Longest Relaxation Times of Linear Polymers in Concentration Regions between the Critical Concentrations for Zero-Shear Viscosity and for Steady-State Compliance

Yoshiaki Takahashi, Michio Wakutsu, Ichiro Noda

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The longest relaxation times rm of linear polymers in concentration regions between the critical concentrations for the zero-shear viscosity η° and for the steady-state compliance Je, that is, in a semidilute region for η° and in a dilute (not entangled) region for Je, were studied by measuring the stress relaxation after cessation of steady shear flow. It is concluded that the weight-average relaxation time ϊw (= η° Je) is well represented by rm and the magnitudes of the contribution of the terminal relaxation processes to η° are the same in semidilute solutions for η°, whether the entanglements are effective to Je or not.

Original languageEnglish
Pages (from-to)242-245
Number of pages4
JournalMacromolecules
Volume23
Issue number1
DOIs
Publication statusPublished - Jan 1 1990
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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