Decreased solubility of alkali metal salts by heating in poly (ethylene oxide) oligomers
โ Scribed by Hiroyuki Ohno; Kaori Ito; Hitoshi Ikeda
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 460 KB
- Volume
- 68
- Category
- Article
- ISSN
- 0167-2738
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The polarity of poly(ethy1ene oxide) (PEO) oligomers and PEOlsalt mixed system was analyzed as the negative solvafochromism and halochromism of betaine dye, ## 2,6-diphenyE-4-(2,4,6-triphenylpyridinio) phenolate (1). The polarity of PEO oligomers, detected as the shift of the absorption maximum o
The kinetics of ethylene oxide polymerization in THF, with Na, K and Cs-naphthalene complexes as initiators, have been studied in detail. Polymerization is first order with respect to monomer without chain termination or transfer. The complicated dependence of the polymerization rate on active cent