Study on ionic conductive property of polyurethane/oligo-ether sulfate complex

A new oligo-ether sulfate (SPEG) and linear polyether urethane(PU) have bee n synthesized successfully, and a series of novel solid polymer electrolyte s based on PU/oligo-ether sulfate complexes were prepared. Effects of tempe rature. salt concentration (O:Na+, the molar ratio of ether unit to sodium cation), content of SPEG and polydioxolane (PDXL) on morphological structur e and ionic conductive property were investigated in detail. It was found t hat oligo-ether sulfate had great effect on morphological structure of samp les. Results showed that ionic conductivity of this system could reach 10(- 5) S cm(-1) at medium temperature (60 degreesC) and temperature dependence of ionic conductivity was not an Arrhenius-type one. The ionic conductivity increased with increase of SPEG contest over whole range of salt concentra tion studied and ionic conductivity of SPU-600 was higher than that of SPU- 400 at the same O:Na+. In addition, plasticizer PDXL and its content signif icantly influenced the ionic conductive properties of the samples. (C) 2001 Elsevier Science Ltd. All rights reserved.