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ABSTRACT Solutions of polystyrene (_Mw_=1.0×107) in 2-butanone (ethyl methyl ketone), in a concentration range 0.1 mg cc−1 to 10 mg cc−1, were studied using Quasi-Elastic Light Scattering.

The relation of diffusion-like fluctuations in highly concentrated polymer solutions (cooperative diffusion) to the internal motion of single polymers was explored. We observed that when the

concentration of a solution was brought from a dilute region to a highly concentrated region, the Rayleigh line spectrum clearly showed that the internal motion had changed from

intramolecular motion within a single polymer to cooperative diffusion. We also analyzed the relaxation time of the lowest mode of the internal motion of single polymers in terms of the bead

and spring model. SIMILAR CONTENT BEING VIEWED BY OTHERS EXPERIMENTAL QUANTITATION OF MOLECULAR CONDITIONS RESPONSIBLE FOR FLOW-INDUCED POLYMER MECHANOCHEMISTRY Article 10 July 2023 FICKIAN

YET NON-GAUSSIAN DIFFUSION OF A QUASI-2D COLLOIDAL SYSTEM IN AN OPTICAL SPECKLE FIELD: EXPERIMENT AND SIMULATIONS Article Open access 06 May 2023 IMPACT OF LOCAL STIFFNESS ON ENTROPY DRIVEN

MICROSCOPIC DYNAMICS OF POLYTHIOPHENE Article Open access 19 June 2020 ARTICLE PDF REFERENCES * R. Pecora, _J. Chem. Phys._, 49, 1032 (1968). * T. A. King, A. Knox, and J. D. G. McAdam,

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references AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * Department of Physics, Faculty of Science, University of Tokyo, Izumi Nishio & Akiyoshi Wada Authors * Izumi Nishio View author

publications You can also search for this author inPubMed Google Scholar * Akiyoshi Wada View author publications You can also search for this author inPubMed Google Scholar RIGHTS AND

PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE Nishio, I., Wada, A. Quasi-Elastic Light Scattering Study of Concentration Dependence of Diffusion and Internal

Motion in Chain Polymers. _Polym J_ 12, 145–152 (1980). https://doi.org/10.1295/polymj.12.145 Download citation * Issue Date: 01 March 1980 * DOI: https://doi.org/10.1295/polymj.12.145 SHARE

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clipboard Provided by the Springer Nature SharedIt content-sharing initiative KEYWORDS * Polystyrene * Quasi-Elastic Light Scattering * Intramolecular Motion * Cooperative Diffusion