scholarly journals Excess Molar Quantities of Binary Mixture of Dipropyl amine with Aliphatic Alcohols at 298.15 K

2018 ◽  
Vol 34 (4) ◽  
pp. 2074-2082 ◽  
Author(s):  
Zainab A. H. Al-Dulaimy ◽  
Dhafir T. A. Al-Heetimi ◽  
Husam Saleem Khalaf ◽  
Ahmed Mohammed Abbas
Keyword(s):  
Free Energy ◽  
Refractive Index ◽  
Binary Mixture ◽  
Excess Molar Volumes ◽  
Standard Errors ◽  
Refractive Indices ◽  
Hydroxyl Groups ◽  
Molar Gibbs Free Energy ◽  
Viscosity Deviations ◽  
Refractive Index Deviations

Refractive indices (nD), viscosities (η) and densities (ρ) were deliberated for the binary mixtures created by dipropyl amine with 1-octanol, 1-heptanol, 1-hexanol, 1-pentanol and tert-pentyl alcohol at temperature 298.15 K over the perfect installation extent. The function of Redlich-Kister were used to calculate and renovated of the refractive index deviations (∆nD), viscosity deviations (ηE), excess molar Gibbs free energy (∆G*E) and excess molar volumes (VmE) The standard errors and coefficients were respected by this function. The values of ∆nD, ηE, VmE and ∆G*E were plotted against mole fraction of dipropyl amine. In all cases the obtained ηE, ∆G*E, VmE and ∆nD values were negative at 298.15K. Effect of carbon atoms number in the chain of alcohol and hydroxyl groups' position on molecular interactions in these mixtures has also been discussed.

scholarly journals Analysis of thermophysical properties of binary systems containing ethyl acetate and 1-propanol or 1-butanol

2020 ◽  
Vol 74 (3) ◽  
pp. 163-185
Author(s):  
Divna Majstorovic ◽  
Marija Mirkovic ◽  
Mirjana Kijevcanin ◽  
Emila Zivkovic
Keyword(s):  
Refractive Index ◽  
Ethyl Acetate ◽  
Binary Systems ◽  
Calculated Data ◽  
Excess Molar Volumes ◽  
Isentropic Compressibility ◽  
Experimental Measurements ◽  
Viscosity Deviations ◽  
Kister Equation ◽  
Refractive Index Deviations

The aim of this research is the experimental determination of density, viscosity, refractive index and speed of sound for binary mixtures of the ester ethyl acetate and alcohols. Experimental measurements were carried out for two systems with 1-propanol and 1-butanol at atmospheric pressure and in a temperature range 288.15 - 323.15 K. Results of experimental measurements were further used to determine excess molar volumes, viscosity deviations, refractive index deviations, and excess isentropic compressibility for each investigated mixture. These calculated data were correlated using the empirical Redlich-Kister equation. Positive values of the excess molar volume and isentropic compressibility appear for both analysed systems, while values of viscosity and refractive index deviations are negative. The structure and specific characteristics of different molecules in considered mixtures and determined non-ideal behaviour allow the insight into the possible type of interactions in the mixture, interstitial accommodation and structural effects.

scholarly journals Optical Nonlinear Refractive Index of Laser-Ablated Gold Nanoparticles Graphene Oxide Composite

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Amir Reza Sadrolhosseini ◽  
A. S. M. Noor ◽  
Nastaran Faraji ◽  
Alireza Kharazmi ◽  
Mohd. Adzir Mahdi
Keyword(s):  
Particle Size ◽  
Gold Nanoparticles ◽  
Refractive Index ◽  
Graphene Oxide ◽  
Gold Nanoparticle ◽  
Spherical Shape ◽  
Refractive Indices ◽  
Hydroxyl Groups ◽  
Uv Visible ◽  
Laser Ablation Technique

Gold nanoparticles were prepared in graphene oxide using laser ablation technique. The ablation times were varied from 10 to 40 minutes, and the particle size was decreased from 16.55 nm to 5.18 nm in spherical shape. The nanoparticles were capped with carboxyl and the hydroxyl groups were obtained from Fourier transform infrared spectroscopy. Furthermore, the UV-visible peak shifted with decreasing of nanoparticles size, appearing from 528 nm to 510 nm. The Z-scan technique was used to measure the nonlinear refractive indices of graphene oxide with different concentrations and a gold nanoparticle graphene oxide nanocomposite. Consequently, the optical nonlinear refractive indices of graphene oxide and gold nanoparticle graphene oxide nanocomposite were shifted from1.63×10-9 cm2/W to4.1×10-9 cm2/W and from1.85×10-9 cm2/W to5.8×10-9 cm2/W, respectively.

