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Polymer Testing | Vol.56, Issue.0 | | Pages 174-179

Determination of molar ratio of primary secondary and tertiary amines in polymers by applying derivatization and NMR spectroscopy

Marcel Zhu Qing Liu

Abstract

A trifluoroacetic acid derivatization combined with ¹H NMR spectroscopy method for determining the molar ratio of primary, secondary, and tertiary amines in small molecules and polymers was discussed. Amines reacted with trifluoroacetic acid to form their salts RNH3 ⁺, R2NH2 ⁺, and R3NH⁺. The ¹H NMR signals of these protonated amines (NH3 ⁺, NH2 ⁺, and NH⁺) were separated well in the spectra. Based on the integration of these protonated amine signals, the molar ratio of primary, secondary, and tertiary amines can be calculated.

Original Text (This is the original text for your reference.)

Determination of molar ratio of primary secondary and tertiary amines in polymers by applying derivatization and NMR spectroscopy

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Keywords

tertiary amines sup locpre1suph nmr spectroscopy method primary secondary acid

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Marcel Zhu,Qing Liu,.Determination of molar ratio of primary secondary and tertiary amines in polymers by applying derivatization and NMR spectroscopy. 56 (0),174-179.

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