Paper Type |
Contributed Paper |
Title |
Dynamic 2D-FTIR Spectroscopic Studies of Poly(Vinylidine Fluoride/T rifluoroethylene/Chloro trifluoroethylene), P(VDF/T rFE/CTFE) T erpolymer |
Author |
Pakorn Opaprakasit [a]*, Atitsa Petchsuk [b], Paul C. Painter [c], and Sergei Malkov [c |
Email |
pakorn@siit.tu.ac.th |
Abstract: P(VDF/TrFE/CTFE) terpolymers are electrostrictive, converting electrical energy to mechanical energy by a transformation between ferroelectric and paraelectric phases. This transformation occurs as a result of a change in conformation of the polymer backbone. In this study, Dynamic IR Linear Dichroism (DIRLD) spectroscopy, which provides useful information on the local structure of a polymer that interacts and responds to external perturbation, was used to measure the time-dependent IR response to sinusoidal strain. The major advantage of this technique over normal FTIR experiments is that it provides information correlating the IR response of each functional group with the applied mechanical strain and allows a comparison to the IR response of other functional groups. The DIRLD spectra of isotropic and uniaxially drawn (3:1 ratio) films were studied. A sinusoidal strain was applied to a film in the direction parallel to the direction of chain alignment. Information about the reorientation of the electric dipole-transition moments relative to the polarization direction of the infrared beam was obtained. In addition, the dichroic DIRLD spectra were generated. The results obtained from the uniaxially drawn sample provide the time-dependent IR responses, and the relative direction of electric dipole-transition reorientations of functional groups in both amorphous and crystalline domains.
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Start & End Page |
515 - 519 |
Received Date |
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Revised Date |
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Accepted Date |
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Full Text |
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Keyword |
2D-FTIR, crystal structure, Dynamic IR Linear Dichroism spectroscopy, electric dipole transition, P(VDF/TrFE/CTFE), piezoelectric polymer, sinusoidal strain |
Volume |
Vol.32 No.3 (SEPTEMBER 2005) |
DOI |
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Citation |
Opaprakasit P.., Petchsuk A.., Painter P..C.. and [c S..M.., Dynamic 2D-FTIR Spectroscopic Studies of Poly(Vinylidine Fluoride/T rifluoroethylene/Chloro trifluoroethylene), P(VDF/T rFE/CTFE) T erpolymer, Chiang Mai J. Sci., 2005; 32(3): 515-519. |
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