PolyU IR
 

PolyU Institutional Repository >
Applied Physics >
AP Journal/Magazine Articles >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/500

Title: Structural evolution and dielectric relaxation behavior of electron-irradiated poly(vinylidene fluoride-trifluoroethylene) 80/20 mol% copolymers
Authors: Guo, Shishang
Lau, Sien Ting
Chan, Helen L. W.
Zhao, Xingzhong
Choy, Chung-loong
Subjects: Polymer blends
Polymer films
Relaxor ferroelectrics
Permittivity
Dielectric relaxation
Dielectric hysteresis
Differential scanning calorimetry
X-ray diffraction
Ferroelectric transitions
Electron beam effects
Polymer structure
Issue Date: 1-Nov-2003
Publisher: American Institute of Physics
Citation: Journal of applied physics, 1 Nov. 2003, v. 94, no. 9, p.5566-5573.
Abstract: The effect of high-energy electron irradiation on poly(vinylidene fluoride-trifluoroethylene) 80/20 mol% copolymers has been studied in a broad dose ranging from 0 to 120 Mrad. It was found that the copolymers transformed from a normal ferroelectric to a relaxor ferroelectric phase (RFE) at high electron doses. For copolymers irradiated at the dose above 90 Mrad, they exhibited typical dielectric behavior of RFE, e.g., whose dielectric constant peaks show strong frequency dispersion. X-ray diffraction patterns showed that the irradiation induced a coexistence of the polar and nonpolar phase in the crystalline regions, leading to nanosized coherent regions in the irradiated copolymer films. Differential scanning calorimetery and polarization hysteresis loops also revealed the reduction in the crystallinity and stability of the ferroelectric state, reflecting significant changes in the ferroelectric-to-paraelectric phase transition due to the effect of high-energy electron irradiation.
Rights: © 2003 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in S.S. Guo et al. J. Appl. Phys. 94, 5566 (2003) and may be found at http://link.aip.org/link/?jap/94/5566
Type: Journal/Magazine Article
URI: http://hdl.handle.net/10397/500
ISSN: 00218979
Appears in Collections:MRC Journal/Magazine Articles
AP Journal/Magazine Articles

Files in This Item:

File Description SizeFormat
electron-irradiated_03.pdf157.56 kBAdobe PDFView/Open



Facebook Facebook del.icio.us del.icio.us LinkedIn LinkedIn


All items in the PolyU Institutional Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
No item in the PolyU IR may be reproduced for commercial or resale purposes.

 

© Pao Yue-kong Library, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
Powered by DSpace (Version 1.5.2)  © MIT and HP
Feedback | Privacy Policy Statement | Copyright & Restrictions - Feedback