scholarly journals Vapor pressure, density, viscosity and refractive index of dimethyl sulfoxide + 1,4-dimethylbenzene system

2008 ◽  
Vol 73 (1) ◽  
pp. 73-85 ◽  
Author(s):  
Oana Ciocirlan ◽  
Olga Iulian
Keyword(s):  
Dimethyl Sulfoxide ◽  
Excess Molar Volumes ◽  
Excess Properties ◽  
Refractive Indices ◽  
Excess Functions ◽  
Liquid Equilibrium ◽  
Viscosity Deviations ◽  
Unifac Model ◽  
Equilibrium Data ◽  
Kister Equation

This paper reports the experimental results of isothermal vapor-liquid equilibrium data between 303.15 and 333.15 K, and densities, viscosities, refractive indices from 298.15 to 323.15 K of the dimethyl sulfoxide + 1,4-dime?thylbenzene system over the entire range of mixture composition. The obtained PTX data were correlated by the Wilson and NRTL models and estimated by the UNIFAC model. The excess Gibbs energy and activity coefficients were calculated and compared with others excess properties. Excess molar volumes, viscosity deviations and deviations in refractivity were calculated from the experimental data; all the computed quantities were fitted to the Redlich-Kister equation. The resulting excess functions were interpreted in terms of structure and interactions.

scholarly journals Refractive indices of ternary liquid mixtures containing aliphatic alcohols at several temperatures

2005 ◽  
Vol 59 (1-2) ◽  
pp. 1-8 ◽  
Author(s):  
Milan Sovilj ◽  
Branislava Barjaktarovic
Keyword(s):  
Refractive Index ◽  
Atmospheric Pressure ◽  
Liquid Mixtures ◽  
Ternary Mixtures ◽  
Refractive Indices ◽  
Empirical Correlations ◽  
Average Percentage ◽  
Mole Fraction Range ◽  
Best Fit ◽  
Refractive Index Deviations

The refractive indices of ternary liquid mixtures (2-propanol+2-butanol+ethanol) and (chloroform+2-propanol+2-butanol) were measured at 20, 25, 30, and 35?C, and atmospheric pressure. The results were used to calculate the refractive index deviations over the entire mole fraction range for the mixtures. The refractive index deviations for the ternary mixtures were further fitted to empirical correlations (Cibulka Nagata-Tamura, and Lopez et al) to estimate the ternary fitting parameters. Standard deviations and average percentage deviations from the regression lines are shown. The best fit was obtained by the Nagata-Tamura empirical correlation. Some of the existing predictive equations for the refractive index deviations (Tsao-Smith, K?hler, and Colinet) were tested.

scholarly journals Viscosities and refractive indices of binary systems acetone+1-propanol, acetone+1,2-propanediol and acetone+1,3-propanediol

2014 ◽  
Vol 20 (3) ◽  
pp. 441-455 ◽  
Author(s):  
Emila Zivkovic ◽  
Mirjana Kijevcanin ◽  
Ivona Radovic ◽  
Slobodan Serbanovic
Keyword(s):  
Experimental Data ◽  
Refractive Index ◽  
Binary Mixtures ◽  
Atmospheric Pressure ◽  
Binary Systems ◽  
Refractive Indices ◽  
Mixing Rules ◽  
Viscosity Deviations ◽  
Kister Equation

Viscosities and refractive indices of three binary systems, acetone+1-propanol, acetone+1,2-propanediol and acetone+1,3-propanediol, were measured at eight temperatures (288.15, 293.15, 298.15, 303.15, 308.15, 313.15, 318.15, 323.15)K and at atmospheric pressure. From these data viscosity deviations and deviations in refractive index were calculated and fitted to the Redlich-Kister equation. The viscosity modelling was done by two types of models: predictive UNIFAC-VISCO and ASOG VISCO and correlative Teja-Rice and McAlister equations. The refractive indices of binary mixtures were predicted by various mixing rules and compared with experimental data.

scholarly journals Estimation of Excess Properties of Binary Liquids Systems of Tetrahydrofurfuryl Alcohol with Short-Chain Carboxylic Acids at 298.15 K

