Far-infrared spectra of piezoelectric polyvinylidene fluoride

Autor:	J. P. Luongo
Rok vydání:	1972
Předmět:	chemistry.chemical_classification Materials science business.industry Polymer Dichroism Piezoelectricity Polyvinylidene fluoride Crystallography chemistry.chemical_compound Optics Far infrared chemistry Perpendicular Molecule business Spectroscopy
Zdroj:	Journal of Polymer Science Part A-2: Polymer Physics. 10:1119-1123
ISSN:	1542-9377 0449-2978
Popis:	Poly(vinylidene fluoride) (PVF2) is currently used to form piezoelectric films. The PVF2 molecule can exist in more than one stable conformation and it has electrically polar groups making the polymer amenable to the electrification processes involved in the formation of the piezoelectric film. The two crystalline forms of PVF2 are distinguishable by far-infrared spectroscopy. Polarized far-infrared spectra (1000-50 cm−1) of uniaxially oriented PVF2 show changes in the strong perpendicular dichroism in a number of absorptions before and after being made piezoelectric. The dichroism is attributed to a structural rearrangement from a staggered trans-gauche-trans-gauche conformation to a planar zig zag conformation. In the latter conformation the permanent dipoles are oriented approximately at right angles to the surfaces of the film and result in an electrically polarized film.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d15a4b41cbc85bbaa3c44e4da286d2a0 https://doi.org/10.1002/pol.1972.160100613 Zobrazit plný text záznamu Plný text