Ferroelectric nanocomposites of polyvinylidene fluoride/polymethyl methacrylate blend and BaTiO3 particles: Fabrication of beta-crystal polymorph rich matrix through mechanical activation of the filler
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Аутори
Mofokeng, Tladi G.Luyt, Adriaan S.
Pavlović, Vera P.
Pavlović, Vladimir B.
Dudić, Duško
Vlahović, Branislav
Đoković, Vladimir
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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 beta-phase of PVDF, while the initial micron size particles induce the formation of the most common but non-polar alpha-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 dynam...ic mechanical analysis; the stiffness of the composite was higher when mechanically activated particles were used. (C) 2014 AIP Publishing LLC.
Извор:
Journal of Applied Physics, 2014, 115, 8Финансирање / пројекти:
- Материјали редуковане димензионалности за ефикасну апсорпцију светлости и конверзију енергије (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45020)
- Утицај величине, облика и структуре наночестица на њихова својства и својства нанокомпозита (RS-MESTD-Basic Research (BR or ON)-172056)
- Усмерена синтеза, структура и својства мултифункционалних материјала (RS-MESTD-Basic Research (BR or ON)-172057)
- project NSF CREST [HRD-0833184], project NASA [NNX09AV07A], National Research Foundation in South Africa
DOI: 10.1063/1.4866694
ISSN: 0021-8979; 1089-7550
WoS: 000332619600066
Scopus: 2-s2.0-84896795393
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Институција/група
VinčaTY - JOUR AU - Mofokeng, Tladi G. AU - Luyt, Adriaan S. AU - Pavlović, Vera P. AU - Pavlović, Vladimir B. AU - Dudić, Duško AU - Vlahović, Branislav AU - Đoković, Vladimir PY - 2014 UR - https://vinar.vin.bg.ac.rs/handle/123456789/5919 AB - 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 beta-phase of PVDF, while the initial micron size particles induce the formation of the most common but non-polar alpha-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. (C) 2014 AIP Publishing LLC. T2 - Journal of Applied Physics T1 - Ferroelectric nanocomposites of polyvinylidene fluoride/polymethyl methacrylate blend and BaTiO3 particles: Fabrication of beta-crystal polymorph rich matrix through mechanical activation of the filler VL - 115 IS - 8 DO - 10.1063/1.4866694 ER -
@article{ author = "Mofokeng, Tladi G. and Luyt, Adriaan S. and Pavlović, Vera P. and Pavlović, Vladimir B. and Dudić, Duško and Vlahović, Branislav and Đoković, Vladimir", year = "2014", abstract = "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 beta-phase of PVDF, while the initial micron size particles induce the formation of the most common but non-polar alpha-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. (C) 2014 AIP Publishing LLC.", journal = "Journal of Applied Physics", title = "Ferroelectric nanocomposites of polyvinylidene fluoride/polymethyl methacrylate blend and BaTiO3 particles: Fabrication of beta-crystal polymorph rich matrix through mechanical activation of the filler", volume = "115", number = "8", doi = "10.1063/1.4866694" }
Mofokeng, T. G., Luyt, A. S., Pavlović, V. P., Pavlović, V. B., Dudić, D., Vlahović, B.,& Đoković, V.. (2014). Ferroelectric nanocomposites of polyvinylidene fluoride/polymethyl methacrylate blend and BaTiO3 particles: Fabrication of beta-crystal polymorph rich matrix through mechanical activation of the filler. in Journal of Applied Physics, 115(8). https://doi.org/10.1063/1.4866694
Mofokeng TG, Luyt AS, Pavlović VP, Pavlović VB, Dudić D, Vlahović B, Đoković V. Ferroelectric nanocomposites of polyvinylidene fluoride/polymethyl methacrylate blend and BaTiO3 particles: Fabrication of beta-crystal polymorph rich matrix through mechanical activation of the filler. in Journal of Applied Physics. 2014;115(8). doi:10.1063/1.4866694 .
Mofokeng, Tladi G., Luyt, Adriaan S., Pavlović, Vera P., Pavlović, Vladimir B., Dudić, Duško, Vlahović, Branislav, Đoković, Vladimir, "Ferroelectric nanocomposites of polyvinylidene fluoride/polymethyl methacrylate blend and BaTiO3 particles: Fabrication of beta-crystal polymorph rich matrix through mechanical activation of the filler" in Journal of Applied Physics, 115, no. 8 (2014), https://doi.org/10.1063/1.4866694 . .