Aggregation States of Polystyrene at Nonsolvent Interfaces
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- Norifumi L. Yamada
- Neutron Science Division, Institute for Materials Structure Science, High Energy Acceleration Research Organization, 203-1 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1106, Japan
書誌事項
- 公開日
- 2014-05-27
- 資源種別
- journal article
- DOI
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- 10.1021/la500829p
- 公開者
- American Chemical Society (ACS)
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説明
The aggregation states of polystyrene (PS) thin films at interfaces with nonsolvents such as water, methanol, and hexane were examined by specular neutron reflectivity and sum-frequency generation vibrational spectroscopy. The density profiles of the PS thin films along the direction normal to the interface with water and methanol were comparable to that in air. However, this was not the case for the film in hexane exhibiting a diffuse interfacial layer due to swelling. Also, the local conformation of PS in the outermost region of the films was quite sensitive to the surrounding environment and consequently responded to a change in its environment. This was the case for typical nonsolvents such as water and methanol. The extent of the conformational change might be explained in terms of the interfacial energy.
収録刊行物
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- Langmuir
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Langmuir 30 (22), 6565-6570, 2014-05-27
American Chemical Society (ACS)
