NMR based determination of minute acid functionality: end-groups in PET

Y. Ma, U.S. Agarwal, J.A.J.M. Vekemans, D.J. Sikkema

Research output: Contribution to journalArticleAcademicpeer-review

18 Citations (Scopus)

Abstract

Conditions are detd. for the carbodiimide-mediated room temp. esterification of the carboxylic acid end-groups of poly(ethylene terephthalate) with hexafluoroisopropanol. The hexafluoroisopropyl ester is quantified with 19F NMR, using a,a,a-trifluorotoluene as a secondary std. This provides a technique for accurate detn. of minute amts. of carboxylic acid functionality in small samples of polymers, and potentially in animal- and plant-based foods. [on SciFinder (R)]
Original languageEnglish
Pages (from-to)4429-4434
JournalPolymer
Volume44
Issue number16
DOIs
Publication statusPublished - 2003

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