13C NMR relaxation of poly(acrylic acid) in aqueous solution. Effects of charge density on local chain dynamics

Shinichi Yamazaki, Ichiro Noda, Akihiro Tsutsumi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Spin-lattice relaxation time and nuclear Overhauser effect of polyacrylic acid with different degree of neutralization at two magnetic fields were measured as a function of temperature. The main chains were analyzed by Dejean-Laupretre-Monnerie (DLM) model to study the effects of charge density on the local chain dynamics. The activation energy, E*, associated with a potential barrier for conformational transition was examined. E* was evaluated by subtracting the activation energy of solvent viscosity from the apparent activation energy. The mechanisms of local motion as reflected in the correlation function were independent of temperature.

Original languageEnglish
Pages (from-to)87-89
Number of pages3
JournalPolymer Journal
Volume32
Issue number1
DOIs
Publication statusPublished - 2000

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

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