Details

Autor(en) / Beteiligte

• Koga, Tadanori
• Seo, Young-Soo
• Zhang, Yimin
• Shin, Kwanwoo
• Kusano, Kouhei
• Nishikawa, Keiko
• Rafailovich, Miriam H
• Sokolov, Jonathan C
• Chu, Benjamin
• Peiffer, Dennis
• Occhiogrosso, Ron
• Satija, Sushil K

Titel

Density-fluctuation-induced swelling of polymer thin films in carbon dioxide

Ist Teil von

• Physical review letters, 2002-09, Vol.89 (12), p.125506-125506, Article 125506

Ort / Verlag

United States

Erscheinungsjahr

2002

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• We report an anomalous swelling of polymer thin films in carbon dioxide (CO(2)) which is associated (in both locus and form) with the density fluctuation ridge that forms along the extension of the coexistence curve of gas and liquid in the P-T phase diagram. Neutron reflectivity results showed that CO(2) could be sorbed to a large extent ( approximately 60%) in thin polymer films even when the bulk miscibility of the polymer with CO(2) is very poor. The anomalous swelling is found to scale with the polymer radius of gyration (R(g)) and extends to a distance approximately 10 R(g).