|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Life Science / Faculty of Advanced Life Science >
Peer-reviewed Journal Articles, etc >
Microrheological study of single chain dynamics in semidilute entangled flexible polymer solutions : Crossover from Rouse to Zimm modes
| Title: | Microrheological study of single chain dynamics in semidilute entangled flexible polymer solutions : Crossover from Rouse to Zimm modes |
| Authors: | Indei, Tsutomu Browse this author →KAKEN DB | | Narita, Tetsuharu Browse this author |
| Keywords: | Microrheology | | Semidilute polymer solution | | Rouse mode | | Zimm mode |
| Issue Date: | 1-Nov-2022 |
| Publisher: | The Society of Rheology |
| Journal Title: | Journal of rheology |
| Volume: | 66 |
| Issue: | 6 |
| Start Page: | 1165 |
| End Page: | 1179 |
| Publisher DOI: | 10.1122/8.0000402 |
| Abstract: | The dynamics of polymer chains in entangled semidilute solution have been of theoretical and experimental interest. Among a number of characteristic lengths and times of the polymer in solution, those of the correlation blob are the key to understand the applicability of the Rouse and Zimm models to rheology of the semidilute solution. Direct rheological measurements of Rouse and Zimm modes are limited as the corresponding time scale is out of the range of classical rheological techniques. We investigated the single chain dynamics of entangled poly(ethylene oxide) in semidilute aqueous solutions by high-frequency micro-rheology based on diffusing-wave spectroscopy compared to classical shear macro-rheology. Concentration dependence of the three characteristic times of the entangled polymer chains, reptation time, entanglement time, and correlation time, was studied with the help of the time-concentration superposition. At the low frequency range, dynamic moduli measured by macro-rheology and micro-rheology showed a good agreement without adjustable parameters. At the higher frequency range, we found the Rouse regime in the mean square displacement of the probe particles and in the magnitude of the complex specific viscosity of the solution. We propose a simple method to estimate the boundary of the Rouse regime. Finally, at the high frequency range, we demonstrate that the contribution of the solvent to the solution viscosity needs to be subtracted to observe the power-law behavior of the Zimm mode. |
| Rights: | This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Journal of Rheology 66, 1165-1179 (2022) and may be found at https://doi.org/10.1122/8.0000402 |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/90762 |
| Appears in Collections: | 生命科学院・先端生命科学研究院 (Graduate School of Life Science / Faculty of Advanced Life Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 印出井 努
|
