Specific viscosity of polymer solutions with large thermal blobs

Literature viscosity data are reviewed in both entangled solutions and semidilute unentangled solutions, with several examples of using de Gennes’ thermal blob to rationalize observations for flexible polymers dissolved in intermediate quality solvents. Some puzzling literature data in θ-solvents are also nicely understood with two-parameter scaling upon reanalysis (where the correlation length and the tube diameter concentration dependences differ). However, some literature data seem to not be understood with this simple scheme, suggesting that our understanding of neutral polymer solution viscosity is incomplete. Lastly, combinations of experiments are suggested to better examine the concept of the thermal blob.

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Work Title Specific viscosity of polymer solutions with large thermal blobs
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Open Access
Creators
  1. Ralph H. Colby
  2. Aijie Han
License CC BY 4.0 (Attribution)
Work Type Article
Publisher
  1. Rheologica Acta
Publication Date November 1, 2023
Publisher Identifier (DOI)
  1. 10.1007/s00397-023-01419-7
Deposited October 22, 2024

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  • Added Creator Ralph H. Colby
  • Added Creator Aijie Han
  • Updated Work Title, Publisher, Publisher Identifier (DOI), and 2 more Show Changes
    Work Title
    • Specific Viscosity of Polymer Solutions with Large Thermal Blobs
    • Specific viscosity of polymer solutions with large thermal blobs
    Publisher
    • Rheologica Acta
    Publisher Identifier (DOI)
    • 10.1007/s00397-023-01419-7
    Description
    • <p>Literature viscosity data are reviewed in both entangled solutions and semidilute unentangled solutions, with several examples of using de Gennes’ thermal blob to rationalize observations for flexible polymers dissolved in intermediate quality solvents. Some puzzling literature data in θ-solvents are also nicely understood with two-parameter scaling upon reanalysis (where the correlation length and the tube diameter concentration dependences differ). However, some literature data seem to not be understood with this simple scheme, suggesting that our understanding of neutral polymer solution viscosity is incomplete. Lastly, combinations of experiments are suggested to better examine the concept of the thermal blob.</p>
    Publication Date
    • 2023-11-01
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  • Updated Creator Ralph H. Colby
  • Updated Creator Aijie Han
  • Added Specific Viscosity of Polymer Solutions with Large Thermal Blobs Final.pdf
  • Updated License Show Changes
    License
    • https://creativecommons.org/licenses/by/4.0/
  • Published
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