A 1H and 13C n.m.r. study of the products from direct polyesterification of ethylene glycol and terephthalic acid
✍ Scribed by Roger Pétiaud; Hugues Waton; Quang-Tho Pham
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 403 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0032-3861
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Starch can be oxidised to obtain a high-solid, low-viscous dispersion with minimum retrogradation, properties that are of technical importance especially in the paper industry. Alkaline hypochlorite, the most common commercial oxidant, introduces carbonyl and carboxylic functions, and also causes de
Pellets of poly(ethylene terephthalate) (PET; 0.48-1.92 g) were heated in anhydrous ethylene glycol (EG; 5 mL) with 2-equivs of NaOH at 150ЊC for 80 min or 180ЊC for 15 min to convert them quantitatively to disodium terephthalate (Na 2 -TPA) and EG. The disodium salt was precipitated quantitatively