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The density ( ρ ) and kinematic viscosity ( v ) in the scope of T  = (298.15 to 323.15) K were systemically studied for 1,4-butanediol (BDO) (1) + dimethyl sulfoxide (DMSO) binary mixture with various compositions at atmospheric pressure. From the ρ and v values, the dynamic viscosity ( η ) were also obtained. According to the above experimental values, viscosity deviation (∆ η ), excess molar volume ( V m E ), partial molar volumes ( V 1 ¯ and V 2 ¯ ), apparent molar volume ( V φ ,1 and V φ ,2 ) and isostatic pressing thermal expansion ( α p ) were determined. The ρ , V m E and ∆ η values were fitted by using Jouyban-Acree model, Eyring equation, and Redlich-Kister equation, respectively. Additionally, the intermolecular interplay was analyzed using FTIR, NMR, and UV–vis spectra, which suggested the formation of hydrogen bonds between the hydroxyl H atoms in BDO and the O atoms in DMSO. [ABSTRACT FROM AUTHOR]

Dynamic viscosity (v), density (ρ), and surface tension (γ) of the 1,3-propanediol (1,3-PDO) (1) + 1,2-propanediamine (1,2-PDA) (2) binary system with different ratios were studied at the temperature range of 293.15 to 318.15 K and atmospheric pressure. After that, the corresponding v iscosity (η) values were calculated from the experimental v and ρ values. From these basic data, viscosity deviation (∆η), surface tension deviation (∆ γ), excess molar volume (V m E ), apparent molar volume (V φ,1 and V φ,2), partial molar volume (V 1 ¯ and V 2 ¯), and isostatic thermal expansion coefficient (α p) were calculated. The V m E , ∆η , and ∆γ values were used to assess the standard deviations (σ) by using the Redlich-Kister (R-K) equation. In addition, combined with FTIR, UV–Vis, FLS, and 1H NMR technologies, the interaction analysis between 1,3-PDO and 1,2-PDA concluded that the intermolecular hydrogen bonding in the system existed as the possible form of -O-H···N-. • Densities and excess volumes for the 1,3-PDO (1) + 1,2-PDA (2) binary system • Viscosities and viscosity deviation for the 1,3-PDO (1) + 1,2-PDA (2) binary system • Surface tension and surface tension deviation for the 1,3-PDO (1) + 1,2-PDA (2) binary system • Intermolecular interaction analyzed as -O-H⋯N- [ABSTRACT FROM AUTHOR]

• ·A quick way to check errors. • ·To obtain more accurate partial molar volume values • ·To fit with the Redlich-Kister polynomialmolar volume [ABSTRACT FROM AUTHOR]

Abstract The density (ρ) and dynamic v iscosity (v) data of the N , N ‑dimethylformamide (DMF) + triethylene glycol (TEG) binary mixtures were measured in the entire mole fraction at five equidistant temperatures from (293.15 to 318.15) K under atmospheric pressure. On the basis of ρ and v data, he apparent molar volume (V φ ,1 and V φ ,2), partial molar volume (V 1 ¯ and V 2 ¯), excess molar volume (V m E ), viscosity deviation (Δ η), and excess volume expansivity rate (α E ) values were calculated. In the whole molar fraction range, all the V m E values were negative and presented the minimum values at x 1 ≈ 0.43. To explore intermolecular interaction between DMF and TEG, pure DMF, pure TEG and their mixtures were characterized by FTIR, UV–Vis, and 1H NMR technologies. The consequences suggested that hydrogen bond between hydroxyl H atoms of TEG and O atoms of DMF was formed as follows: (CH 3) 2 N CH O⋯HO CH 2 CH 2 O CH 2 CH 2 O CH 2 CH 2 OH⋯O CH N(CH 3) 2. Highlights • Densities and excess volumes for the binary system of DMF + TEG were reported. • Viscosities and viscosity deviation for the binary system of DMF + TEG were reported. • Intermolecular interaction was discussed as CH 2 OH⋯O CH N(CH 3) 2. [ABSTRACT FROM AUTHOR]

• To revise the calculation of partial molar volumes and the pure molar volume. • To present the revised Tables 9 and 15. • To recalculate the pure molar volumes. [ABSTRACT FROM AUTHOR]