Abstract
The phase transitions for the films of a symmetric poly styrene-b-poly (methyl methacryltate) (PS-b-PMMA) on a modified surface, like the order-to-disorder transition (ODT) in the weak segregation regime, was investigated by in situ grazing incidence small-angle X-ray scattering (GISAXS). The selective interactions at the surface by PS-brush substrate that favors the preferential interactions with the PS component of the block copolymer enhance the parallel orientation of the lamellar microdomains to the film surface. This effect for weakly interacting PS-b-PMMA films leads to a gentle decrease of the transition temperature with increasing film thickness up to 50L0 (lamellar period). We discuss this thickness dependence of transition temperatures for PS-b-PMMA films on preferential surfaces in terms of the temperature dependence of γbetween two block components.
| Original language | English |
|---|---|
| Pages (from-to) | 8385-8391 |
| Number of pages | 7 |
| Journal | Macromolecules |
| Volume | 42 |
| Issue number | 21 |
| DOIs | |
| Publication status | Published - 2009 Nov 10 |
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All Science Journal Classification (ASJC) codes
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry
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Transition behavior of weakly interacting PS-b-PMMA films on preferential surfaces : A direct observation by GISAXS. / Kim, Eunhye; Ahn, Hyungju; Ryu, Du Yeol; Kim, Jehan; Cho, Junhan.
In: Macromolecules, Vol. 42, No. 21, 10.11.2009, p. 8385-8391.Research output: Contribution to journal › Article
TY - JOUR
T1 - Transition behavior of weakly interacting PS-b-PMMA films on preferential surfaces
T2 - A direct observation by GISAXS
AU - Kim, Eunhye
AU - Ahn, Hyungju
AU - Ryu, Du Yeol
AU - Kim, Jehan
AU - Cho, Junhan
PY - 2009/11/10
Y1 - 2009/11/10
N2 - The phase transitions for the films of a symmetric poly styrene-b-poly (methyl methacryltate) (PS-b-PMMA) on a modified surface, like the order-to-disorder transition (ODT) in the weak segregation regime, was investigated by in situ grazing incidence small-angle X-ray scattering (GISAXS). The selective interactions at the surface by PS-brush substrate that favors the preferential interactions with the PS component of the block copolymer enhance the parallel orientation of the lamellar microdomains to the film surface. This effect for weakly interacting PS-b-PMMA films leads to a gentle decrease of the transition temperature with increasing film thickness up to 50L0 (lamellar period). We discuss this thickness dependence of transition temperatures for PS-b-PMMA films on preferential surfaces in terms of the temperature dependence of γbetween two block components.
AB - The phase transitions for the films of a symmetric poly styrene-b-poly (methyl methacryltate) (PS-b-PMMA) on a modified surface, like the order-to-disorder transition (ODT) in the weak segregation regime, was investigated by in situ grazing incidence small-angle X-ray scattering (GISAXS). The selective interactions at the surface by PS-brush substrate that favors the preferential interactions with the PS component of the block copolymer enhance the parallel orientation of the lamellar microdomains to the film surface. This effect for weakly interacting PS-b-PMMA films leads to a gentle decrease of the transition temperature with increasing film thickness up to 50L0 (lamellar period). We discuss this thickness dependence of transition temperatures for PS-b-PMMA films on preferential surfaces in terms of the temperature dependence of γbetween two block components.
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U2 - 10.1021/ma901399v
DO - 10.1021/ma901399v
M3 - Article
AN - SCOPUS:70449441448
VL - 42
SP - 8385
EP - 8391
JO - Macromolecules
JF - Macromolecules
SN - 0024-9297
IS - 21
ER -