Abstract
AC electrical behavior of a novel aromatic electro-optic polyimide was investigated in the temperature range 25-300°C and a frequency range 1 Hz - 1 MHz. The measurements were performed on a polymer thin film casted onto ITO glass. The imaginary and real components of resistivity, permittivity and electric modulous were determined. The results show that the polymer has high thermal stability below 200°C, where the resistivity, dielectric constant and permittivity are nearly temperature-independent indicating highly rigid structure. Above the temperature, however, a well defined broad peak corresponding to a relaxation transition process was observed for which the activation energy was calculated to be approx.8.5 Kcal/mole. This relaxation is associated with a restricted local rotational motion of the side chain chromophore.
Original language | English |
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Pages (from-to) | 324 |
Number of pages | 1 |
Journal | Polymeric Materials Science and Engineering, Proceedings of the ACS Division of Polymeric Materials Science and Engineering |
Volume | 76 |
Publication status | Published - 1997 |
Event | Proceedings of the 1997 Spring ACS Meeting - San Francisco, CA, USA Duration: Apr 13 1997 → Apr 17 1997 |
ASJC Scopus subject areas
- Chemical Engineering (miscellaneous)
- Polymers and Plastics