METHOD OF DETERMINING MOLECULAR MASS DISTRIBUTION OF ETHOXYSILOXANE OLIGOMERS IN HYDROLYZED AND NONHYDROLYZED ETHYL SILICATES

摘要

FIELD: analytical methods in the field of silicon-containing polymers. ^ SUBSTANCE: invention relates to manufacturing ceramic shell molds for precision metal molding according to molded templates using express control of binder for shell molds. Invention involves high-efficiency chromatographic columns filled with super-cross-linked polydivinylbenzene as sorbent and operated with absolute aliphatic alcohols, e.g. ethanol, as eluent. Calibration curve is preliminarily plotted using specially synthesized samples of individual ethoxysiloxane oligomers. ^ EFFECT: reduced determination time and avoided use of toxic eluents in chromatographic procedure. ^ 2 cl, 2 tbl