Dielectric relaxational behavior of poly(diitaconate)s containing cyclic rings in the side chain

• Published in: Journal of polymer science. Part B, Polymer physics Polymer physics, 2003-05, Vol.41 (10), p.1059-1069
• Main Authors: Díaz-Calleja, R., García-Bernabé, A., Sánchez-Martínez, E., Sanchis, M. J., Hormazábal, E. A., Gargallo, L., Radić, D.
• Format: Article
• Language: English
• Subjects: Applied sciences; conductivity effects; conformational versatility; cyclic rings; dielectric; dielectric relaxation; Electrical, magnetic and optical properties; Exact sciences and technology; Organic polymers; Physicochemistry of polymers; poly(dicyclobutyl itaconate); poly(dicycloheptyl itaconate); poly(dicyclooctyl itaconate); Properties and characterization; relaxations; subglass relaxation
• ISSN: 0887-6266; 1099-0488
• DOI: 10.1002/polb.10434

Dielectric relaxations of several poly(diitaconate)s with cyclobutyl, cycloheptyl, and cyclooctyl groups in the side chain were investigated. The study was performed by determining the dielectric permittivity and loss, depending on the frequency and temperature. Dynamic dielectric measurements indicated several relaxations according to the chemical structure of the polymers. The dielectric behavior of these polymers was compared with those of poly(dicyclohexyl itaconate), previously reported. The α relaxations were analyzed with the Havriliak–Negami equation. Significant differences in the subglass relaxations were observed. A tentative explanation of the molecular origin of each absorption was proposed in terms of the number of carbon atoms of the ring and their conformational versatility. Strong conductive processes were observed in these polymers at low frequencies and high temperatures. © 2003 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 41: 1059–1069, 2003