Application of Gas Chromatography to Qualitative and Quantitative Copolyamide Analysis

Abstract

A method is described for the gas chromatographic separation of the diacids (as the dimethyl esters) recovered from hydrolyzed copolyamides prepared from a single diamine-i.e., hexamethylenediamine- which will give both qualitative and quantitative results. The method requires only ≤0.2-gram samples, and has a relative error in accuracy of ±5%. The per cent 6 nylon in a copolyamide must be determined by difference, and with copolyamides made from more than one diamine, a calibration curve for each diamine must be prepared as well as for the diacids. © 1968, American Chemical Society. All rights reserved.