Thermal and dielectric behavior of flexible polycarbonate/lead zirconate titanate composite system

• Published in: Journal of applied polymer science 2014-02, Vol.131 (4), p.n/a
• Main Authors: Sain, P. K., Goyal, R. K., Bhargava, A. K., Prasad, Y.V.S.S.
• Format: Article
• Language: English
• Subjects: amorphous; Applied sciences; Composites; dielectric properties; Exact sciences and technology; Forms of application and semi-finished materials; Materials science; morphology; polycarbonates; Polymer industry, paints, wood; Polymers; properties and characterization; Technology of polymers
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.39913

ABSTRACT Polycarbonate (PC)/Lead Zirconate Titanate (PZT) composites were prepared using solution mixing method followed by hot pressing. The volume fraction of PZT particles was varied from 0 to 27.5%. SEM showed good dispersion of PZT in the PC matrix. XRD confirmed the perovskite structure of PZT and amorphous structure of polycarbonate. The dielectric constant of the composites measured at 1 kHz, increased ∼3.5‐fold compared with pure PC. The modified Lichtenecker equation agreed well with the experimental data. There was no dispersion in the dielectric constant of the composites for the frequency range of 1 kHz to 10 MHz. However, at frequencies higher than 10 MHz significant drop in dielectric constant was observed. The dissipation factor of the composites was found below 0.02. However, above 1 MHz, an abrupt increment in the dissipation factor was observed. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 39913.