燃料化学学报2017，Vol.45Issue(7)：837-845,9.
聚甲氧基二甲醚的合成及其物理化学性质表征
Synthesis and physicochemical characterization of polyoxymethylene dimethyl ethers
摘要
Abstract
Polyoxymethylene dimethyl ethers (H3CO(CH2O)nCH3, PODEn or DMMn, n≥2) with unique physical and chemical properties are a potential additive for diesel fuels, which can effectively enhance the combustion efficiency and reduce the emission of pollutants. In this work, a series of pure PODEn components (n = 2-5) were synthesized from methylal and trioxymethylene and obtained with high purity through collaborative separation; their structure and properties were characterized by NMR, FT-IR, Raman, and DFT calculation and a detailed assignment of the expressions in the spectrogram to the various groups was performed. The density and viscosity of PODEn were measured at 298. 15-323. 15 K. The results indicate that the density and viscosity of PODEn decrease gradually with the increase of temperature. Meanwhile, with the increase in the number of-CH2 O-units ( n) from 2 to 5, the density, viscosity, flash point, pour point, and the heat of fusion and solidification of PODEn are all increased. These results are valuable for the practical synthesis and application of PODEn .关键词
聚甲氧基二甲醚/合成/结构表征/物理化学性质Key words
polyoxymethylene dimethyl ethers/synthesis/structural characterization/physicochemical property分类
化学化工引用本文复制引用
康美荣,宋河远,金福祥,陈静..聚甲氧基二甲醚的合成及其物理化学性质表征[J].燃料化学学报,2017,45(7):837-845,9.基金项目
The project was supported by the National Natural Science Foundation of China (21473225).国家自然科学基金(21473225)资助 （21473225）
