Effect Of Thermal Annealing On The Optical Properties Of Thin Films Of Polymer Blend (PMMA:PVC:PS)

Sabbar, Ali N.

doi:10.18081/2226-3284/018-3/1-7

Cited by 1 publication

(4 citation statements)

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“…With an increase in temperature, the weak PVA peaks in the binary blend became more absorbent. Increases in the absorbance in polymer blend with increased temperatures agree with reference 18 .…”

Section: Resultssupporting

confidence: 87%

“…9 illustrates the absorption coefficient for a binary blend of PVA75%+PVC25%, PVA50%+PVC50%, and PVA25%+PVC75% at various temperatures. After applying temperatures, the binary blend's absorption coefficient rose, this is agreed with reference 18 . PVA, PVC, and binary mixed exhibit indirect electronic transitions both before and after applied temperatures.…”

Section: Figure5 Spectrum Of Absorption At Differentsupporting

confidence: 88%

“…5 depicts the spectrum of absorption of a binary mix with various concentrations PVA75%+PVC25%, PVA50%+PVC50%, and PVA25%+PVC75% after one hour at 120,140 °C.With an increase in temperature, the weak PVA peaks in the binary blend became more absorbent. Increases in the absorbance in polymer blend with increased temperatures agree with reference18 .…”

supporting

confidence: 87%

“…The addition of the dopant was shown to have an impact on optical parameters including the absorption coefficient, refraction index (n), and extinction coefficient (K). The effect of temperatures on the optical properties of (PMMA-PVC-PS) blend was studied by Ali N. Sabbar, Karar M. Talib and Hassan T. Badh, they obtained that the energy gap was reduced by applied temperatures 18 . In this work the effect of different temperatures 25, 120 and 140 °C for 1 hour on the optical characteristics of binary blend films of PVC and PVA at various concentrations PVA75% + PVC25%, PVA50% + PVC50%, and PVA25% + PVC75% were examined.…”

Section: Introductionmentioning

confidence: 99%

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Investigation the Effect of Thermal Agent on Physical Properties of PVC-PVA Blended

Neamah,

Mahdi,

Jasim

2024

Baghdad Sci.J

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In this study, the optical characteristics of polyvinyl chloride(PVC), polyvinyl alcohol (PVA) and binary PVA - PVC blend films at various concentrations PVA75% + PVC25%, PVA50% + PVC50%, and PVA25% + PVC 75% are examined in relation to temperature variations 25, 120 and 140 °C for 1 hour. The binary blend films of polyvinyl chloride and polyvinyl alcohol were produced using casting techniques. UV-visible spectroscopy used to determine the optical properties of the films in the wavelength range (200-900) nm, such as transmittance, absorbance, absorption coefficient and energy gap as well as the impact of temperature on these parameters, were measured and examined. The results of the experimental part demonstrated that the absorption and absorption coefficient of binary PVA - PVC blend films at various concentrations increased with increased concentration of polyvinyl alcohol (PVA) polymer. The energy gap of binary PVA-PVC blend films at various concentrations decreased with increased concentration of polyvinyl alcohol (PVA). The ratio of (PVA 75%+ PVC25%) binary blend has extremely suitable optical characteristics. The absorption and absorption coefficient of binary PVA-PVC blends increased with increased temperatures. While the transmission and energy gap of binary PVA-PVC blend films were decreased as the temperature was raised. The nature of electronic transitions of binary PVA - PVC blend films at various concentrations before and after exposure to temperatures is indirect. From the results obtained from the experimental part, it concludes that the absorption and absorption coefficient of binary PVA - PVC blend films are better than pure polyvinyl chloride and polyvinyl alcohol polymers. The optical characteristics of binary PVA - PVC blend films effect by exposure to temperatures.

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Section: Resultssupporting

confidence: 87%

Section: Figure5 Spectrum Of Absorption At Differentsupporting

confidence: 88%

supporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

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