Dynamic mechanical thermal analysis studies of factors influencing relaxation in polyetherurethane based solid electrolytes

Ng, S. T. C., Joliffe, C., Goodwin, A., Forsyth, M. and MacFarlane, D. R. 1998, Dynamic mechanical thermal analysis studies of factors influencing relaxation in polyetherurethane based solid electrolytes, Electrochimica acta, vol. 43, no. 10-11, pp. 1499-1503.

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Title Dynamic mechanical thermal analysis studies of factors influencing relaxation in polyetherurethane based solid electrolytes
Author(s) Ng, S. T. C.
Joliffe, C.
Goodwin, A.
Forsyth, M.
MacFarlane, D. R.
Journal name Electrochimica acta
Volume number 43
Issue number 10-11
Start page 1499
End page 1503
Publisher Elsevier Science Pub. Co.
Place of publication New York, N.Y.
Publication date 1998-04
ISSN 0013-4686
1873-3859
Keyword(s) polymer electrolytes
dynamic mechanical thermal analysis
mechanical relaxation
plasticizers
glass transition temperature
Summary Dynamic mechanical thermal analysis (DMTA) has been used to study the effects of plasticizers on the mobility and homogeneity of a series of solid polymer electrolytes (SPEs). With reference to previously published results on similar systems containing LiClO4 salts and tetraglyme as plasticizer, the effects of propylene carbonate (PC) on the glass transition temperature (Tg) of the SPE and on the distribution of relaxation times within the sample are discussed; at low plasticizer concentration PC has little effect on Tg as measured by DMTA in comparison with tetraglyme, and at higher plasticizer concentrations PC significantly broadens the mechanical relaxation behaviour indicating a greater degree of dynamical heterogeneity within the sample. A second low temperature relaxation is evident at lower PC contents indicating that some regions of this plasticized SPE are distinctly more mobile than others or perhaps, on this length scale, that some degree of phase separation is present. Activation energies for the mechanical relaxation were also determined as a function of PC concentration and are significantly greater than those determined from conductivity measurements.
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 ©1998, Elsevier Science Ltd.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030224

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