Zone 연신 조건이 PVDF 필름의 압전성에 미치는 영향

Effects of Zone Drawing Conditions on Piezoelectricity of Poly(vinylidene Fluoride) Films

Mechanical and piezoelectrical properties of zone-draw poly(vinylidene fluoride) films were studied. Effects of draw ratio and drawing temperature on the mechanical and piezoelectrical behavior were investigated and they were compared with those of hot-drawn films. As draw ratio increases so does the piezoelectric strain constant, but the increase of piezolectric strain constant of zone-drawn films is higher than that of hot-drawn films. Drawing temperature seems to be independent of the piezolectric stain constant. The glass transition temperature determinded by mechanical experiment tends to increase with the increase of draw ratio but that determined by piezoelectrical experiment is independent of draw ratio. This result is the same in both hot and zone-drawn cases.