Specific viscosity of polymer solutions with large thermal blobs

Ralph H. Colby, Aijie Han

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)687-693
Number of pages7
JournalRheologica Acta
Issue number11-12
StatePublished - Nov 2023

All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)
  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials

Cite this