2019 ◽  
Vol 31 (4) ◽  
pp. 820-824
Author(s):  
Husam S. Khalaf ◽  
Zainab A.H. Al-Dulaimy ◽  
Ahmed M. Abbas ◽  
Maida H. Saleem
Keyword(s):  
Carboxylic Acids ◽  
Excess Molar Volumes ◽  
Dipolar Interaction ◽  
Liquid Mixtures ◽  
Excess Properties ◽  
Molar Gibbs Free Energy ◽  
Viscosity Deviations ◽  
Liquid Systems ◽  
The Difference ◽  
Kister Equation

At the temperature 298.15 K, some physical properties such as: refractive indices (nD), viscosities (η) and densities (ρ) were studied in four liquid-liquid mixtures: carboxylic acids (HCOOH, CH3COOH, CH3CH2COOH and CH3CH2CH2COOH) with tetrahydrofurfuryl alcohol (THFA) with the identified configuration set. These empirical data were utilized to estimate the excess molar volumes (Vm E), refractive index perversions (ΔR), viscosity deviations (ηE) and excess molar Gibbs free energy (ΔG*E). Values of Vm E, ηE , ΔG*E and ΔR were plotted versus mole fraction of tetrahydrofurfuryl alcohol. In all cases, the values of Vm E, ηE , ΔG*E and ΔR that obtained in this study were found to be negative at 298.15 K. The excess parameters were applied in the Redlich-Kister equation by utilizing multi-parameter coefficients that concluded binary coefficients and in respect to the standard deviation. The difference of these characteristics with the formation of binary liquid systems indicates the absence of bipolar bond, variation in the shape and size of component molecules, hydrogen bonding and dipolar interaction among unlike molecules.

scholarly journals Densities, refractive indices and viscosities of the binary mixtures of dimethyl phthalate or dimethyl adipate with tetrahydrofuran

2014 ◽  
Vol 79 (1) ◽  
pp. 77-87 ◽  
Author(s):  
Andjela Knezevic-Stevanovic ◽  
Jelena Smiljanic ◽  
Slobodan Serbanovic ◽  
Ivona Radovic ◽  
Mirjana Kijevcanin
Keyword(s):  
Binary Mixtures ◽  
Atmospheric Pressure ◽  
Excess Molar Volumes ◽  
Refractive Indices ◽  
Dimethyl Phthalate ◽  
Molar Volumes ◽  
Viscosity Deviations ◽  
Dimethyl Adipate ◽  
Vibrating Tube Densimeter

Densities, refractive indices and viscosities of the binary mixtures of dimethyl phthalate (or dimethyl adipate) + tetrahydrofuran have been measured at eight temperatures (288.15 to 323.15 K) and atmospheric pressure. All measurements were performed using an Anton Paar DMA 5000 digital vibrating-tube densimeter, Anton Paar RXA 156 refractometer and Anton Paar SVM 3000/G2 digital Stabinger viscometer, respectively. From the experimental densities, refractive indices and viscosities, the excess molar volumes, VE, deviations of refractive indices, DnD, and viscosity deviations, Dh, were calculated.

scholarly journals Study of Intermolecular Interactions of Binary Mixture of sec- and tert-Amines with Alkanols (C1-C3): Refractive Indices

2020 ◽  
Vol 32 (10) ◽  
pp. 2443-2449
Author(s):  
Payal Bhagat ◽  
Sanjeev Maken
Keyword(s):  
Refractive Index ◽  
Binary Mixture ◽  
Chain Length ◽  
Binary Mixtures ◽  
Intermolecular Interactions ◽  
Steric Hindrance ◽  
Refractive Indices ◽  
Mixing Rules ◽  
Isopropyl Group

In this work, the refractive indices (nD) of binary mixture of diisopropylamine (DIPA) and tributylamine (TBA) (as sec- and tert-amines) with alkanol (methanol, ethanol, 1-propanol, 2-propanol) were measured from 298.15 K to 318.15 K. The sec- and tert-amines were selected to study the effect of branching at N-atom of amine on intermolecular interactions with alkanols having different chain length. It was found that the TBA interacts strongly with alkanol in comparison to DIPA due to steric hindrance offered by isopropyl group at N-atom. Various mixing rules were applied to evaluate the refractive index compared well with the experimental refractive indices data for the present binary mixtures. The experimental refractive indices was also fitted to Redlich-Kister polynomial.

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