Spectroscopic investigations and electrical properties of PVA/PVP blend filled with different concentrations of nickel chloride

Ragab, H.M.

doi:10.1016/j.physb.2010.11.030

Cited by 85 publications

(30 citation statements)

References 28 publications

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“…The appearance of a band at 1658 cm -1 (C = C) confirms the semi-crystalline nature of the blends as reported by Ragab 6 . A weak peak around 1658 cm -1 is observed in the present work, which confirms the semicrystalline nature polymer blend films.…”

Section: Fourier Transform Infra-red Spectroscopy (Ftir)supporting

confidence: 88%

“…The third degradation between 387 -479ºC corresponds to the decomposition of PVA main backbone chain. The DTG curve of the pure MAA:EA copolymers shown in inset of Figure (6), reveals that there are three distinct steps of weight loss. The 4 -5% weight loss below 170ºC is attributed to the loss of adsorbed water 23 .…”

Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

“…Due to the importance in the field of polymer applications, special emphasis has been given to those blends in which the polymeric components are believed to be mixed at the molecular level mixtures 3 . Recently, some of the polymer blend electrolytes such as ( PVA -PANI ) 4 , ( PVA -PAN ), (PVP -PVA) 5,6 , (PMVEMA -PVA) , (PVA -PEI), (PVA -PVdF), (PEO -PVA) 7 , (PVA -PAA) 8 , (PVA -PEG) 9 , (PEO -PMMA) 10 , (PVC -PS), (Chitosan -PVA) 2 , (PVA -NyC), (PEMA -PVdF), (PVA -NaAlg) etc. have been studied extensively by various techniques.…”

Section: Introductionmentioning

confidence: 99%

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Structural, Optical and Thermal Characterizations of PVA/MAA:EA Polyblend Films

et al. 2018

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Films of polyvinyl alcohol (PVA), Methacrylic Acid -Ethyl Acrylate (MAA:EA) copolymer and their blends PVA:MAA:EA of composition 80:20, 60:40, 50:50, 40:60, 20:80 (wt %) were prepared by using the solution cast technique. The prepared films were investigated by structural, optical and thermal studies. X-ray diffraction (XRD) scans revealed the semicrystalline nature of the blends for lower concentrations of PVA up to 60 wt % and the amorphous nature for higher ones. Fourier transform infra-red spectroscopy (FTIR) of blend samples indicates that there is a compatibility between PVA and MAA:EA copolymers through the formation of hydrogen-bonding between their polar groups. SEM image of polymer blend suggested the presence structural reorganization of polymer chains. UV-Visible spectral analysis revealed that the intensity of the shoulder around 271 nm decreases with increasing MAA:EA content. In DSC analysis, a single glass transition temperature for each blend was observed, which supports the existence of compatibility of such systems. From the observed results, 50:50 (wt %) PVA/MAA:EA is found to be the optimum blending ratio.

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Section: Fourier Transform Infra-red Spectroscopy (Ftir)supporting

confidence: 88%

Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Structural, Optical and Thermal Characterizations of PVA/MAA:EA Polyblend Films

et al. 2018

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“…The band at about 1,096 cm -1 corresponds to C-O stretching of acetyl groups present on PVA backbone. Vibrational band at about 1,647 cm -1 corresponds to C=O stretching of PVA and PVP [21]. Figure 5(b) for pure PVP shows a small absorption band at about 1,539 cm -1 that is assigned to characteristic vibration of C=N (pyridine ring).…”

Section: Resultsmentioning

confidence: 96%

Spectroscopic and dielectric study of iodine chloride doped PVA/PVP blend

Abdelrazek

Ragab

2014

Indian J Phys

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Optical and dielectric properties of Poly (vinyl alcohol)/ Poly (vinyl pyrrolidone) blend and blend loaded with different concentrations of ICl 2 were studied. UV-Vis spectral analysis before and after c-irradiation suggested that the addition of iodine led to complete complexation between ICl 2 and polymer blend were observed. The values of optical parameters k o , S o and n ? were determined from by reflection and transmission spectra in the range of 200-800 nm. The refractive index was found to change non-monotonically with the increase of iodine. Infrared analysis revealed the formation of new species between blend and iodine content. There were some changes in IR absorption bands, position and their intensities. The AC conductivity (r ac ) behavior of all prepared films was investigated in the frequency range 42 Hz-5 MHz and under different isothermal stabilization in the temperature range 300-400 K. The dependence of the imaginary modulus (M 00 ) on frequency at lower frequencies was estimated. The increasing values of M 00 may be attributed to the bulk effect with the increase in temperature.

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“…3b) showed an absorption peak at 1647 cm À1 which was attributed to the C@O groups attached to the pyrrole ring [41]. The CAN stretching vibrations were seen at 1572 cm À1 [42,43]. The characteristic absorption peak at 1465 cm À1 in PVP molecules was due to CAH bending vibrations [44,45].…”

Section: Ftir Spectroscopymentioning

confidence: 97%