Dielectric relaxation of polyorganophosphazenes |
| |
| Authors: | Ichiro Murakami Hiroshi Ochiai Kazuyuki Tominaga and Meisetsu Kajiwara |
| |
| Affiliation: | (1) Faculty of Science, Okayama University of Science, 700 Okayama, Japan;(2) Department of Chemistry, Faculty of Science, Hiroshima University, 730 Hiroshima, Japan;(3) Department of Applied Chemistry, Faculty of Engineering, Nagoya University, 464 Nagoya, Japan |
| |
| Abstract: | Dielectric relaxation spectra of poly(bis-trifluoroethoxy phosphazene) (PBFP), poly(bis-n-propoxy phosphazene) (PBPP), and poly(bis-n-propylamino phosphazene) (PBPAP) were measured in wide temperature and frequency regions, and the  -relaxation caused by micro-Brownian motion of segments in the rubbery state and the  -relaxation due to the local motions of the polymer in the glassy region were observed. The dielectric spectra of PBFP at temperatures higher than the rubbery region exhibited a mesophase transition at 358 K. From conformation analysis according to the two-site model, it has been elucidated that the mechanism for -relaxation of these samples is hindered internal rotation of the side groups. |
| |
| Keywords: | Polyorganophosphazene dielectric relaxation two-site model conformation analysis |
| 本文献已被 SpringerLink 等数据库收录！ |
|
