Poly(ethy1ene terephthalate) copolymers were prepared by melt polycondensation of dimethyl terephthalate and excess ethylene glycol with 10- 40 mol% (in feed) of poly(ethy1ene glycol) (E) and poly(tetramethy1ene glycol) (B), with molecular weight (MW) of E and B 200-7500 and 1000, respectively. The
Mechanism of solution of poly(ethylene terephthalate) in ethylene glycol
✍ Scribed by A. A. Petrov; É. M. Aizenshtein
- Publisher
- Springer US
- Year
- 1981
- Tongue
- English
- Weight
- 601 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0015-0541
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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
The solubilities of nitrogen, oxygen, argon, methane, and carbon dioxide in thin films of crystalline oriented poly(ethy1ene terephthalate) in the glassy state were studied by the static sorption method. High pressure sorption isotherms were obtained for carbon dioxide. Results indicate that, above