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

doi:10.1016/j.polymer.2012.08.055

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

Department of Chemical and Biomolecular Engineering

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

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 language	English
Pages (from-to)	5163-5169
Number of pages	7
Journal	polymer
Volume	53
Issue number	22
DOIs	https://doi.org/10.1016/j.polymer.2012.08.055
Publication status	Published - 2012 Oct 12

Bibliographical note

Funding Information:
This work was supported by the Nuclear R&D, NRF grants ( 2011-0022690 ), PAL and APCPI ERC program ( R11-2007-050-00000 ), which are funded by the Ministry of Education, Science & Technology (MEST), Korea.

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1016/j.polymer.2012.08.055

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title = "Microdomain expansion and transition behavior of PS-b-PMMA/PS homopolymers by SAXS analysis",

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.",

author = "Hyungju Ahn and Yonghoon Lee and Hoyeon Lee and Sungmin Park and Yoonkeun Kim and Junhan Cho and Ryu, {Du Yeol}",

note = "Funding Information: This work was supported by the Nuclear R&D, NRF grants ( 2011-0022690 ), PAL and APCPI ERC program ( R11-2007-050-00000 ), which are funded by the Ministry of Education, Science & Technology (MEST), Korea.",

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doi = "10.1016/j.polymer.2012.08.055",

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AU - Ahn, Hyungju

AU - Lee, Yonghoon

AU - Lee, Hoyeon

AU - Park, Sungmin

AU - Kim, Yoonkeun

AU - Cho, Junhan

AU - Ryu, Du Yeol

N1 - Funding Information: This work was supported by the Nuclear R&D, NRF grants ( 2011-0022690 ), PAL and APCPI ERC program ( R11-2007-050-00000 ), which are funded by the Ministry of Education, Science & Technology (MEST), Korea.

PY - 2012/10/12

Y1 - 2012/10/12

N2 - 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.

AB - 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

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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