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1 H and 13 C NMR determination of the hydroxy end‐groups in poly(oxypropylene)s
Author(s) -
Kříž Jaroslav,
Stehlíček Jaroslav
Publication year - 1994
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1994.021951214
Subject(s) - chemistry , proton nmr , nmr spectra database , carbon 13 nmr , end group , stereochemistry , spectral line , organic chemistry , copolymer , physics , polymer , astronomy
1 H and 13 C NMR signals of tri(propylene glycol) and of its benzoate and phenyl urethane were assigned by means of 1D and 2D NMR methods such as super‐selective long‐range INEPT, H‐H COSY, H‐C COSY and H‐H‐C RCT spectra. Both 1 H and 13 C NMR were used as methods for the determination of primary and secondary hydroxy end‐groups and of their degree of conversion. 13 C NMR was found to be a reliable and universal method of end‐group determination even for cases where 1 H NMR fails due to the presence of water in the sample or to the nature of the reactant. The results are applied to the analysis of poly(oxypropylene)s with two or three hydroxy end‐groups and their derivatives.