Structural characterization of oligomers from the polycondensation of citric acid with ethylene glycol and long-chain aliphatic alcohols
Structural characterization of oligomers from the polycondensation of citric acid with ethylene glycol and long-chain aliphatic alcohols
复制标题
DOI：
10.1002/app.11664
复制
发表时间：
2003-04-11
影响因子：
3
通讯作者：
Ortiz, P
中科院分区：
文献类型：
--
作者：
Barroso-Bujans, F;Martínez, R;Ortiz, P
The structural characterization of polyesters of citric acid (CA) with ethylene glycol and long-chain aliphatic alcohols (ROH), prepared by the composition of the reaction mixture being adjusted slightly away from stoichiometric equivalence, was performed with H-1- and C-13-NMR spectroscopy. The aliphatic alcohols employed were I-decanol, 1-dodecanol, and 1-octadecanol. The C-13-NMR carbonyl region presented four groups of signals, two corresponding to the ester groups and two corresponding to the acid groups. However, symmetric and asymmetric groups of CA moieties were identified in the C-13-NMR spectra. The ester yield from ROH decreased as the number of carbon atoms in the alcohols increased. (C) 2003 Wiley Periodicals, Inc.
