Positron annihilation lifetime spectroscopy as a probe of free volume in plasticized solid polymer electrolytes

Forsyth, M., Meakin, P., MacFarlane, D. R. and Hill, A. J. 1995, Positron annihilation lifetime spectroscopy as a probe of free volume in plasticized solid polymer electrolytes, Electrochimica acta, vol. 40, no. 13-14, pp. 2349-2351.

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Title Positron annihilation lifetime spectroscopy as a probe of free volume in plasticized solid polymer electrolytes
Author(s) Forsyth, M.
Meakin, P.
MacFarlane, D. R.
Hill, A. J.
Journal name Electrochimica acta
Volume number 40
Issue number 13-14
Start page 2349
End page 2351
Publisher Elsevier Science Pub. Co.
Place of publication New York, N.Y.
Publication date 1995-10
ISSN 0013-4686
1873-3859
Keyword(s) plasticizers
solid polymer electrolytes
positron lifetimes
free volume
Summary A recent report on the correlation between enhanced polymer mobility and ionic conductivity at room temperature in plasticized polyether-urethane solid polymer electrolytes (Forsyth et al.[1]), has prompted the present investigation. Positron annihilation lifetime spectroscopy (PALS) has been used to study the effect of plasticizer addition on the room temperature free volume characteristics of the crosslinked polyether-urethane. The addition of low molecular weight plasticizers to the polyether-urethane results in a constant or decreasing mean free volume cavity radius, as measured by the orthoPositronium lifetime τ3, and a decreasing relative concentration of free volume cavities as measured by the ortho-Positronium intensity, I3. It is postulated that the plasticizers interrupt polymer-polymer interactions by occupying the inter- and intra-chain free volume. The plasticizer structure influences the polymerplasticizer interactions which affect inter- and intra-chain separation and hence the free volume of the system. The decrease in polymer-polymer interaction and the increase in polymer-plasticizer interaction in turn influence the glass transition temperature behaviour.
Language eng
Field of Research 039999 Chemical Sciences not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©1995, Elsevier Science Ltd.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030137

Document type: Journal Article
Collection: Institute for Technology Research and Innovation
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