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 | |
| Publication status | Published - 2012 Oct 12 |
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All Science Journal Classification (ASJC) codes
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry
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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 journal › Article
TY - JOUR
T1 - Microdomain expansion and transition behavior of PS-b-PMMA/PS homopolymers by SAXS analysis
AU - Ahn, Hyungju
AU - Lee, Yonghoon
AU - Lee, Hoyeon
AU - Park, Sungmin
AU - Kim, Yoonkeun
AU - Cho, Junhan
AU - Ryu, Du Yeol
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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U2 - 10.1016/j.polymer.2012.08.055
DO - 10.1016/j.polymer.2012.08.055
M3 - Article
AN - SCOPUS:84867060960
VL - 53
SP - 5163
EP - 5169
JO - Polymer
JF - Polymer
SN - 0032-3861
IS - 22
ER -