| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5008494 | Sensors and Actuators A: Physical | 2016 | 6 Pages |
â¢Sensors can be obtained from fluorinated polyphosphazenes with MW exceeding 106.â¢Fluorinated poly(organophosphazenes) are natural electrets.â¢Doping polyphosphazenes allows for reaching modulus comparable with piesoceramics.â¢Model polyphosphazene based pressure sensor and flexure actuator were designed.
Piezoelectric, electrete and actuator properties for series of fluorinated polyorganophosphazenes, synthesized in conditions of defectless macromolecules formation with molecular weights exceeding 106 have been studied. It was shown that majority of polymers under consideration are natural electretes, i.e., they generate electrical charge at deformation before treatment in corona charge. Doping the samples with lithium triflate salt increases piezoelectric modulus d31 as before, as after polarization at moderate voltage. In the last case the value of the modulus is comparable with inherent for piesoceramics. Stability and reproducibility of piezoelectric characteristics were also characterized. The actuator response in bending strain was investigated. The model devices reflecting piezoeffect (pressure sensor) and electrostriction (flexure actuator) were constructed. The last one is demonstrated in the paper.
