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Titolo:
Bending electrostriction in polyurethane using in situ ultraviolet and visible spectroscopies
Autore:
Watanabe, M; Shirai, H; Hirai, T; Suzuki, M; Hirako, Y;
Indirizzi:
Shinshu Univ, Fac Text Sci & Technol, Nagano 3868567, Japan Shinshu Univ Nagano Japan 3868567 t Sci & Technol, Nagano 3868567, Japan Nitta Ind Corp, Narayama Lab, Nara 6310801, Japan Nitta Ind Corp Nara Japan 6310801 orp, Narayama Lab, Nara 6310801, Japan
Titolo Testata:
JOURNAL OF APPLIED PHYSICS
fascicolo: 9, volume: 88, anno: 2000,
pagine: 5328 - 5333
SICI:
0021-8979(20001101)88:9<5328:BEIPUI>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTRIC-FIELD; ELASTOMER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Watanabe, M Shinshu Univ, Fac Text Sci & Technol, 3-15-1 Tokida, Nagano 3868567, Japan Shinshu Univ 3-15-1 Tokida Nagano Japan 3868567 868567, Japan
Citazione:
M. Watanabe et al., "Bending electrostriction in polyurethane using in situ ultraviolet and visible spectroscopies", J APPL PHYS, 88(9), 2000, pp. 5328-5333

Abstract

We measured the ultraviolet and visible spectra of polyurethane films while a high electric field (2 MV/m) was applied to the films in order to investigate the detailed mechanism of the bending electrostriction. The polyurethane films were composed of segmented polyester polyurethane to which a small amount of sodium acetate (similar to 10(-4) mol/kg) was added. The filmshad similar to 9-nm-thick gold electrodes on both surfaces. The obtained spectra showed reversible absorption that appeared during the application ofthe electric field and disappeared with its removal. The response of the absorption to the field application was very similar to that of the film's bending due to the bending electrostriction. This suggests that the reversible absorption is directly related to the mechanism of the bending electrostriction. We also demonstrated that the absorption was attributed to the moiety "Ph-NH-COO" on the polyurethane, suggesting that this moiety is a trap site of injected charges that can be considered the cause of the bending electrostriction. <(C)> 2000 American Institute of Physics. [S0021-8979(00)05122-7].

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Documento generato il 05/12/20 alle ore 13:37:36