Self-Diffusion of Three-Armed Star and Linear Polybutadienes and Polystyrenes in Tetrachloromethane Solution

Ernst von Meerwall, David H. Tomich, James Grigsby, Robert W. Pennisi, Lewis J. Fetters, Nikolaos Hadjichristidis

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

We have used the pulsed-gradient spin-echo method to measure the self-diffusion of linear and three-armed star-branched polystyrenes and polybutadienes (3 × 103  M  106) dissolved in CC14 at 50 °C. We detect no evidence of cooperative diffusion in the semidilute regime. The polymer diffusivities at infinite dilution obey Flory's theory, while their concentration dependences in the dilute regime follow a Pyun-Fixman model. No differences between linear and three-armed molecules are observed in this experiment.

Original languageEnglish (US)
Pages (from-to)1715-1722
Number of pages8
JournalMacromolecules
Volume16
Issue number11
DOIs
StatePublished - Jan 1 1983

ASJC Scopus subject areas

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

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