Physicochemical investigations of polyethylene glycols with N, N dimethylacetamide

Verma, Vikash; Awasthi, Aashees

doi:10.1016/j.jct.2019.105948

Cited by 21 publications

(7 citation statements)

References 43 publications

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“…At a constant temperature, Table 4 shows the increasing 𝛥𝑉 𝜙 0 values for each glycol (PG and HG), together with the different sorbic acid concentrations. Hydrogen bonds are formed between the -OH group of sorbic acid and the hydrophilic glycol groups, according to study findings [47][48][49].…”

Section: Partial Molar Volume Of Transfermentioning

confidence: 96%

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Thermo-acoustical analysis of sorbic acid:(food preservative) in an aqueous solution containing propylene glycol:(PG) and hexylene glycol:(HG) by using an ultrasonic technique

Firdaus,

Chakraborty,

Juglan

2024

Preprint

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Within a temperature range of [(293.15 K) to (308.15 K)] and a pressure range of 0.1 MPa, this study analyses molecular interactions in a sorbic acid solution in water. [Sorbic acid + (propylene glycol (PG) / hexylene glycol (HG)) + water] are present in the solution at quantities of [(0.01, 0.03, 0.05) \(mol.{kg}^{-1}\)]. We use the apparatus (Anton Paar DSA 5000 M) to find the density and the speed of sound. From the data we have, we may deduce many thermo-acoustic characteristics. Among the parameters that were experimentally measured were expansibilities, thermal expansion coefficients, volumes of transfer, and partial molar volumes. An effect of sound velocity on apparent molar isentropic compression, partial molar isentropic compression, and partial partial molar isentropic compression were all three forms of transfer pressure. Pair and triplet coefficients, as well as empirical constants, have been discovered to quantify important solute-solvent interactions. ''Propylene glycol has fewer interactions with the solvent than hexylene glycol, according to their characteristics”.

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Section: Partial Molar Volume Of Transfermentioning

confidence: 96%

“…Sound velocity is increased by high molality because it promotes solution interactions and structural alterations. [35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50]…”

Section: Ultrasonic Propertiesmentioning

confidence: 99%

Thermo-acoustical analysis of sorbic acid:(food preservative) in an aqueous solution containing propylene glycol:(PG) and hexylene glycol:(HG) by using an ultrasonic technique

Firdaus,

Chakraborty,

Juglan

2024

Preprint

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“…The evaluation of thermodynamic properties showed that the extent of interaction intensified with respect to the concentration of glycerol solution as well as with the molecular mass of PEGs. The densities and ultrasonic speeds for the binary mixture of PEG 200 and PEG 400 with N,N-dimethylacetamide (DMA) were measured over the entire mole fraction range and at temperatures 303.15 K, 313.15 K and 323.15 K [14]. The excess molar volume, excess ultrasonic speed and other characteristics were calculated.…”

Section: Introductionmentioning

confidence: 99%

“…The excess molar volume, excess ultrasonic speed and other characteristics were calculated. It was shown that strong hydrogen bonding occurs between DMA and PEG molecules; the molecular interactions are stronger in the case of DMA and PEG 400 [14]. In the study conducted by Chaudhary N. et Nain A. K. [15], the excess parameters were evaluated from the experimentally measured data of density, speed of sound and refractive index for the binary mixtures of PEG 400 with benzyl methacrylate over entire mole fraction range at the temperatures from 293.15 K to 318.15 K; the observed excess functions were used to discuss the intermolecular interactions between the components.…”

Section: Introductionmentioning

confidence: 99%

Influence of physicochemical properties and structure of mixed solvents propylene glycol – macrogol 400 on their in vitro release

