異なる測定法を用いた低分子量アモルファスポリスチレンの緩和過程
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- 藤村 順
- 大阪大学
書誌事項
- タイトル別名
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- Relaxation Process of Low Molecular Weight Amorphous Polystyrene Using Different Measurement Methods
抄録
We have investigated the relaxation process in the low molecular weight amorphous polystyrene around the glass-transition temperature (Tg) using adiabatic calorimetry, Temperature modulated differential scanning calorimetry (TMDSC), dynamic light scattering (DLS) measurements, dielectric relaxation and viscosity measurements. With the exception of the relaxation times determined from DLS measurements and adiabatic colorimetric measurements below Tg, the relaxation evaluated from each measurement Time showed the same temperature dependence on a time scale of 10−6 to 102 s. The relaxation phenomena above Tg observed in adiabatic calorimetry, TMDSC, and dielectric relaxation measurements are consistent with the viscosity measurements of associated with the results, and these relaxation processes are due to the α-process directly related to the glass transition. The relaxation phenomena obtained using DLS correspond to processes based on simple diffusion motion. The relaxation observed in the adiabaticcalorimetry below Tg is also due to the α-process, but it is measured under non-equilibrium thermodynamic conditions, suggesting a different temperature dependence from other α-process observations.
収録刊行物
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- 熱測定
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熱測定 47 (4), 142-147, 2020-10-25
日本熱測定学会
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詳細情報 詳細情報について
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- CRID
- 1390294186602325632
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- ISSN
- 18841899
- 03862615
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
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- 抄録ライセンスフラグ
- 使用不可