Can I calculate the% NCO in a polyurethane prepolymer via FT-IR-?

10 October 2019 1 5K Report

I need to calculate the content of NCO in an isocyte (prepolymer) which I will then have to react with a polyol, to give a polyurethane, I would like to know if it is possible to calculate the content of NCO via FT-IR (currently we carry out this analysis by titration); in order to make it react that then the isocyanate can react completely with the polyol, and therefore maintain the ratio 1/1

V R Arun Prakash

Try for EDAX or 13C NMR

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