Influence of Humidity on Dielectric Properties of PMMA Nanocomposites Containing Onion-Like Carbon

Autor:	Polina Kuzhir, Gintaras Valušis, Vladimir L. Kuznetsov, Dalius Seliuta, Ph. Lambin, Jan Macutkevic, Sergey I. Moseenkov, J. Banys, Olga Shenderova, Sergey A. Maksimenko
Rok vydání:	2009
Předmět:	Permittivity Materials science Nanocomposite Relaxation (NMR) Composite number chemistry.chemical_element Dielectric Atmospheric temperature range Condensed Matter Physics Electronic Optical and Magnetic Materials chemistry Composite material Glass transition Carbon
Zdroj:	Ferroelectrics. 391:131-138
ISSN:	1563-5112 0015-0193
DOI:	10.1080/00150190903004601
Popis:	Results of broadband dielectric spectroscopy (20 Hz-1 MHz) of a novel polymer composite based on onion-like carbon (OLC) are presented. The measurements were performed by cooling and heating in a wide temperature range (240 K-420 K). After heating the dielectric permittivity strongly increases, β relaxation slows down while γ relaxation becomes negligible. The observed behaviour of relaxations suggests that dielectric properties of presented composite without additional heating are strongly influenced by extrinsic humidity. The increase of the OLC fillers concentration (up to 1 wt%) has been found to strongly increases the glass transition temperature of OLC-based polymethyl methacrylate (PMMA) composite, however, an effect of the OLC inclusions on the beta transition of the given nanocomposites is less expressed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c229f0974c1771621a6ad79c66627725 https://doi.org/10.1080/00150190903004601 Zobrazit plný text záznamu