## Abstract 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 ^1^H‐ and ^13^C‐NMR spectr
Cyclic oligomers from ethylene glycol-adipic acid polycondensation
✍ Scribed by Anthony C Davis
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 201 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0032-3861
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📜 SIMILAR VOLUMES
The polyesterification between adipic acid and ethylene glycol in nonequimolar ratios was investigated. The kinetic equations obtained were quite different from those obtained by Flory in equimolar systems. The kinetic equations obtained in this study were -d[COOH]/dt = k [COOH] [OHI2 for uncatalyze
## Abstract **Summary:** Reaction of active esters of __O__‐protected D‐and L‐tartaric acid with L‐lysine 2,5‐diketopiperazine afforded optically active low molecular weight compounds with __T__~g~ __≈__ 130 °C. ^13^C NMR results indicated that the condensation product consisted of cyclic oligomers