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Crystal phase of poly(vinylidene fluoride‐ co ‐trifluoroethylene) synthesized via hydrogenation of poly(vinylidene fluoride‐ co ‐chlorotrifluoroethylene)
Author(s) -
Zhang Qiuping,
Xia Weimin,
Zhu Zhigang,
Zhang Zhicheng
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.37975
Subject(s) - chlorotrifluoroethylene , materials science , differential scanning calorimetry , fluoride , fourier transform infrared spectroscopy , phase (matter) , crystal (programming language) , polymer chemistry , phase transition , crystal structure , analytical chemistry (journal) , polymer , crystallography , chemical engineering , chemistry , composite material , copolymer , organic chemistry , inorganic chemistry , tetrafluoroethylene , thermodynamics , physics , computer science , engineering , programming language
Trifluoroethylene addition and thermal treatment induced crystal phase transition in a series of poly(vinylidene fluoride‐ co ‐trifluoroethylene) [P(VDF‐ co ‐TrFE)] containing varied TrFE molar ratio (6, 9, 12, and 20 mol %) prepared from the hydrogenation of poly(vinylidene fluoride‐ co ‐chlorotrifluoroethylene have been investigated by means of Fourier transform infrared spectral (FTIR), X‐ray diffraction (XRD), and differential scanning calorimetry (DSC) analyses. The comprehensive applications of the three techniques could distinguish α, β and γ phase of P(VDF‐ co ‐TrFE) very well. The multipeak fitting technique of DSC is successfully applied to calculate the percentage of different phases in the samples, which allows us to investigate the phase transition process of P(VDF‐ co ‐TrFE) precisely. It is found that the crystal phase of P(VDF‐ co ‐TrFE) films is turned from α + γ phase (6 mol % TrFE) to α + γ + β phase (9 and 12 mol % TrFE) to β phase (20 mol % TrFE) at high temperature, and from α + γ phase (6 mol % TrFE) to γ + β phase (9 mol % TrFE) to β phase (>12 mol % TrFE) at low fabricated temperature. Both the fabrication conditions and TrFE addition are responsible for the crystal phase transition of the hydrogenised P(VDF‐ co ‐TrFE). © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013