Abstract Significant information regarding the molecular interactions in the ternary solution consisting of Vitamin B3 (Niacin), water and polyethylene glycols (PEG 200/PEG 600) are attained from the calculated volumetric and acoustic parameters. Initially, the density ( ρ ) and speed of sound ( c ) for polyethylene glycols (0.1 to 0.5) mol∙kg-1 in aqueous niacin (0.01, 0.02, and 0.03) mol∙kg-1 were measured under 0.1 MPa pressure as a function of temperature at (293.15-308.15) K. Utilizing the experimental density values, the apparent Molar Volume ( V ϕ ) , Partial Molar Volume ( V ϕ 0 ) and Partial Molar Volume of transfer (Δ V ϕ 0 ) are calculated and the apparent Molar Isentropic compression ( K ϕ , S ), Partial Molar Isentropic compression ( K ϕ , S 0 ) and Partial Molar Isentropic compression of transfer (Δ K ϕ 0 ) are estimated using the speed of sound. The empirical constants a, b, and c along with the pair and triplet coefficients ( V AB , V ABB , K AB , K ABB ) are calculated.

中文翻译：

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不同温度下烟酸水溶液中聚乙二醇的体积和超声研究

摘要 从计算的体积和声学参数中获得了关于由维生素 B3（烟酸）、水和聚乙二醇（PEG 200/PEG 600）组成的三元溶液中分子相互作用的重要信息。最初，聚乙二醇（0.1 至 0.5）mol∙kg-1 在烟酸水溶液（0.01、0.02 和 0.03）mol∙kg-1 中的密度 ( ρ ) 和声速 ( c ) 在 0.1 MPa 压力下测量为(293.15-308.15) K 处温度的函数。利用实验密度值，计算表观摩尔体积 ( V ϕ ) 、部分摩尔体积 ( V ϕ 0 ) 和部分摩尔转移体积 (Δ V ϕ 0 ) 并表观摩尔等熵压缩 ( K ϕ , S ), 部分摩尔等熵压缩 ( K ϕ , S 0 ) 和传递的部分摩尔等熵压缩 (Δ K φ 0 ) 是使用声速估计的。计算经验常数 a、b 和 c 以及成对和三元组系数（V AB 、V ABB 、K AB 、K ABB ）。