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Analysis of the 1H and 13C NMR spectra of poly(t-butyl-ethylene oxide) and of block and statistical copolymers of t-butyl-ethylene oxide and ethylene oxide

✍ Scribed by Frank Heatley; Ga-Er Yu; Jane Lawrance; Colin Booth

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 557 KB
Volume: 30
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(94)90135-x

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✦ Synopsis

Resonances in the 500 MHz ~H and 75.5 MHz t3C NMR spectra of poly(t-butyl-ethylene oxide) and of block and statistical copolymers of t-butyl-ethylene oxide and ethylene oxide prepared using an anionic initiator have been assigned with the aid of 2-dimensional COSY spectra and DEPT subspectral editing. Monomer placement occurs almost entirely by head-to-tail addition, and in the homopolymers, isotactic enchainment is approximately twice as favourable as syndiotactic, t3C chemical shifts have been rationalised by a simple substituent increment scheme.

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