Jain, A and Kumar, JS and Srikanth, S and Rathod, VT and Mahapatra, Roy D (2012) Sensitivity of polyvinylidene fluoride films to mechanical vibration modes and impact after optimizing stretching conditions. In: Polymer Engineering and Science, 53 (4). pp. 707-715.
Restricted to Registered users only
The Î²-phase of polyvinylidene fluoride (PVDF) is well known for its piezoelectric properties. PVDF films have been developed using solvent cast method. The films thus produced are in Î±-phase. The Î±-phase is transformed to piezoelectric Î²-phase when the film is hot-stretched with various different stretching factors at various different temperatures. The films are then characterized in terms of their mechanical properties and surface morphological changes during the transformation from Î±- to Î²-phases by using X-ray diffraction, differential scanning calorimeter, Raman spectra, Infrared spectra, tensile testing, and scanning electron microscopy. The films showed increased crystallinity with stretching at temperature up to 80Â°C. The optimum conditions to achieve Î²-phase have been discussed in detail. The fabricated PVDF sensors have been tested for free vibration and impact on plate structure, and its response is compared with conventional piezoelectric wafer type sensor. The resonant and antiresonant peaks in the frequency response of PVDF sensor match well with that of lead zirconate titanate wafer sensors. Effective piezoelectric properties and the variations in the frequency response spectra due to free vibration and impact loading conditions are reported. POLYM. ENG. SCI., 2012. Â© 2012 Society of Plastics Engineers.
|Item Type:||Journal Article|
|Additional Information:||Copyright for this article belongs to John Wiley & Sons, Inc.|
|Department/Centre:||Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)|
|Date Deposited:||19 Sep 2012 08:45|
|Last Modified:||22 Apr 2013 05:20|
Actions (login required)