Heat capacity and vibrational dynamics of polyvinylidene fluoride (β-form)

Autor:	Archana Gupta, Parag Agarwal, Saba Bee, Poonam Tandon, V. D. Gupta
Rok vydání:	2011
Předmět:	chemistry.chemical_classification Materials science Polymers and Plastics Analytical chemistry Thermodynamics Polymer Polyvinylidene fluoride Heat capacity Piezoelectricity Force field (chemistry) Pyroelectricity chemistry.chemical_compound chemistry Normal mode Materials Chemistry Matrix method
Zdroj:	Polymer Science Series A. 53:375-384
ISSN:	1555-6107 0965-545X
DOI:	10.1134/s0965545x11050051
Popis:	Polyvinylidene fluoride (PVDF) is a polymer of industrial importance, mainly due to its piezoelectric and pyroelectric properties. A comprehensive study of the normal modes and their dispersion in PVDF (β-form) has been reported in the reduced zone scheme using Wilson’s GF matrix method as modified by Higgs. A Urey-Bradley force field has been used. The evaluation of normal modes and their dispersion has been taken to logical conclusion by calculating the heat capacity as a function of temperature. The extent of agreement with the experimental data supports the potential field. Characteristic features of the dispersion curves such as repulsion and exchange of character have also been discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4d670ce68826a5a9b1b47d369e0b813b https://doi.org/10.1134/s0965545x11050051 Zobrazit plný text záznamu Full text from SpringerLink