Measurements of viscoelastic properties of linear polymers in dilute and semidilute solutions with a flow birefringence method

Suzuki Fumitoshi, Koichiro Hori, Norio Kozuka, Hideaki Komoda, Katsuro Kimiaki, Takahashi Yoshiaki, Noda Ichiro, Nagasawa Mitsuru

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To study viscoelastic properties of flexible macromolecules in dilute and semidilute solutions, a birefringence instrument with high sensitivity was constructed. A circularly polarized laser beam is used as an incident light, and the distortion of the beam by polymer molecules in shear flow was detected by a rotating half wave plate and photomultiplier and compensated with a Babinet-Soleil plate. The birefringence ∆n and extinction angle 훘 of polymer solutions can be measured simultaneously and independently. The steady-shear viscosity 훈 and steady-state compliance Je can be evaluated from observed values of ∆n and 훘 using a stress-optical law. The reliability of these data was confirmed by comparing the data with those determined by a Maron-Krieger-Sisko capillary viscometer and a Weissenberg rheogoniometer. The concentration dependence of reduced steady-state compliance JeR of linear polystyrenes in bromobenzene (a matching solvent) in dilute and semidilute solutions are reported.

Original languageEnglish
Pages (from-to)911-917
Number of pages7
JournalPolymer Journal
Issue number12
Publication statusPublished - Dec 1986
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Materials Chemistry

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