Local environment in poly(ethylene oxide)-zinc bromide complexes
- Univ. of Oklahoma, Norman, OK (United States)
This study examines atomic-level local environments in Poly(ethylene oxide)-zinc bromide+lithium bromide (PEO){sub 20}[(ZnBr{sub 2}){sub 1-x} (LiBr){sub x}] complexes using Raman spectroscopy and x-ray absorption spectroscopy (XAS). Specific features in the Raman spectra were used to show that the zinc bromide species changes from ZnBr{sub 2} to ZnBr{sub 3}{sup -} to ZnBr{sub 4}{sup 2-} when x is varied from 0 to 0.8. XAS showed a similar change in oxygen coordination number from 4 to 0 when x is varied from 0 to 0.8. This study shows that lithium atoms displace zinc atoms from ether oxygen speciation indicating that lithium coordination to ether oxygens is thermodynamically favored. The effect of adding polar plasticizers is also discussed.
- OSTI ID:
- 602858
- Report Number(s):
- CONF-961108-; TRN: 98:001968-0026
- Resource Relation:
- Conference: Annual meeting of the American Institute of Chemical Engineers (AIChE), Chicago, IL (United States), 10-15 Nov 1996; Other Information: PBD: 1996; Related Information: Is Part Of 1996 First joint topical conference on processing, structure and properties of polymeric materials; PB: 594 p.
- Country of Publication:
- United States
- Language:
- English
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