Bezuglaya

Krasnopyorova

Liapunova

et al. 2023

SR: PS

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Aim. To study the density and dynamic viscosity of the mixed solvents propylene glycol (PG) – macrogol 400 (M400), to calculate their excess values and excess activation parameters of viscous flow, to evaluate the features of the structure of the mixed solvents and its influence on the in vitro release of PG and M400. Materials and methods. The mixed solvents PG - M400 were studied over the entire concentration range at temperatures from 293.15 to 313.15 K. The density and dynamic viscosity were determined, and the excess density, excess dynamic viscosity, activation parameters of viscous flow, and excess activation parameters of viscous flow were calculated. The in vitro release of PG and M400 from the mixed solvents was studied using vertical diffusion cells. The content of PG and M400 in the receptor medium was determined by gas chromatography using validated analytical procedures. The release rate, cumulative content, percentage of released PG or M400, coefficients of correlation and coefficients of determination were calculated. Results. The isotherms of excess density and excess dynamic viscosity of the mixed solvents PG-M400 pass through a maximum. The enthalpy makes the main contribution to the free activation energy of the viscous flow. The excess free energy is positive and has small values; the values of the excess entropy and excess enthalpy are negative, and the isotherms have the minimum at PG concentrations of 70‑75mol %. The release parameters of M400 are greater in binary mixtures where the M400 structure predominates. At PG content of ~75 mol %, the release parameters for PG and M400 are identical. With the increase in PG content above 75 mol %, when the PG structure predominates in the system, the release parameters of PG increase dramatically, and the release parameters of M400 decrease sharply. Conclusions. The structure of the binary system PG – M400 depends on its composition. Based on the isotherms of excess activation of viscous flow, it is possible to differentiate the areas where the structure of PG or the structure of M400 dominates, or the mixed structure of the binary solvent prevails. The in vitro release parameters for PG and M400 depend on the structure of the mixed solvents. The greatest difference in the release parameters of PG and M400 was observed in the area where the structure of PG dominates

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“…In addition, PEG is considered as a green solvent that is natural, cost-effective, safe, recyclable, biodegradable, nonflammable, simple, environmentally friendly, and abundantly available . Among several others, some representative papers published in recent years reported the density data of mixtures containing oligomeric poly(ethylene glycols) (PEGs) with organic solvents or other oligomeric materials. − Most of these measurements were performed at atmospheric pressure, and only Chakraborty et al and Tiwikrama et al conducted the density measurements at high pressures. PEGs, such as poly(ethylene glycol) ethers, are also useful raw materials in industrial applications.…”

Section: Introductionmentioning

confidence: 99%

PVT Properties of Binary Systems of Poly(ethylene glycol mono-4-octylphenyl ether) with Anisole or Benzyl Alcohol at Pressures up to 50 MPa

Chung

Tiwikrama

et al. 2023

J. Chem. Eng. Data

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Densities were determined experimentally for the binary mixtures of poly(ethylene glycol mono-4-octylphenyl ether) (PEGOPE) + anisole or benzyl alcohol at 298.15−348.15 K and pressures from 0.1 to 50 MPa. All of the excess volumes are negative over the whole experimental conditions, indicating that the hydrogen-bonding effect is dominant in these two binary systems. Those isothermal and isobaric excess volumes correlate well with the Redlich−Kister equation. The specific volumes of the pure components and their mixtures were correlated with the Schotte and Flory−Orwoll−Vrij (FOV) equations of state to average absolute relative deviations (AARDs) no greater than 0.03%.

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Physicochemical investigations of polyethylene glycols with N, N dimethylacetamide

Cited by 21 publications

References 43 publications

Thermo-acoustical analysis of sorbic acid:(food preservative) in an aqueous solution containing propylene glycol:(PG) and hexylene glycol:(HG) by using an ultrasonic technique

Thermo-acoustical analysis of sorbic acid:(food preservative) in an aqueous solution containing propylene glycol:(PG) and hexylene glycol:(HG) by using an ultrasonic technique

Influence of physicochemical properties and structure of mixed solvents propylene glycol – macrogol 400 on their in vitro release

PVT Properties of Binary Systems of Poly(ethylene glycol mono-4-octylphenyl ether) with Anisole or Benzyl Alcohol at Pressures up to 50 MPa

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