Densities and Viscosities for Binary Mixtures of Poly(ethylene glycol) 400 + Dimethyl Sulfoxide and Poly(ethylene glycol) 600 + Water at Different Temperatures

Abstract

We report herein the density, viscosity, and excess properties of poly(ethylene glycol) 400 (PEG 400) + dimethyl sulfoxide (DMSO) and 600 (PEG 600) + water binary mixtures at temperatures from (298.15 to 323.15) K and (298.15 to 308.15) K, respectively, covering the whole composition range at atmospheric pressure. The excess molar volumes (V m E) and viscosity deviation (Δη) were calculated using the measured density and viscosity of the binary systems. They were correlated as a function of temperature and composition and fitted by the Redlich–Kister polynomial equation. The results of pure PEG 400 and 600 were also obtained and were compared with the data reported in previous literature.

Coalescence-based assessment of aerosol phase state using dimers prepared through a dual-differential mobility analyzer technique

“…The former readily crystalizes at RH < 40% (Ciobanu et al 2010), well above the RH at the entrance of the monomer selection DMAs (typically 10-20%). The latter has a liquid viscosity of 0.135 Pa¢s at 25 C (Zhang et al 2011), well below the threshold for coalescence. PEG-600 begins transitioning from a waxy solid to liquid phase at 32 C with maximum melting at 22 C (Sarier and Onder 2008) and PEG-600 always peaked near the expected D c .…”

Simple and efficient Knoevenagel synthesis of (E)-2-((1H-indol-3-yl)methylene)-3-oxoindolylnitrile catalysed by PPh3

“…Reaction of 3a (i.e., R 1 =R 2 =H) with DMS in the presence of PEG-600 gave N, N-disubstituted olefins with high yields compare to in the presence of PEG-400 and PEG-200, the reason is due to its higher viscosity of PEG-600 22 will help reacting partners to overcome entropy barriers. The rate of the reaction in different solvent mediums described in table 3.…”

Determination and prediction of solubilities of active pharmaceutical ingredients in selected organic solvents

“…The densities at T = 298.15 K and P = 0.1 MPa of the organic solvents were also measured using a precision digital Anton Paar oscillating u-tube densimeter (DMA 4500) with a reproducibility of 10 -2 kg/m 3 . The experimental values for the densities of the materials are shown with the literature values [27,28] in Table 4.…”