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  4. Dielectric behaviour and conductivity of high-filled BaTiO3-PMMA composites and the facile route of emulsion polymerization in synthesizing the same
 
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Dielectric behaviour and conductivity of high-filled BaTiO3-PMMA composites and the facile route of emulsion polymerization in synthesizing the same

Publikationstyp
Journal Article
Date Issued
2013-05-21
Sprache
English
Author(s)
Brandt, Kristina  
Neusel, Claudia  
Behr, Sebastian  
Schneider, Gerold A.  
Institut
Keramische Hochleistungswerkstoffe M-9  
TORE-URI
http://hdl.handle.net/11420/6854
Journal
Journal of materials chemistry / C  
Volume
1
Issue
18
Start Page
3129
End Page
3137
Citation
Journal of Materials Chemistry C 18 (1): 3129-3137 (2013)
Publisher DOI
10.1039/c3tc30204k
Scopus ID
2-s2.0-84879516792
Publisher
Royal Society of Chemistry
Poly(methyl methacrylate)-BaTiO3 composites were prepared by a combined process of free radical emulsion polymerization and hot pressing. Using a cationic surfactant, emulsion polymerization was proven to be an easy and fast method to synthesize core-shell hybrid particles. By subsequent hot pressing of powders with different amounts of polymers, composites with barium titanate filler contents up to 65 vol% with uniform microstructures could be achieved, as determined by thermogravimetric analysis and scanning electron microscopy. The dielectric properties were characterized for frequencies and temperatures ranging from 100 Hz to 1 MHz and -30 to 80 °C, respectively. Composites exhibited a significant increase in dielectric constant up to 85 with BaTiO3 content and low loss tangents of 0.06 at 1 kHz. Dc conductivity measurements reveal increasing leakage currents with BaTiO 3 contents, enhanced by cationic surfactant influences.
DDC Class
540: Chemie
Funding(s)
SFB 986: Teilprojekt A6 - Herstellung und Charakterisierung hierarchischer, multi-funktionaler Keramik/Metall-Polymer Materialsysteme  
More Funding Information
Hamburg, Behörde für Wissenschaft und Forschung
Joachim Hertz Foundation of the Hamburg Initiative for Excellence in Research (LEXI)
TUHH
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