Nanocomposites of polyvinylidene fluoride/polymethyl methacrylate (PVDF/PMMA) blend and mechanically activated barium titanate (BaTiO3) particles were prepared by melt mixing. Modification of filler by means of mechanical activation has a profound effect on the crystallization of PVDF in the blend matrix. Raman analysis showed that the modified BaTiO3 particles, due to higher specific surfaces, induce, predominantly, the crystallization of the electrically active β-phase of PVDF, while the initial micron size particles induce the formation of the most common but non-polar α-crystal form. The introduction of activated particles reduces the overall crystallinity but slightly affects the crystallization and melting temperatures of the matrix. Dielectric spectroscopy revealed that at fixed filler content the dielectric constant of the blend increases with decreasing of the particle size (increasing of the activation time). A similar trend was observed for the storage moduli in dynamic mechanical analysis; the stiffness of the composite was higher when mechanically activated particles were used.
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28 February 2014
Research Article|
February 26 2014
Ferroelectric nanocomposites of polyvinylidene fluoride/polymethyl methacrylate blend and BaTiO3 particles: Fabrication of β-crystal polymorph rich matrix through mechanical activation of the filler
Tladi G. Mofokeng;
Tladi G. Mofokeng
1
Department of Chemistry, University of Free State
, Private Bag X13, Phuthaditjhaba 9866, South Africa
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Adriaan S. Luyt;
Adriaan S. Luyt
1
Department of Chemistry, University of Free State
, Private Bag X13, Phuthaditjhaba 9866, South Africa
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Vera P. Pavlović;
Vera P. Pavlović
2
Faculty of Mechanical Engineering, University of Belgrade
, 11000 Belgrade, Serbia
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Vladimir B. Pavlović;
Vladimir B. Pavlović
3
Faculty of Agriculture, University of Belgrade
, 11000 Belgrade, Serbia
4
Institute of Technical Sciences, Serbian Academy of Sciences and Arts
, Belgrade, Serbia
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Duško Dudić;
Duško Dudić
1
Department of Chemistry, University of Free State
, Private Bag X13, Phuthaditjhaba 9866, South Africa
5
Vinča Institute of Nuclear Sciences, University of Belgrade
, PO Box 522, 11001 Belgrade, Serbia
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Branislav Vlahović;
Branislav Vlahović
a)
6
North Carolina Central University
, Durham, North Carolina 27707, USA
7
NASA University Research Center for Aerospace Device Research and Education and NSF Center of Research Excellence in Science and Technology, Computational Center for Fundamental and Applied Science and Education
, North Carolina 27707, USA
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Vladimir Djoković
Vladimir Djoković
a)
5
Vinča Institute of Nuclear Sciences, University of Belgrade
, PO Box 522, 11001 Belgrade, Serbia
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Tladi G. Mofokeng
1
Adriaan S. Luyt
1
Vera P. Pavlović
2
Vladimir B. Pavlović
3,4
Duško Dudić
1,5
Branislav Vlahović
6,7,a)
Vladimir Djoković
5,a)
1
Department of Chemistry, University of Free State
, Private Bag X13, Phuthaditjhaba 9866, South Africa
2
Faculty of Mechanical Engineering, University of Belgrade
, 11000 Belgrade, Serbia
3
Faculty of Agriculture, University of Belgrade
, 11000 Belgrade, Serbia
4
Institute of Technical Sciences, Serbian Academy of Sciences and Arts
, Belgrade, Serbia
5
Vinča Institute of Nuclear Sciences, University of Belgrade
, PO Box 522, 11001 Belgrade, Serbia
6
North Carolina Central University
, Durham, North Carolina 27707, USA
7
NASA University Research Center for Aerospace Device Research and Education and NSF Center of Research Excellence in Science and Technology, Computational Center for Fundamental and Applied Science and Education
, North Carolina 27707, USA
a)
Authors to whom correspondence should be addressed. Electronic addresses: [email protected] and [email protected]
J. Appl. Phys. 115, 084109 (2014)
Article history
Received:
November 18 2013
Accepted:
February 12 2014
Citation
Tladi G. Mofokeng, Adriaan S. Luyt, Vera P. Pavlović, Vladimir B. Pavlović, Duško Dudić, Branislav Vlahović, Vladimir Djoković; Ferroelectric nanocomposites of polyvinylidene fluoride/polymethyl methacrylate blend and BaTiO3 particles: Fabrication of β-crystal polymorph rich matrix through mechanical activation of the filler. J. Appl. Phys. 28 February 2014; 115 (8): 084109. https://doi.org/10.1063/1.4866694
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