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Effect of calcination temperature of TiO 2 on the crystallinity and the permittivity of PVDF‐TrFE/TiO 2 composites
Author(s) -
Kuang Xiwen,
Gao Qian,
Zhu Hong
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.38729
Subject(s) - crystallinity , materials science , calcination , composite material , dielectric , crystallization , scanning electron microscope , titanium dioxide , permittivity , dielectric loss , composite number , differential scanning calorimetry , chemical engineering , chemistry , biochemistry , physics , optoelectronics , engineering , thermodynamics , catalysis
Composite membranes of poly(vinylidene‐trifluoroethylene)/titanium dioxide (PVDF‐TrFE/TiO 2 ) were prepared by the solution cast method. The crystallization behavior and dielectric properties of the composites with TiO 2 calcined at different temperatures were studied. Transmission electron microscopy and X‐ray diffraction (XRD) results showed that the TiO 2 nanoparticles calcined at different temperatures were well dispersed in the polymer matrix and did not affect the structure of the PVDF‐TrFE matrix. XRD and differential scanning calorimeter measurements showed that the crystallinity of PVDF‐TrFE/TiO 2 composites increased as the addition of TiO 2 with different calcination temperatures. The dielectric property testing showed that the permittivity of PVDF‐TrFE/TiO 2 membrane increased rapidly with the increase of TiO 2 content and the calcination temperature of TiO 2 at constant TiO 2 content, but the dielectric loss did not change much. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013