Measurement of density, viscosity and vapor pressure of tetrakis(trimethylsiloxy)silane, 3-ethenyl-1,1,1,5,5,5-hexamethyl-3-[(trimethylsilyl)oxy]trisiloxane and (γ-chloropropyl)tri(trimethylsiloxy)silane

IF 2.7 3区工程技术 Q3 CHEMISTRY, PHYSICAL Fluid Phase Equilibria Pub Date : 2025-08-01 Epub Date: 2025-02-06 DOI:10.1016/j.fluid.2025.114367

Xu Long, Tingyu Liu, Shuting Zhang, Hong Dong, Chuan Wu

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Abstract

The saturation temperatures of tetrakis(trimethylsiloxy)silane (TTMS), 3-ethenyl-1,1,1,5,5,5-hexamethyl-3-[(trimethylsilyl)oxy]trisiloxane (VTMS) and (γ-chloropropyl)tri(trimethylsiloxy)silane (TClTMS) were measured over the pressure ranges (3.000 to 91.000) kPa. The density data and viscosity values of TTMS, VTMS, and TClTMS were obtained over the temperature ranges (298.15 to 328.15) K. The density values show a reasonable correlation that can be accurately described with a linear equation. The relationship between the viscosity of these compounds and temperature is strongly supported by the Ghatee, Litovitz, Andrade, and Vogel-Tammann-Fulcher equations, demonstrating their reliability and predictive power. The saturated vapor pressure values were estimated using the Clarke-Glew and Antoine equations. The critical properties of pressure, temperature, and volume were calculated using the group contribution method, specifically the Nannoolal model. The acentric factor (ω) at a reduced vapor pressure was calculated by these critical parameters. The calculated ESP map, HOMO and LUMO energy display the electron density and potential energy. The thermodynamic properties of TTMS, VTMS, and TClTMS are crucial values for designing and operating industrial separation processes.

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四（三甲基硅氧基）硅烷、3-乙基-1,1,1,5,5,5-六甲基-3-[（三甲基硅氧基）氧]三硅氧烷和（γ-氯丙基）三（三甲基硅氧基）硅烷的密度、粘度和蒸气压的测定

测定了四（三甲基硅氧基）硅烷（TTMS）、3-乙基-1,1,1,5,5,5-六甲基-3-[（三甲基硅氧基）氧]三硅氧烷（VTMS）和（γ-氯丙基）三（三甲基硅氧基）硅烷（TClTMS）在压力范围（3.000 ~ 91.000）kPa下的饱和温度。在298.15 ~ 328.15 k的温度范围内，得到了TTMS、VTMS和TClTMS的密度数据和粘度值，密度值具有合理的相关性，可以用线性方程精确描述。Ghatee, Litovitz， Andrade和Vogel-Tammann-Fulcher方程有力地支持了这些化合物粘度和温度之间的关系，证明了它们的可靠性和预测能力。利用Clarke-Glew和Antoine方程估算了饱和蒸汽压值。压力、温度和体积的关键性质使用群体贡献法，特别是Nannoolal模型计算。用这些关键参数计算了降低蒸汽压时的离心系数（ω）。计算得到的ESP图、HOMO和LUMO能量显示了电子密度和势能。TTMS， VTMS和TClTMS的热力学性质是设计和操作工业分离过程的关键值。

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来源期刊

Fluid Phase Equilibria 工程技术-工程：化工

CiteScore

5.30

自引率

15.40%

发文量

223

审稿时长

53 days

期刊介绍： Fluid Phase Equilibria publishes high-quality papers dealing with experimental, theoretical, and applied research related to equilibrium and transport properties of fluids, solids, and interfaces. Subjects of interest include physical/phase and chemical equilibria; equilibrium and nonequilibrium thermophysical properties; fundamental thermodynamic relations; and stability. The systems central to the journal include pure substances and mixtures of organic and inorganic materials, including polymers, biochemicals, and surfactants with sufficient characterization of composition and purity for the results to be reproduced. Alloys are of interest only when thermodynamic studies are included, purely material studies will not be considered. In all cases, authors are expected to provide physical or chemical interpretations of the results. Experimental research can include measurements under all conditions of temperature, pressure, and composition, including critical and supercritical. Measurements are to be associated with systems and conditions of fundamental or applied interest, and may not be only a collection of routine data, such as physical property or solubility measurements at limited pressures and temperatures close to ambient, or surfactant studies focussed strictly on micellisation or micelle structure. Papers reporting common data must be accompanied by new physical insights and/or contemporary or new theory or techniques.