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Analysis of polyethylene glycol esters
Author(s) -
Malkemus J. D.,
Swan J. D.
Publication year - 1957
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02638281
Subject(s) - polyethylene glycol , saponification , ethylene glycol , chemistry , polyethylene , ethylene oxide , salt (chemistry) , organic chemistry , extraction (chemistry) , polymer , copolymer
Summary The products obtained by esterification of polyethylene glycols with fatty acid, or by means of the reaction of ethylene oxide with fatty acids, can be analyzed for their content of monoester, diester, and unreacted polyethylene glycol by taking advantage of the extractability of the polyethylene glycol with water. A hot salt solution is used to insure selective extraction. Saponification and hydroxyl numbers are used to calculate the composition of the mixture; the molecular weights of the acid and glycol are presumed to be known.