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Coil-globule transition of poly(methyl methacrylate) in isoamyl acetate
| Title: | Coil-globule transition of poly(methyl methacrylate) in isoamyl acetate |
| Authors: | Nakata, Mitsuo1 Browse this author →KAKEN DB | | Nakagawa, Tomohide Browse this author |
| Authors(alt): | 中田, 允夫1 |
| Issue Date: | Sep-1997 |
| Publisher: | American Physical Society |
| Journal Title: | PHYSICAL REVIEW E |
| Volume: | 56 |
| Issue: | 3 |
| Start Page: | 3338 |
| End Page: | 3345 |
| Publisher DOI: | 10.1103/PhysRevE.56.3338 |
| Abstract: | The coil-globule transition was studied by static light scattering measurements on poly(methyl methacrylate) with the molecular weight Mw×10-6=2.35 and 4.4 in isoamyl acetate. Since the phase separation of the dilute solution occurred very slowly, the measurements could be made in the broad temperature range from near the Θ temperature 61 °C to 0 °C 30 min after a quench of the solution. The observed expansion factor α2 for the radius of gyration was represented as a function only of τM1/2 and showed a constant value at large -τM1/2 with τ being 1-Θ/T. A quantitative comparison between a recent theory for a contracted coil and the data of α2 revealed the coil-globule crossover phenomena. The behavior of plot of 1/α3 versus -τM1/2 was distinctly different in the three ranges, i.e., coil range, globule range, and range of a constant α. The plot of the observed second virial coefficient A2 against temperature yielded a minimum as predicted from a theory of A2 below the Θ temperature |
| Rights: | Copyright © 1997 American Physical Society |
| Relation: | http://www.aps.org/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/5859 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 中田 允夫
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