Pressure–Volume–Temperature Relationships of Tetraethyl, Tetrapropyl, and Tetrabutyl Orthosilicates

Hiroaki Matsukawa,Aki Fujii,Katsuto Otake,Taka-Aki Hoshina

doi:10.1021/acs.jced.1c00499

Abstract

Pressure–Volume–Temperature Relationships of Tetraethyl, Tetrapropyl, and Tetrabutyl Orthosilicates

Highlights

The physicochemical properties of substances such as density, kinematic viscosity, and vapor−liquid equilibrium are closely related to the chemical processes that involve them and are, essential information for the design of these processes
Each alkyl group in the Tetraalkyl orthosilicates (TAOS) is substituted with a methyl group in tetramethyl orthosilicate (TMOS), an ethyl group in tetraethyl orthosilicate (TEOS), a propyl group in tetrapropyl orthosilicate (TPOS), and a butyl group in teterabutyl orthosilicate (TBOS)
Hasegawa and Sakka[8] reported that the time variations in the distribution and molecular weight of the silicate species were almost identical for solutions of all of the orthosilicates tested in sol−gel reactions, suggesting that the differences in the alkyl group of the TAOS had a minimal effect on the hydrolysis and polycondensation processes

Summary

Introduction

The physicochemical properties of substances such as density, kinematic viscosity, and vapor−liquid equilibrium are closely related to the chemical processes that involve them and are, essential information for the design of these processes. Because these measurements require specialized equipment and are time-consuming, the experimental data reported on them are often insufficient. Hasegawa and Sakka[8] reported that the time variations in the distribution and molecular weight of the silicate species were almost identical for solutions of all of the orthosilicates tested in sol−gel reactions, suggesting that the differences in the alkyl group of the TAOS had a minimal effect on the hydrolysis and polycondensation processes. Several other researchers have studied the hydrolyzability of silicon alkoxides.[1,10−13] In

Methods

Results

Conclusion