Sensitivity of polyvinylidene fluoride films to mechanical vibration modes and impact after optimizing stretching conditions

被引：18
作者：
Jain, Anjana [1 ]
Kumar, Jayanth S. [1 ]
Srikanth, S. [1 ]
Rathod, V. T. [2 ]
Mahapatra, D. Roy [2 ]
机构：
[1] Natl Aerosp Labs, Div Mat Sci, Bangalore 560017, Karnataka, India
[2] Indian Inst Sci, Dept Aerosp Engn, Bangalore 560012, Karnataka, India
来源：
POLYMER ENGINEERING AND SCIENCE | 2013年 / 53卷 / 04期
关键词：
POLY(VINYLIDENE FLUORIDE); DIELECTRIC-PROPERTIES; CRYSTALLINE PHASE; THIN-FILMS; PVDF; TEMPERATURE; PIEZOELECTRICITY; DEPENDENCE;
D O I：
10.1002/pen.23318
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The -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 -phase. The -phase is transformed to piezoelectric -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 - to -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 80 degrees C. The optimum conditions to achieve -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., 2013. (c) 2012 Society of Plastics Engineers
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收藏
页码：707 / 715
页数：9
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