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Titolo:
CURIE TRANSITION, FERROELECTRIC CRYSTAL-STRUCTURE, AND FERROELECTRICITY OF A VDF TRFE(75/25) COPOLYMER .1. THE EFFECT OF THE CONSECUTIVE ANNEALING IN THE FERROELECTRIC STATE ON CURIE TRANSITION AND FERROELECTRIC CRYSTAL-STRUCTURE/
Autore:
KIM KJ; KIM GB; VANLENCIA CL; RABOLT JF;
Indirizzi:
KYUNG HEE UNIV,COLL ENGN,DEPT TEXT ENGN,1 SEOCHUN RI KYONGGI DO 449701 SOUTH KOREA IBM CORP,ALMADEN RES CTR SAN JOSE CA 95120
Titolo Testata:
Journal of polymer science. Part B, Polymer physics
fascicolo: 15, volume: 32, anno: 1994,
pagine: 2435 - 2444
SICI:
0887-6266(1994)32:15<2435:CTFCAF>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
FLUORIDE-TRIFLUOROETHYLENE COPOLYMERS; VINYLIDENE-FLUORIDE; PHASE-TRANSITION; CO-POLYMERS; DIELECTRIC-PROPERTIES; PRESSURE-DEPENDENCE; BEHAVIOR; PIEZOELECTRICITY; SAMPLES; POINT;
Keywords:
VDF/TRFE COPOLYMER; CURIE TRANSITION; CONSECUTIVE ANNEALING IN THE FERROELECTRIC STATE; RAMAN SPECTROSCOPY; FAR-INFRARED SPECTROSCOPY; DSC;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
25
Recensione:
Indirizzi per estratti:
Citazione:
K.J. Kim et al., "CURIE TRANSITION, FERROELECTRIC CRYSTAL-STRUCTURE, AND FERROELECTRICITY OF A VDF TRFE(75/25) COPOLYMER .1. THE EFFECT OF THE CONSECUTIVE ANNEALING IN THE FERROELECTRIC STATE ON CURIE TRANSITION AND FERROELECTRIC CRYSTAL-STRUCTURE/", Journal of polymer science. Part B, Polymer physics, 32(15), 1994, pp. 2435-2444

Abstract

We have completely deconvoluted multiple ferroelectric-to-paraelectric phase transitions of a VDF/TrFE copolymer often observed on DSC by consecutive annealing below the Curie transition temperature and obtained three clear endothermic peaks resolved well from each other. We could also increase the Curie transition temperature by using the consecutive annealing performed in the ferroelectric state. Annealing time, as well as annealing temperature, was found to affect the Curie transition behavior significantly. Each ferroelectric crystalline phase was characterized by IR, Raman scattering, x-ray diffraction, and DSC measurements. The ferroelectric phase, having higher Curie transition temperature, has been found to have more trans sequences and less gauche defects and to require larger thermal energy for the Curie transition. (C) 1994 John Wiley and Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 12:05:19