Dielectric spectroscopy studies on (PVP+PVA) polyblend film

Reddy, Ch. Venkata; Xia, Han; Zhu, Quanyao; Mai, Liqiang; Chen, Wen

doi:10.1016/j.mee.2005.08.010

Cited by 176 publications

(35 citation statements)

References 15 publications

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“…The outcomes of various studies on these materials have established that the dispersion of MMT in the PVA, PVP, PEO, and PEG matrices improves their mechanical, thermal, gas permeable and dielectric/electrical properties. The research work on the PVA blends with PVP, PEO, and PEG also confirms the enhancement in their technological and industrial important physicochemical properties as compared with the individual polymer. These improved properties of the polymers blends depend on the miscibility and the heteromolecular interaction compatibility generated between the functional groups of the polymers.…”

Section: Introductionsupporting

confidence: 58%

Structural characterization of hydrophilic polymer blends/montmorillonite clay nanocomposites

Sengwa

Choudhary

2014

J of Applied Polymer Sci

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The nanocomposite films comprising polymer blends of poly(vinyl alcohol) (PVA), poly(vinyl pyrrolidone) (PVP), poly(ethylene oxide) (PEO), and poly(ethylene glycol) (PEG) with montmorillonite (MMT) clay as nanofiller were prepared by aqueous solution casting method. The X‐ray diffraction studies of the PVA–x wt % MMT, (PVA–PVP)–x wt % MMT, (PVA–PEO)–x wt % MMT and (PVA–PEG)–x wt % MMT nanocomposites containing MMT concentrations x = 1, 2, 3, 5 and 10 wt % of the polymer weight were carried out in the angular range (2θ) of 3.8–30°. The values of MMT basal spacing d001, expansion of clay gallery width Wcg, d‐spacing of polymer spherulite, crystallite size L and diffraction peak intensity I were determined for these nanocomposites. The values of structural parameters reveal that the linear chain PEO and PEG in the PVA blend based nanocomposites promote the amount of MMT intercalated structures, and these structures are found relatively higher for the (PVA–PEO)–x wt % MMT nanocomposites. It is observed that the presence of bulky ester‐side group in PVP backbone restricts its intercalation, whereas the adsorption behavior of PVP on the MMT nanosheets mainly results the MMT exfoliated structures in the (PVA–PVP)–x wt % MMT nanocomposites. The crystallinities of the PEO and PEG were found low due to their blending with PVA, which further decreased anomalously with the increase of MMT concentration in the nanocomposites. The decrease of polymer crystalline phase of these materials confirmed their suitability in preparation of novel solid polymer nanocomposite electrolytes. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40617.

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Section: Introductionsupporting

confidence: 58%

Structural characterization of hydrophilic polymer blends/montmorillonite clay nanocomposites

Sengwa

Choudhary

2014

J of Applied Polymer Sci

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“…PVP has good electrical properties (moderate electrical conductivity and rich physics in charge transport mechanism) [98,106,111,122,127,128] , which made it suitable in various uses in electrical and optical applications, like screens, printed circuit boards [124,126,140] , cathode ray tubes, energy storage devices [123,138] , solar cells, and many others. It is reported that PVP can be used as photoresist in the "black matrix process," where it contributes to a better picture contrast and image resolution in color screen tubes.…”

Section: Optical and Electrical Applicationsmentioning

confidence: 99%

Poly(vinylpyrrolidone) – A Versatile Polymer for Biomedical and Beyond Medical Applications

Teodorescu¹,

Bercea²

2015

Polymer-Plastics Technology and Engineering

383

222

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The high versatility of poly(vinylpyrrolidone) (PVP) can be explained by its diverse properties including its solubility in water and in a broad range of liquid media, high chemical and thermal resistance, and unique wetting, binding, and film-forming properties. Thanks to biocompatibility, absence of toxicity and high capacity to form interpolymer complexes, PVP is widely used for designing materials for different applications, such as biomaterials for medical and nonmedical uses. This review summarizes a vast diversity of applicative examples showing the tremendous opportunities for future research and developments of PVP based biomaterials.

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“…Organic insulating polymers blends consisting PANI has been fabricated with noticeable advancement in mechanical and electrical properties, getting enormous observance from academics and industries. The electrical properties of films and pellets of PVA/PANI and PVA/PVP, respectively, have shown upgraded electrical properties of the composites like conductivity, dielectric, etc. A high throughput transaction is extended to fabricate nonwoven, breathable, and lightweight materials consisting of fine/uniform fibers making porous texture and extremely large ratio of surface area to volume .…”

Section: Introductionmentioning

confidence: 99%

Investigation of dielectric properties of free standing electrospun nonwoven mat

Tahalyani

Datar

Kandasubramanian

2017

J of Applied Polymer Sci

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Flexible materials with balanced dielectric as well as conductive characteristics have elucidated considerable demand in field of research where conventional dielectric or insulators can be replaced by recent advances in various electronics appliances. Our work describes the detailed analyses of dielectric properties like dielectric constant, losses, and electric modulus by means of broadband dielectric spectroscopy over frequency ranging from 0.1 Hz to 10 MHz and temperature ranging from 0 to 60 8C for poly(vinyl alcohol)-polyaniline (PVA-PANI) free standing electrospinning nonwoven mat. It has been contemplated that the dielectric constant was enhanced by increasing PANI concentration for complete range of frequency at room temperature. The enhanced dielectric constant value (5.14 at 0.1 Hz, 2.66 at 1 KHz, 2.58 at 10 KHz, and 2.19 at 10 MHz) was anticipated for 7 wt % loading of PANI which was attributed to the presence of dipoles and interfacial polarization enclosed by the polymers. The increased dielectric constant with PANI dosing as well as with temperature attributed to favorable interfacial polarization. Shifting of peak is noticed in the spectra of imaginary electric modulus with increase in temperature which indicates increased chain dynamics of polymers in the mat. Three-dimensional analysis of the field emission scanning electron microscopy images was carried out by SPIP analytical software.

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Dielectric spectroscopy studies on (PVP+PVA) polyblend film

Cited by 176 publications

References 15 publications

Structural characterization of hydrophilic polymer blends/montmorillonite clay nanocomposites

Structural characterization of hydrophilic polymer blends/montmorillonite clay nanocomposites

Poly(vinylpyrrolidone) – A Versatile Polymer for Biomedical and Beyond Medical Applications

Investigation of dielectric properties of free standing electrospun nonwoven mat

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