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Anionic copolymerisation of ethylene oxide and propylene oxide. Investigation of double-bond content by NMR spectroscopy

✍ Scribed by Ga-Er Yu; Frank Heatley; Colin Booth; Trevor G. Blease

Book ID
103076594
Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
495 KB
Volume
31
Category
Article
ISSN
0014-3057

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✦ Synopsis

Abstract_(:opolymers of ethylene oxide and propylene oxide were prepared to low conversion at temperatures in the range &8o"C, and the number of unsaturated end groups relative to copolymerised oxypropylene groups in each sample was determined by NMR spectroscopy. The data were analysed to yield values of the two transfer constants, r& and C,r.P, for proton abstraction by oxyethylene and oxypropylene oxyanions respectively, and, from the temperature dependences of r& and C,r,P and relevant published data, values of the activation energies for the two transfer reactions.

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