Abstract
An analytical procedure is described for the rapid qualitative and quantitative analysis of polyester-based polyurethane elastomers. The elastomers are normally the complex reaction products of an isocyanate-terminated linear polyester prepolymer cross-linked with either a diamine or a diol chain extender. The polymer is cleaved into the corresponding diamine, dicarboxylic acid and glycol acetate fragments by acid fusion using mixed anhydride reagent. These products are analysed by using gas chromatography, after separation using a liquid-liquid extraction procedure. Dicarboxylic acids are converted to dimethyl ester derivatives before gas chromatographic analysis, while diisocyanates are examined as the diamines and diols as acetyl derivatives.
Published Version
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