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Crystallization behavior and phase‐transformation mechanism with the use of graphite nanosheets in poly(vinylidene fluoride) nanocomposites
Author(s) -
Zhang Y. Y.,
Jiang S. L.,
Yu Y.,
Zeng Y. K.,
Zhang G. Z.,
Zhang. Q. F.,
He J. G.
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.35627
Subject(s) - materials science , crystallization , differential scanning calorimetry , phase (matter) , nanocomposite , chemical engineering , fourier transform infrared spectroscopy , graphite , exfoliation joint , polymer chemistry , composite material , graphene , nanotechnology , chemistry , organic chemistry , physics , engineering , thermodynamics
Poly(vinylidene fluoride) (PVDF)–graphite nanosheet (GNS) nanocomposites with different contents of GNSs were prepared by the solution‐casting method. The GNSs were produced by the ultrasonic exfoliation of graphite. The effects of GNSs on the crystalline structure, degree of the crystallization, conductivity, and phase‐transformation mechanism of PVDF were investigated. Atomic force microscopy data showed that the GNSs had a flake‐shaped nanostructure. Fourier transform infrared spectroscopy and X‐ray diffraction results revealed that a β phase formed with the addition of GNSs, and the phase‐transformation mechanism from the α phase to the β phase of PVDF was confirmed. Differential scanning calorimetry results indicated that addition of GNSs led to an increased melting temperature and increased degree of crystallization; this implied that the GNSs acted as nucleating agents. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012