Effect of Synthesis Temperature in the Structure, Doping Level and Charge-Transport Properties of Polypyrrole
Abstract
Polypyrrole perchlorate was chemically synthesized at various temperatures and the resulting polymers were investigated by elemental analysis, fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and conductivity measurements. A correlation between conductivity, doping level and synthesis temperature was observed. The doping level of the polymer is higher when the synthesis is conducted at lower temperature exhibit longer conjugation length, fewer structural defects, higher charge carrier hopping frequency and higher conductivity. Furthermore, the results of this study indicate that the positive charges of doped polypyrrole are preferentially localized on the nitrogen atoms which are adjacent to the doping anions, as opposed to being uniformly delocalized along the polymer backbone.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 08, 1992
- Accession Number
- ADA250531
Entities
People
- Charles R. Martin
- Junting Lei
- Wenbin Liang
Organizations
- Colorado State University