PEG 400 和 PEG 4000 在不同温度下烟酸水溶液中分子相互作用的体积和超声研究,Journal of Chemical & Engineering Data

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PEG 400 和 PEG 4000 在不同温度下烟酸水溶液中分子相互作用的体积和超声研究
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2021-05-21 , DOI: 10.1021/acs.jced.0c01091
Nabaparna Chakraborty ₁ , Kailash Chandra Juglan ₁ , Harsh Kumar ₂

Affiliation

在 288.15–318.15 K 的多个温度下，在 0.07、0.08 和 0.09 mol·kg ^{–1 的}浓度下测量了分子量为 400 和 4000 的 PEG 在烟酸水溶液中的密度和声速值。利用这些实验数据，确定表观摩尔性质和偏摩尔性质以分析烟酸水溶液与聚（乙二醇）（400/4000）的相互作用。体积参数，例如表观摩尔体积V _ϕ、偏摩尔体积V _ϕ⁰和偏摩尔转移体积 Δ V _ϕ⁰, 是使用实验密度值获得的，而声学参数，即表观摩尔等熵压缩K _ϕ,S、部分摩尔等熵压缩K _ϕ,S⁰和转移的部分摩尔等熵压缩 Δ K _ϕ,S⁰ , 由声速数据决定。这些正的体积表观和偏摩尔特性表明存在强烈的溶质 - 溶剂相互作用。偏摩尔膨胀率 ( E _ϕ⁰ ) 及其一阶导数 (∂ E _ϕ⁰ /∂ T ) _P被计算。此外，分别使用转移的偏摩尔等熵压缩和偏摩尔体积获得对和三重系数。

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Volumetric and Ultrasonic Studies of Molecular Interactions of PEG 400 and PEG 4000 in Aqueous Niacin Solutions at Different Temperatures

At multiple temperatures, 288.15–318.15 K, the density and speed of sound values for PEGs of molecular weights 400 and 4000 in aqueous niacin solutions were measured at concentrations of 0.07, 0.08, and 0.09 mol·kg^–1. Utilizing these experimental data, the apparent molar properties and partial molar properties were determined to analyze the interactions in aqueous niacin solutions with poly(ethylene glycol)s (400/4000). The volumetric parameters, such as apparent molar volume, V_ϕ, partial molar volume, V_ϕ⁰, and partial molar volume of transfer, ΔV_ϕ⁰, are obtained using experimental density values, while the acoustic parameters, i.e., apparent molar isentropic compression, K_ϕ,S, partial molar isentropic compression, K_ϕ,S⁰, and partial molar isentropic compression of transfer, ΔK_ϕ,S⁰, are determined with the speed of sound data. These positive volumetric apparent and partial molar properties suggest the presence of strong solute–solvent interactions. The partial molar expansibilities (E_ϕ⁰) along with their first derivative (∂E_ϕ⁰/∂T)_P were calculated. Further, pair and triplet coefficients are obtained using partial molar isentropic compression and partial molar volume of the transfer, respectively.

更新日期：2021-06-10

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