Title :
Piezoelectric activity in cross-linked polypropylene films stretched at elevated temperature
Author :
Zhang, Xiaobing ; Pan, D. ; Xia, Zhihua ; Ang, Y.Z.
Author_Institution :
Dept. of Phys., Tongji Univ., Shanghai, China
Abstract :
The charging capability and Young´s modulus of XPP films can be modified by a hot-stretching process. The results show that the onset of piezoelectricity occurs at an elongation ratio of 70% and enhances with the increase of this ratio. A quasistatic piezoelectric d33-coefficient of 308pC/N is achieved for samples with an elongation ratio of 200% and a Young´s modulus of 0.54MPa. An improved piezoelectric d33-coefficient is obtained for samples with a rough surface exposed to the corona during charging.
Keywords :
Young´s modulus; elongation; piezoelectricity; polymer films; XPP films; Young´s modulus; charging capability; corona; cross-linked polypropylene films; elevated temperature; elongation ratio; hot-stretching process; piezoelectric activity; piezoelectricity; pressure 0.54 MPa; quasistatic piezoelectric coefficient; Corona; Dielectrics; ISO standards;
Conference_Titel :
Electrets (ISE), 2011 14th International Symposium on
Conference_Location :
Montpellier
Print_ISBN :
978-1-4577-1023-0
DOI :
10.1109/ISE.2011.6085038
