Molecular mobility in polyaniline studied by ESR method

Author

Kulikov, A.V. ; Kogan, Ya.L. ; Fokeeva, L.S.

Author_Institution

Russian Academy of Sciences

fYear

1994

fDate

24-29 July 1994

Firstpage

58

Lastpage

58

Abstract

Summary form only given. For emeraldine salts of polyaniline (ES), segmental motions in precipitated ES and large-scale rearrangements of ES globules in solutions of polyaniline in N-methylpyrrolidinone (NMP) were found, in spite of the formation of salt bridges between polyaniline chains. For precipitated ES it was found that the asymmetry of the Dysonian ESR line correlates with macroviscosity of solvent. This observation reveals the important role of segmental motions of polyaniline chains in conductivity of ES at microwave frequency. For solutions of ES in NMP the broadening of the ESR lines at room temperature and 77 K -was found at dilution of the solutions. In this experiment the concentration of formic acid was kept constant. This observation shows the increase of the distances between paramagnetic centers of ES with the dilution.

Keywords

Bridges; Chemicals; Large-scale systems; Magnetic fields; Paramagnetic materials; Paramagnetic resonance; Physics; Polymers; Solitons; Solvents;

fLanguage

English

Publisher

ieee

Conference_Titel

Science and Technology of Synthetic Metals, 1994. ICSM '94. International Conference on

Conference_Location

Seoul, Korea

Type

conf

DOI

10.1109/STSM.1994.834732

Filename

834732