Fabrication and characterization of cerium doped barium titanate/PMMA nanocomposites

Padalia, Diwakar; Bisht, Garima; Johri, U. C.; Asokan, K.

doi:10.1016/j.solidstatesciences.2013.02.002

Cited by 32 publications

(17 citation statements)

References 31 publications

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“…It can be seen that the incorporation of low contents of CeO 2 nanocrystals (0.5 and 1.0 wt %) thermally treated at different temperatures slightly increased the glass transition temperature up to~125˝C in comparison with pure PMMA~121˝C. In agreement with previous reports with other composites [33,48], the trend of the glass transition shifting to a slightly higher temperature is attributed to the electrostatic interactions between the PMMA matrix side chain and CeO 2 , which hinder the rotation of polymeric chains, leading to increased T g . Figure 13.…”

Section: Thermal Studiessupporting

confidence: 91%

“…The bending vibration bands of the methyl (-CH 3 ) group appeared at 1484 and 1436 cm´1 in the FTIR spectra, whereas the deformation mode of the methylene (-CH 2 -) group appeared at 1387 cm´1. In addition, the sharp and intense bands at 1728 and 753 cm´1 are attributed to the stretching and out-of-plane-bending vibrations of the carbonyl (C=O) group, respectively [33]. The PMMA/CeO 2 hybrid systems show absorption bands that matched well with pure PMMA, indicating a weak interaction between PMMA and CeO 2 nanoparticles.…”

Section: Ft-ir Analysismentioning

confidence: 96%

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Thermal, Mechanical and UV-Shielding Properties of Poly(Methyl Methacrylate)/Cerium Dioxide Hybrid Systems Obtained by Melt Compounding

et al. 2015

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Thick and homogeneous hybrid film systems based on poly(methyl methacrylate) (PMMA) and CeO2 nanoparticles were synthesized using the melt compounding method to improve thermal stability, mechanical and UV-shielding properties, as well as to propose them for use in the multifunctional materials industry. The effect of the inorganic phase on these properties was assessed by using two different weight percentages of synthesized CeO2 nanoparticles (0.5 and 1.0 wt %) with the sol–gel method and thermal treatment at different temperatures (120, 235, 400, 600 and 800 °C). Thereafter, the nanoceria powders were added to the polymer matrix by single screw extrusion. The absorption in the UV region was increased with the crystallite size of the CeO2 nanoparticles and the PMMA/CeO2 weight ratio. Due to the crystallinity of CeO2 nanoparticles, the thermal, mechanical and UV-shielding properties of the PMMA matrix were improved. The presence of CeO2 nanostructures exerts an influence on the mobility of PMMA chain segments, leading to a different glass transition temperature.

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Section: Thermal Studiessupporting

confidence: 91%

Section: Ft-ir Analysismentioning

confidence: 96%

Thermal, Mechanical and UV-Shielding Properties of Poly(Methyl Methacrylate)/Cerium Dioxide Hybrid Systems Obtained by Melt Compounding

et al. 2015

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“…Several dielectric composites have been proposed by using BaTiO 3 particles as filler and a thermoplastic [5][6][7][8][9][10][11] or thermosetting [12,18] polymer as matrix. Composites can be prepared in many different ways, leading to a large variety of morphologies, which strongly influence the macroscopic behavior [19].…”

Section: Introductionmentioning

confidence: 99%

Dielectric permittivity calculation of composites based on electrospun barium titanate fibers

Reboredo

Parra

Castro

2015

Mater. Res. Express

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On the basis of theoretical predictions and experimental results, an empirical method using upper bound equation of the rule of mixtures (ROM) is reported to predict the dielectric permittivity of barium titanate nanofibers. In addition, composites with low volume fraction of BaTiO 3 fiber layers embedded in epoxy resin were prepared and characterized. The relative permittivities of composites with perpendicular and parallel configurations, with respect to the electrodes, were calculated by means of the ROM model. The predicted permittivities matched precisely the obtained experimental values.

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“…Besides, it is crucial for the improvement of the dielectric constant of polymer-based composites in interfacial area between the polymer matrix and fillers. What is more, the dielectric permittivity of the ceramic additives is much higher than the resin matrix, and the dielectric permittivity of polymer-based composites is enhanced with the increment of the filler content which leads to an increment in the interfacial area of polymer matrix and fillers [73]. Especially, the relationship between dielectric permittivity and filler content is increasing linearly.…”

Section: High-k Pen Composites With Ceramic Fillersmentioning

confidence: 99%

Polyarylene Ether Nitrile-Based High-k Composites for Dielectric Applications

Zhan

Wang

et al. 2018

International Journal of Polymer Science

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Flexible polymer-based composites exhibiting high dielectric constant as well as low dielectric loss have been intensively investigated for their potential utilization in electronics and electricity industry and energy storage. Resulting from the polar -CN on the side chain, polyarylene ether nitrile (PEN) shows relatively high dielectric constant which has been extensively investigated as one of the hot spots as dielectric materials. However, the dielectric constant of PEN is still much lower than the ceramic dielectrics such as BaTiO 3 , TiO 2 , and Al 2 O 3 . In this review, recent and in-progress advancements in the designing and preparing strategies to obtain high-k PEN-based nanocomposites are summarized. According to the types of the added fillers, the effects of organic fillers, dielectric ceramic fillers, and conductive fillers on electric properties of PEN-based composites are investigated. In addition, other factors including the structures and sizes of the additive, the compatibility between the additive agent and the PEN, and the interface which affects the dielectric properties of the obtained composite materials are investigated. Finally, challenges facing in the design of more effective strategies for the high-k PEN-based dielectric materials are discussed.

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Fabrication and characterization of cerium doped barium titanate/PMMA nanocomposites

Cited by 32 publications

References 31 publications

Thermal, Mechanical and UV-Shielding Properties of Poly(Methyl Methacrylate)/Cerium Dioxide Hybrid Systems Obtained by Melt Compounding

Thermal, Mechanical and UV-Shielding Properties of Poly(Methyl Methacrylate)/Cerium Dioxide Hybrid Systems Obtained by Melt Compounding

Dielectric permittivity calculation of composites based on electrospun barium titanate fibers

Polyarylene Ether Nitrile-Based High-k Composites for Dielectric Applications

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