NDLI: Mechanical and electrical properties of laminated polytetrafluoroethylene films

Content Provider	IEEE Xplore Digital Library
Author	Xuewen Wang Kexing Lou Xiaoqing Zhang Zhuanlan Sun Gongxun Cao Zhongfu Xia
Copyright Year	1994
Abstract	Laminated polytetrafluoroethylene (PTFE) films, which are made of compact and porous PTFE layers, are prepared through the process of sintering. The corona charging technique is utilized to make the laminated PTFE films piezoelectric, thus transforming them into piezoelectrets. The crystallinity, Young's modulus in compression mode, stress-strain behavior, charge dynamics, and thermal stability of the fabricated films are investigated by particular techniques, such as differential scanning calorimetry (DSC), dielectric resonance spectra, dynamic mechanical analysis (DMA), thermally stimulated discharge (TSD) spectra, and isothermal annealing, respectively. The results reveal that the crystallinity of the fabricated PTFE films with three and five-layer systems are 79.5 and 59.8 %, respectively. The compressive and tensile moduli at room temperature are 7.4 and 167 MPa for the three-layer system samples. The resulting temperature peak increases by 20°C as the heating rate increases from 2 to 4°C in TSD measurement. Two charge drift mechanisms exist in the films when the samples are thermally stimulated and discharged. With the increase of corona charging voltage from -10 to -25 kV, more and more detrapped charges from the deeper traps in the laminated PTFE films are released, corresponding to the current peaks identified in the temperature range from 130 to 140°C, which prefer to drift through the solid PTFE layers. However, charges also escaped from the relevant shallow traps, corresponding to the current peaks identified in the temperature that range from 80 to 95°C. The charge drift along the surface of the PTFE fibers is always a dominant mechanism, showing resistance of the corona charging voltage under the experimental-study conditions. The sample shows a stable piezoelectric d₃₃ coefficient of 50 pC/N at 120°C after one day annealing at the same temperature.
Sponsorship	National Natural Science Foundation of China (NSFC) Region Centre Ville de Tours Conseil General D'Indre et Loire ABB IEEE Sandia National Laboratories TOSHIBA
File Size	369533
File Format	PDF
ISSN	10709878
Volume Number	18
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-02-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Films Thermal stability Corona Heating Mechanical factors Dielectrics Solids thermal stability Polytetrafluoroethylene piezoelectret mechanical property electric property
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Piezoelectricity and dynamic characteristics of laminated fluorocarbon films

Charge storage and transport in oriented and non-oriented polytetrafluoroethylene films

Electret properties of polyethylene and polytetrafluoroethylene films with chemically modified surface

Influence of aging on electrical properties of polyethylene naphthalate-2,6 dicarboxylate films

Erosion resistance and mechanical properties of silicone nanocomposite insulation

Multifactor Stress

Poling dynamics and thermal stability of FEP/ePTFE/FEP sandwiches

Corona: insulation's silent enemy. I

Electrical and Thermal Properties of Carbon-Nanotube Composite for Flexible Electric Heating-Unit Applications

Mechanical and electrical properties of laminated polytetrafluoroethylene films

Similar Documents

Piezoelectricity and dynamic characteristics of laminated fluorocarbon films

Charge storage and transport in oriented and non-oriented polytetrafluoroethylene films

Electret properties of polyethylene and polytetrafluoroethylene films with chemically modified surface

Influence of aging on electrical properties of polyethylene naphthalate-2,6 dicarboxylate films

Erosion resistance and mechanical properties of silicone nanocomposite insulation

Multifactor Stress

Poling dynamics and thermal stability of FEP/ePTFE/FEP sandwiches

Corona: insulation's silent enemy. I

Electrical and Thermal Properties of Carbon-Nanotube Composite for Flexible Electric Heating-Unit Applications

Mechanical and electrical properties of laminated polytetrafluoroethylene films