DocumentCode :
1881468
Title :
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
Link To Document :
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