DocumentCode
1075609
Title
Structural Changes in Poly (Vinylidene Fluoride) by Electric Fields
Author
Geiss, D. ; Danz, R. ; Janke, A. ; Künstler, W.
Author_Institution
Institut of Polymer Chemistry "Erich Correns" Tel tow-Seehof, Germany
Issue
3
fYear
1987
fDate
6/1/1987 12:00:00 AM
Firstpage
347
Lastpage
351
Abstract
Uniaxially stretched poly (vinylidene fluoride) (PVDF) films, containing 6 phase only or both ¿ and B phases, as well as 12 pm biaxially oriented commercial PVDF films were investigated by means of modified x-ray and infrared techniques. The structural changes were examined in response to the applied poling field ( 450 MV/m) and the poling tem perature at various levels. The changes in the orientation state determined by pole-figure measurements, the various crystal phase transitions, the conformational conversion from TGTG to TT, and the increase of crystallinity in the S phase are discussed in comparison with the piezoelectric strain and stress coefficients d31 and e31.
Keywords
Chemistry; Crystallization; Electrodes; Phase measurement; Piezoelectric films; Piezoelectric polarization; Polymer films; Strain measurement; Stress measurement; Temperature dependence;
fLanguage
English
Journal_Title
Electrical Insulation, IEEE Transactions on
Publisher
ieee
ISSN
0018-9367
Type
jour
DOI
10.1109/TEI.1987.299001
Filename
4081419
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