PVA/K2Ti6O13 synthetic composite for dielectric applications
24 May 2016-Vol. 1731, Iss: 1, pp 140002
TL;DR: In this article, the authors demonstrated the preparation of polyvinyl alcohol (PVA) /Potassium titanate (K2Ti6O13) synthetic composite by solution blending.
Abstract: We demonstrated the preparation of polyvinyl alcohol (PVA) /Potassium titanate (K2Ti6O13) synthetic composite by solution blending. The loading of K2Ti6O13 well dispersed in PVA and improved electrical performance. The dielectric constant and loss as a function of temperature were recorded under frequency (200Hz-1 kHz). The real dielectric constant value obtained is (e=1000) feasible for various electronic and non-conventional energy applications.
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TL;DR: In this paper, the alteration of surface morphology due to plasma treatment was analyzed using polarizing optical, scanning electron and atomic force microscopic techniques, which demonstrated the synergic effect induced by plasma treatment which improved the surface energy and formation of micro texture.
16 citations
TL;DR: In this paper, the authors demonstrated the preparation of polyvinyl alcohol (PVA)/Copper bismuth sulphide (CuBi2S3) metal precursor composites by solution blending.
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TL;DR: In this paper, two different molecular weights of polyvinyl alcohol (PVA) films were used for impedance analysis, and the results showed higher magnitude of dielectric constant for low-molecular weight (LMW) of PVA film in comparison to higher molecular weight (HMW), which is based on Maxwell-Wagner (M-W) theory.
Abstract: Impedance analysis is the best technique to reveal the microstructural details of the polymeric material. The dielectric polarization not only depends on physical and chemical properties, but also on the degree of polymerization (DP) of the polymeric material. In the present study, to understand the polarizing mechanism, two different molecular weights of polyvinyl alcohol (PVA) films were used for impedance analysis. Dielectric polarization of PVA film measured at normal temperature and pressure (NTP) condition by using LCR-4282A Impedance analyzer, within the frequency range 20 Hz to 1 MHz. The importance of investigation is to know the simultaneous application of DC bias potential from 0 to 40 V with AC signal for measurement of over all electrical parameters. The result shows higher magnitude of dielectric constant for low-molecular weight (LMW) of PVA film in comparison to higher molecular weight (HMW), which is based on Maxwell-Wagner (M–W) theory. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 1014–1016, 2006
31 citations
TL;DR: In this article, a poly vinyl chloride (PVC)/poly-methyl methacrylate (PMMA) blend with loading of Nickel oxide (NiO) by solution cast technique is presented.
Abstract: We have prepared poly vinyl chloride (PVC)/poly-methyl methacrylate (PMMA) blend with loading of Nickel oxide (NiO) by solution cast technique. X-ray diffraction reveals the interaction between NiO, PVC and PMMA in the blend form. The weak interaction between PVC, PMMA and NiO was confirmed by Fourier transform infrared spectroscopy. The miscibility of PVC and PMMA has been confirmed by differential scanning calorimetry. The results demonstrate that the 2 wt% NiO loaded PVC/PMMA blend exhibits lowest crystallinity which leads to better NiO dispersion, also observed by atomic force microscopy and scanning electron microscopy. The performance of electrical properties were evaluated under wide band of frequency (10–107 Hz) as a function of DC bias voltage (0–25 V). The dielectric property was characterized via electrical modulus formalism. The present blend systems show good dielectric property as well as considerable conductivity which differs by frequency and DC bias. The variation of AC conductivity as a function of frequency and DC bias shows plateau shape at higher frequency which obeys Jonscher’s power law. It demonstrates that the AC electrical conductivity is directly proportional to the applied DC bias potential. It may be developed for electrolyte application.
25 citations
TL;DR: In this paper, composite films of polyvinyl alcohol (PVA) mixed with lead titante Oxide (PbTiO 3 ) were prepared and DC bias induced electrical parameters were disclosed with respect to pure PVA film.
24 citations
TL;DR: In this paper, a modified binary polymer blend made up of polycarbonate and polystyrene blend has been prepared by loading of aluminum oxide (Al2O3) as a dopant.
Abstract: In this study, a modified binary polymer blend made up of polycarbonate and polystyrene blend has been prepared by loading of aluminum oxide (Al2O3) as a dopant. The role of alumina with polymer blend system was addressed in view of interfacing criteria. The filler concentration of modified blend was taken as 5, 10, and 15%. The morphological, thermal, and electrical properties were characterized by various techniques. Optical microscopy confirms the homogenous dispersion of Al2O3 in blend. The presence of alumina was detected by subatomic level using atomic force microscope (both two and three dimensional approach). The differential scanning calorimetric thermographs demonstrate decreasing softing point as function of alumina loading. The dielectric properties such as dielectric constant, loss, and electrical modulus were studied under DC bias. The effect of DC bias exhibits significant changes at low amount of Al2O3. The dielectric polarization supports Maxwell Wagner (MW) theory due to low frequency re...
22 citations
TL;DR: In this article, a two-polymer system with polyvinyl alcohol (PVA) and polymethyl methacrylate (PMMA) polymer hydrogel was prepared by using boric acid as a cross-linking agent and the semicrystalline phase of composite gel was detected by X-ray diffraction tool.
Abstract: Polyvinyl alcohol (PVA) composed with polymethyl methacrylate (PMMA) polymer hydrogel was prepared by using boric acid as a cross-linking agent The semicrystalline phase of composite gel was detected by X-ray diffraction tool The occupied polymer PMMA morphology exhibits cross-linked alignment shown by scanning electron microscopy (SEM) The two-polymer system demonstrates an excellent dielectric property (with values, e = 590 for composite gel versus 400 compare to virgin PVA) The nonfluid media exhibit the impulse DC bias polarization The basic principle of this work is to understand and control the electrical parameters under external stimuli (field) response by Impedance tool In the biomedical field, this gel may be an excellent supporting media for sonographic as one of the best polar medium
18 citations