Abstract
The phase transitions in the films of an asymmetric polystyrene-b-poly(2-vinylpyridine) (PS-b-P2VP) were investigated by grazing incidence small-angle X-ray scattering (GISAXS) and transmission electron microscopy (TEM). Compared with the sequential transitions in the bulk, hexagonally perforated layer (HPL) - gyroid (GYR) - disorder (DIS) upon heating, the transitions in film geometry were dramatically changed with decreasing thickness due to the growing preferential interactions from substrate, resulting in a thickness-dependent transition diagram including four different morphologies of hexagonally modulated layer (HML), coexisting (HML and GYR), GYR, and DIS. Particularly in the films ≤ 10Lo, where Lois d-spacing at 150°C, a stable HML structure was identified even above the order-to-disorder transition (ODT) temperature of the bulk, which was attributed to the suppressed compositional fluctuations by the enhanced substrate interactions.
| Original language | English |
|---|---|
| Pages (from-to) | 32-39 |
| Number of pages | 8 |
| Journal | Polymer |
| Volume | 60 |
| DOIs | |
| Publication status | Published - 2015 Mar 9 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry
Cite this
}
Transition behavior of asymmetric polystyrene-b-poly(2-vinylpyridine) films : A stable hexagonally modulated layer structure. / Park, Sungmin; Koo, Kyosung; Kim, Kyunginn; Ahn, Hyungju; Lee, Byeongdu; Park, Cheolmin; Ryu, Du Yeol.
In: Polymer, Vol. 60, 09.03.2015, p. 32-39.Research output: Contribution to journal › Article
TY - JOUR
T1 - Transition behavior of asymmetric polystyrene-b-poly(2-vinylpyridine) films
T2 - A stable hexagonally modulated layer structure
AU - Park, Sungmin
AU - Koo, Kyosung
AU - Kim, Kyunginn
AU - Ahn, Hyungju
AU - Lee, Byeongdu
AU - Park, Cheolmin
AU - Ryu, Du Yeol
PY - 2015/3/9
Y1 - 2015/3/9
N2 - The phase transitions in the films of an asymmetric polystyrene-b-poly(2-vinylpyridine) (PS-b-P2VP) were investigated by grazing incidence small-angle X-ray scattering (GISAXS) and transmission electron microscopy (TEM). Compared with the sequential transitions in the bulk, hexagonally perforated layer (HPL) - gyroid (GYR) - disorder (DIS) upon heating, the transitions in film geometry were dramatically changed with decreasing thickness due to the growing preferential interactions from substrate, resulting in a thickness-dependent transition diagram including four different morphologies of hexagonally modulated layer (HML), coexisting (HML and GYR), GYR, and DIS. Particularly in the films ≤ 10Lo, where Lois d-spacing at 150°C, a stable HML structure was identified even above the order-to-disorder transition (ODT) temperature of the bulk, which was attributed to the suppressed compositional fluctuations by the enhanced substrate interactions.
AB - The phase transitions in the films of an asymmetric polystyrene-b-poly(2-vinylpyridine) (PS-b-P2VP) were investigated by grazing incidence small-angle X-ray scattering (GISAXS) and transmission electron microscopy (TEM). Compared with the sequential transitions in the bulk, hexagonally perforated layer (HPL) - gyroid (GYR) - disorder (DIS) upon heating, the transitions in film geometry were dramatically changed with decreasing thickness due to the growing preferential interactions from substrate, resulting in a thickness-dependent transition diagram including four different morphologies of hexagonally modulated layer (HML), coexisting (HML and GYR), GYR, and DIS. Particularly in the films ≤ 10Lo, where Lois d-spacing at 150°C, a stable HML structure was identified even above the order-to-disorder transition (ODT) temperature of the bulk, which was attributed to the suppressed compositional fluctuations by the enhanced substrate interactions.
UR - http://www.scopus.com/inward/record.url?scp=84922373392&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84922373392&partnerID=8YFLogxK
U2 - 10.1016/j.polymer.2015.01.022
DO - 10.1016/j.polymer.2015.01.022
M3 - Article
AN - SCOPUS:84922373392
VL - 60
SP - 32
EP - 39
JO - Polymer
JF - Polymer
SN - 0032-3861
ER -