J. Szymanowski, P. Kusz, E. Dziwiński
1989
Citations
0
Influential Citations
6
Citations
Journal
Journal of Chromatography A
Abstract
Abstract Degradation of model and commercial polyoxyethylene glycol monoalkyl ethers in the presence of anhydrous ferric chloride and an excess of acetyl chloride was studied. It was found that 2-chloroethyl acetate is the main product of the polyoxyethylene chain degradation. Hydrophobic alkyls form mainly unidentified resins. 2,6-Dimethyl-γ-pyrone and its derivatives are by-products formed from acetyl chloride and acetic acid. Using an internal standard method, the composition of the products obtained by degradation of polyoxyethylene chains can be determined and used to calculate the average degree of ethoxylation. However, this method is limited to preparations for which the hdyrophobes can be identified and their contents determined.