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1990 Fiscal Year Final Research Report Summary

Dynamic Light Scattering Studies of Polymer Chain Dynamics Under One-Dimensional Shear Flow

Research Project

Project/Area Number 01470106
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 高分子物性
Research InstitutionKyoto University

Principal Investigator

TSUNASHIMA Yoshisuke  Kyoto Univ., Inst. Chem. Res., Research Associate, 化学研究所, 助手 (30089130)

Co-Investigator(Kenkyū-buntansha) ODANI Hisashi  Kyoto Univ., Inst. Chem. Res., Professor, 化学研究所, 教授 (70027019)
Project Period (FY) 1989 – 1990
KeywordsDynamic Light Scattering / Polymer Diffusion / Hydrodynamic Interaction / Steady Shear Flow / Oseen Tensor / Navier-Stokes Equation / Polymer Solution
Research Abstract

Flexible polymer chains in dilute solution show the diffusion motion due to thermal fluctuation of the chain segments. Dynamic light scattering spectroscopy has given direct information on the trans-lational diffusion coefficient and the internal relaxation times of the chains. However, the experimental results has not fully been explained from the theoretical and molecular point of view. The main reason might be due to Oseen approximation which has been customarily used to describe the hydrodynamic interaction exerted on the chain segments. It is well known that when the incompressible fluid is set in an one-dimensional flow, e. g., Couette flow, the Navier-Stokes equation describes exactly the hydrodynamics of the fluid and its exact solution gives the diffusion coefficient of suspended particles in the fluid without any approximation to the hydrodynamic interaction. In this work, We put the polymer chain into such an one-dimensional Couette flow and study the polymer chain dynamics through the dynamic light scattering technique. We poured dilute solutions of polystyrene (Mw=7.76x10^5) and poly (alphaーmethylstyrene) (Mw=2.7x10^6) in benzene (good solvent for both polymers) into the gap between an inner rotating and an outer rest cylinders of a coaxial rotating cylinder viscometer. An eddy-current drive of the inner cylinder yielded a very low shear flow intohe range of 0.57 - 5.3 sec^<-1>. The time correlation function of the scattered light from the solution was measured by a time-interval correlator and was then analyzed to estimate the translaーtional diffusion coefficient and the internal motions of the polymer chains in the Couette flow. Tt is found that the chain dynamics revealed shear-rate dependent behavior, but that at a small finite shear rate the internal motions disappeared and the translational diffusion coefficient could be detected without any ambiguity.

  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] Y.Tsunashima: "Diffusion Mosions and Microphase Separation of StyreneーButadiene Diblok Copolymer in Solution.2.Behavior in nーDecane in the Dilute Solution Region" Macromolecules. 23. 2963-2969 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Tsunashima: "Dynamics and Conformations of Diblok Copolymers in Dilute Solution" KEK Internal(Proceedings of the Workshops on Polymer Science Studied by Neutron Scattering). 26. 71-77 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Tsunashima: "Transition of Diffusion Coefficient from a Random Coil to Interchain Concentric Concentric DoubleーPhase Sphere Structure Types observed in Diblock Copolymer/Selective Solvent System" Macromolecules.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Tsunashima: "Dynamics Polymers in Dilute Solution under VeryーLow Shear Flow" J.Chem.phys.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Akutagawa: "Dynamics of MuscleーContraction Protein Component,Myosin,in Aqueous Solutions.1.Chain Conformation Change induced by salt Concentration and PH Changes" Biophys.J.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Tsunashima: "Dynamics of MusCleーContraction Protein Component,Myosin,in Aqueous Solutions.2.Chain Coalescence under Shear Flow" Biophys.J.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] J.Brandrup,Ed.: "Polymer Handbook,3rd Ed. ViscosityーMolecular Weight Relationships and Unperturbed Dimensions of Linear Chain Molecules" John Wiley & Sons,Inc., 1878 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Onuki,Ed.: "Dynamics and Patterns in Complex Fluids (Proceedings in Physics 52)" SpringerーVerlag, 223 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y. Tsunashima ; N. Nemoto ; M. Kurata: "Time-Division Integrated Light Scattering Photometer. 1. Its Construction and Performance" Bull. Inst. Chem. Res., Kyoto Univ. 67. 54-67 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Tsunashima: "Experimental Test of Renormaliztion-Group Calculations on the Universality of Dilute-Solution Polymer Dynamics" Polymer. 30. 2284-2287 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Tsunashima ; M. Hirata ; Y. Kawamata: "Diffusion Motions and Microphase Separation of Styrene-Butadiene Diblock Copolymer in Solution. 1. Extremely Dilute Solution Region" Macromolecules. 23. 1089-1096 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Tsunashima: "Diffusion Motions and Microphase Separation of Styrene-Butadiene Diblock Copolymer in Solution. 2. Behavior in n-Decane in the Dilute Solution Region" Macromolecules. 23. 2963-2969 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Tsunashima: "Dynamics and Conformations of Diblock Copolymers in Dilute Solution" KEK Internal (Proceedings of the Workshop on Polymer Science Studied by Neutron Scattering). 26. 71-77 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Tsunashima: "Concentration-Dependent Double-step Transition of the Diffusion Coefficient in Dilute Solutions of Styrene-Butadiene Diblock Copolymer in Selective Solvent" Dynamics and Patterns in complex Fluids(Proceeding of Physics). 52. 125-126 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Ueda ; K. Mise ; T. Takekawa ; H. Odani ; S. Kimura: "Sorption and Transport Water Vapor in an Injection-Molded Nylon 6, 6 Sheet" Bull. Inst. Chem. Res., Kyoto Univ. 68. 1-10 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Uede ; K. Mise ; H. Odani ; H. Takahashi: "Transport and Sorption of Water Vapor in Injection-Molded Sheets of Polyethylene/Polyamide mixtures (in Japanese)" Kobunshi Ronbunshu. 47. 425-431 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Kawarada ; A. Hirai ; H. Odani : T. Iida ; A. Nakajima: "Structure Characterization of Alginate and Conformational Behaviors of Various Alkali-Metal Alginates in Solution" Polymer Bull. 24. 551-557 (1990)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-08-12  

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