Abstract
Thin films of poly(styrene‐block‐methyl methacrylate) diblock copolymer [P(St‐b‐MMA)] with thickness ca. 50 nm were prepared by a dip‐coating method. The surface Tg for the P(St‐b‐MMA) thin film was evaluated on the basis of the temperature‐dependent X‐ray photoelectron spectroscopic (TDXPS) measurement. The temperature at which the surface composition started to change was defined as the glass transition temperature, Tg, at the surface region. It was revealed that the surface Tg for P(St‐b‐MMA) was much lower than that for its bulk sample. Also, the depth dependence of Tg for P(St‐b‐MMA) was investigated on the basis of the combination of TDXPS and the angular‐dependent XPS (ADXPS) method. Tg for P(St‐b‐MMA) decreased with a decrease in distance from the outermost surface. The molecular weight dependence of the surface Tg for P(St‐b‐MMA) was more pronounced than that in the bulk sample, and that was expressed as a function of M −(0.45±0.02)n.
| Original language | English |
|---|---|
| Pages (from-to) | 476-482 |
| Number of pages | 7 |
| Journal | Acta Polymerica |
| Volume | 46 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jan 1 1995 |
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All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Polymers and Plastics
Cite this
Surface molecular motion in thin films of poly(styrene‐block‐methyl methacrylate) diblock copolymer. / Tanaka, Keiji; Takahara, Atsushi; Kajiyama, T.
In: Acta Polymerica, Vol. 46, No. 6, 01.01.1995, p. 476-482.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Surface molecular motion in thin films of poly(styrene‐block‐methyl methacrylate) diblock copolymer
AU - Tanaka, Keiji
AU - Takahara, Atsushi
AU - Kajiyama, T.
PY - 1995/1/1
Y1 - 1995/1/1
N2 - Thin films of poly(styrene‐block‐methyl methacrylate) diblock copolymer [P(St‐b‐MMA)] with thickness ca. 50 nm were prepared by a dip‐coating method. The surface Tg for the P(St‐b‐MMA) thin film was evaluated on the basis of the temperature‐dependent X‐ray photoelectron spectroscopic (TDXPS) measurement. The temperature at which the surface composition started to change was defined as the glass transition temperature, Tg, at the surface region. It was revealed that the surface Tg for P(St‐b‐MMA) was much lower than that for its bulk sample. Also, the depth dependence of Tg for P(St‐b‐MMA) was investigated on the basis of the combination of TDXPS and the angular‐dependent XPS (ADXPS) method. Tg for P(St‐b‐MMA) decreased with a decrease in distance from the outermost surface. The molecular weight dependence of the surface Tg for P(St‐b‐MMA) was more pronounced than that in the bulk sample, and that was expressed as a function of M −(0.45±0.02)n.
AB - Thin films of poly(styrene‐block‐methyl methacrylate) diblock copolymer [P(St‐b‐MMA)] with thickness ca. 50 nm were prepared by a dip‐coating method. The surface Tg for the P(St‐b‐MMA) thin film was evaluated on the basis of the temperature‐dependent X‐ray photoelectron spectroscopic (TDXPS) measurement. The temperature at which the surface composition started to change was defined as the glass transition temperature, Tg, at the surface region. It was revealed that the surface Tg for P(St‐b‐MMA) was much lower than that for its bulk sample. Also, the depth dependence of Tg for P(St‐b‐MMA) was investigated on the basis of the combination of TDXPS and the angular‐dependent XPS (ADXPS) method. Tg for P(St‐b‐MMA) decreased with a decrease in distance from the outermost surface. The molecular weight dependence of the surface Tg for P(St‐b‐MMA) was more pronounced than that in the bulk sample, and that was expressed as a function of M −(0.45±0.02)n.
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UR - http://www.scopus.com/inward/citedby.url?scp=0029180499&partnerID=8YFLogxK
U2 - 10.1002/actp.1995.010460612
DO - 10.1002/actp.1995.010460612
M3 - Article
AN - SCOPUS:0029180499
VL - 46
SP - 476
EP - 482
JO - Macromolecular Chemistry and Physics
JF - Macromolecular Chemistry and Physics
SN - 1022-1352
IS - 6
ER -