53
Issue number22
DOIs
Publication statusPublished - 2012 Oct 12

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Polystyrenes
Polymethyl Methacrylate
Homopolymerization
X ray scattering
Polymethyl methacrylates
Chain length
Molecular weight
Stretching
Thermal expansion
Temperature

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Ahn, Hyungju ; Lee, Yonghoon ; Lee, Hoyeon ; Park, Sungmin ; Kim, Yoonkeun ; Cho, Junhan ; Ryu, Du Yeol. / Microdomain expansion and transition behavior of PS-b-PMMA/PS homopolymers by SAXS analysis. In: Polymer. 2012 ; Vol. 53, No. 22. pp. 5163-5169.
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abstract = "We present the microdomain expansion and transition behavior of binary blends of polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA)/PS homopolymers using small-angle X-ray scattering (SAXS) analysis, where the PS molecular weight (or chain length) was varied with chain length ratios (α) of 0.3, 1, and 2 with respect to the PS block length of the PS-b-PMMA. The d-spacing and order-to-disorder transition (ODT) by addition of PS homopolymers were significantly influenced by the PS molecular weight. In contrast to the typical decrease in d-spacing with increasing temperature in PS-b-PMMA, the d-spacing for PS-b-PMMA/PS homopolymers showed unusual behavior; specifically, it increased for shorter PS chains of α ≤ 1, but was independent of temperature for PS chains of α = 2. This variation can be attributed to a competing interaction between the thermal expansion effects of the microdomains with homopolymers and the decrease in the chain stretching between the two block components.",
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Microdomain expansion and transition behavior of PS-b-PMMA/PS homopolymers by SAXS analysis. / Ahn, Hyungju; Lee, Yonghoon; Lee, Hoyeon; Park, Sungmin; Kim, Yoonkeun; Cho, Junhan; Ryu, Du Yeol.

In: Polymer, Vol. 53, No. 22, 12.10.2012, p. 5163-5169.

Research output: Contribution to journalArticle

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