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Dielectric properties of polystyrene based composites filled with core-shell BaTiO3/polystyrene hybrid nanoparticles.
- Source :
- IEEE Transactions on Dielectrics & Electrical Insulation; Aug2014, Vol. 21 Issue 4, p1438-1445, 8p
- Publication Year :
- 2014
-
Abstract
- In this work, core-shell structured BaTiO3/polystyrene nanoparticles (BT-PS) with different thickness of PS shell were synthesized through atom transfer radical polymerization and the influence of their shell thickness on dielectric properties of BTPS/ PS composites was studied. Two types of BT-PS with the PS shell of 3 nm or 12 nm were obtained by controlling the polymerization time. The structure of BT-PS was carefully characterized by infrared spectroscopy, X-ray diffraction, thermal gravimetric analysis, and transmission electron microscope. The results confirmed the successful preparation of core-shell BT-PS nanoparticles. Compared to pristine BT, the core-shell particles can be more homogeneously dispersed into PS matrix. As a result, higher dielectric constant, higher breakdown strength, and lower dielectric loss were achieved in BT-PS/PS composites. Moreover, the dielectric constant of BT-PS/PS composites displayed frequency independent behavior. In addition, the composites filled by BT-PS with 3 nm of PS shell showed better dielectric properties than those filled by BT-PS with 12 nm of PS shell. A maximum energy density as large as 4.24 J/cm3 was obtained in BT-PS/PS films. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 10709878
- Volume :
- 21
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Dielectrics & Electrical Insulation
- Publication Type :
- Academic Journal
- Accession number :
- 97673810
- Full Text :
- https://doi.org/10.1109/TDEI.2013.004329