Glass transition of constrained system measured by position sensitive dynamics measurements
| Project/Area Number |
21340121
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Biophysics/Chemical physics
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| Research Institution | Ritsumeikan University |
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Principal Investigator |
FUKAO Koji 立命館大学, 理工学部, 教授 (50189908)
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| Co-Investigator(Kenkyū-buntansha) |
NAKAMURA Kenji 立命館大学, 理工学部, 助教 (00511693)
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥19,630,000 (Direct Cost: ¥15,100,000、Indirect Cost: ¥4,530,000)
Fiscal Year 2011: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2010: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2009: ¥12,610,000 (Direct Cost: ¥9,700,000、Indirect Cost: ¥2,910,000)
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| Keywords | 高分子薄膜 / ガラス転移 / ダイナミクス測定 / 高分子積層薄膜 / 界面 / フラジリティ / 拡張パラメータ / 非平衡ダイナミクス / レプテーション / VFT / アレニウス / 界面効果 / アニール効果 / 位置分解 / ポリ2クロロスチレン / 単層薄膜 / 膜厚依存性 / 界面相互作用 / ポリ2-クロロスチレン / 誘電緩和測定 / 電気容量 / 水面展開法 |
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| Research Abstract |
The glass transition dynamics of stacked thin films of polystyrene and poly(2-chlorostyrene) were investigated using differential scanning calorimetry and dielectric relaxation spectroscopy. The α-process dynamics of stacked thin films of poly(2-chlorostyrene) show a time evolution from single-thin-film-like dynamics to bulk-like dynamics during the isothermal annealing process. The relaxation rate of the α process becomes smaller with increase in the annealing time. The time scale for the evolution of the α dynamics during the annealing process is very long compared with that for the reptation dynamics. At the same time, the temperature dependence of the relaxation time for the α process changes from Arrhenius-like to Vogel-Fulcher-Tammann dependence with increase of the annealing time. The fragility index increases and the distribution of the α-relaxation times becomes smaller with increase in the annealing time for isothermal annealing. The observed change in the α process is discussed with respect to the interfacial interaction between the thin layers of stacked thin polymer films.
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Report
(4 results)
Research Products
(64 results)
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[Book] 高分子の物理(改訂新版)2010
Author(s)
深尾浩次, 宮本嘉久, 田口健, 中村健二共訳, G.R.Strobl著
Total Pages
503
Publisher
シュプリンガー・ジャパン
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