Ultrasonic Studies of Molecular Interactions in Polymer Solution of the Polyisobutylene (PIB) and Benzene

Upmanyu, Arun; Singh, Devinder P.

doi:10.3813/aaa.918723

Cited by 12 publications

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“…The USW velocity has been directly proportion with ZrO 2 NPs added, but inversely proportional with frequency, because USW causes various physical interaction between PEO/PMMA/PVP and ZrO 2 NPs molecules, lead to increase the velocity, but the increasing of frequencies led to decrease the velocities [12]. Figures (6 and 7) show that, the relaxation time and relaxation amplitude also decrease against the frequencies according to theoretical equation [13]:…”

Section: Resultsmentioning

confidence: 90%

Synthesis, Characterization and USW Sensor of PEO/PMMA/PVP Doped with Zirconium Dioxide Nanoparticles

Obaid¹

2021

Preprint

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Piezoelectric phenomena is very important for various applications such as ultrasound waves (USW) sensor and pressure sensors. The raw materials from polyethylene oxide (PEO), Poly(methyl methacrylate)(PMMA) and poly(N-vinyl pyrrolidone) (PVP) polymer blends were doped with 0.02,0.04 and 0.06 wt% from zirconium dioxide (ZrO2) nanoparticles (NPs) as a nanocomposites (NCs). The resultant films were prepared by dry casting method. The optical microscope (OM) and scanning electron microscopy (SEM) were used to satisfied from the SiO2NPs diffusion in the blend. The SiO2NPs were good diffused inside the blend with some weak aggregation happened in the high content of NPs. The composite films were diagnosed by FTIR. The USW properties were measured for k1 spaceman with various frequencies (25,30,…,45) MHz. The USW coefficients were clearly effected by the frequency varied. The resulted composite film was succeeded to be used as USW sensor, also these findings could help to realize these new NCs as promising materials for wide applications, such as backlight, car glass and UV filters.

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Section: Resultsmentioning

confidence: 90%

Synthesis, Characterization and USW Sensor of PEO/PMMA/PVP Doped with Zirconium Dioxide Nanoparticles

Obaid¹

2021

Preprint

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“…The reduced volume Ṽ in terms of the coefficient of thermal expansion (α) can be computed using the relation given below: Ṽ = ( α T 3 false( 1 + α T false) + 1 ) 3 where α can be calculated in terms of ultrasonic velocity ( U ) and density ( d ) at various temperatures and concentrations using a well-known relation available in the literature: α = 75.6 × 10 − 6 T 1 / 9 U 1 / 2 d 1 / 3 P * can be evaluated from the knowledge of α and K T : P * = γ P T̃ Ṽ 2 = true( ∂ P ∂ T true) V T̃ Ṽ 2 = ( α K T ) T̃ Ṽ 2 where γ P is the thermal pressure coefficient at the zero pressure limit and K T is the isothermal compressibility. K T was determined using a formula taken from the literature. , The above relations have been employed to compute P *, V *, and T* for mixture components. Thereafter, these parameters were used to determine the segment fractions (ψ), site fraction (θ), and interaction parameter (χ 12 ) for the binary mixtures.…”

Section: Theoretical Formulationmentioning

confidence: 99%

“…K T was determined using a formula taken from the literature. 40 , 41 The above relations have been employed to compute P *, V *, and T* for mixture components. Thereafter, these parameters were used to determine the segment fractions (ψ), site fraction (θ), and interaction parameter (χ 12 ) for the binary mixtures.…”

Section: Theoretical Formulationmentioning

confidence: 99%

Estimation of Ultrasonic Velocity, Density, Internal Pressure, and Thermophysical Parameters of Ionic Liquid Mixtures: Application of Flory’s Statistical Theory

Sirohi,

Upmanyu,

Kumar

et al. 2024

ACS Omega

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Flory's statistical theory (FST) has been employed to estimate the ultrasonic velocity, density, internal pressure, and several important thermophysical parameters such as the energy of vaporization, the heat of vaporization, cohesive energy density, polarity index, and solubility for eight binary mixtures of ionic liquids and water within the temperature range of 288.15 to 308.15 K. The ionic liquids chosen for this investigation areThe predicted values of ultrasonic velocity and density show good agreement with the data reported in the literature. It endorses the applicability of FST to these binary mixtures. A comparative analysis of the internal pressure values (P i ) determined by using FST and the standard thermodynamic approach is also presented. The results obtained for P i using both approaches show good agreement. Besides, for the mixtures under study, the correlation between ultrasonic velocity, density, and surface tension has also been examined. The variation of thermophysical parameters with concentration and temperature changes has been utilized to explore the nature and strength of the solute−solvent interactions prevalent in these mixtures. It is pointed out that A−A-type interactions dominate over A-B-type interactions in water-rich regions of the mixtures.

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Synthesis, characterization and USW sensor of PEO/PMMA/PVP doped with zirconium dioxide nanoparticles

Abdali

2022

Trans. Electr. Electron. Mater.

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Ultrasonic Studies of Molecular Interactions in Polymer Solution of the Polyisobutylene (PIB) and Benzene

Cited by 12 publications

References 0 publications

Synthesis, Characterization and USW Sensor of PEO/PMMA/PVP Doped with Zirconium Dioxide Nanoparticles

Synthesis, Characterization and USW Sensor of PEO/PMMA/PVP Doped with Zirconium Dioxide Nanoparticles

Estimation of Ultrasonic Velocity, Density, Internal Pressure, and Thermophysical Parameters of Ionic Liquid Mixtures: Application of Flory’s Statistical Theory

Synthesis, characterization and USW sensor of PEO/PMMA/PVP doped with zirconium dioxide nanoparticles

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