Abstract: A comb-shaped polynier (BM350) with oligo-oxyetliylene side chains of thetype-O (CH₂CH₂O)₇CH₃ was prepared from methyl vinyl ether /maleic anhydridecopolymer- Honiogeneous aniorplious polymer electrolyte cornplexes were madefrom the conib polymer and LiCF₃SO₃ by solvent casting from acetone, and theirconductivities were nieasured as a function of temperature and salt concentration.Maxiniuni conductivity close to 5.08 ×10^-5 Scm^-1 was obtained at room tempera-tureancl at a [Li]/[EO] ratio of about 0.12.The conductivity which displayednon-Arrheni us behaviour was analyzed using the Vogel-Tammann-Fulcher equationand interpreted on the basis of the configurational entropy model.The results of mid-IR sliowed that the coortlination of Li⁺ to side chains made the C-O-C bandbecome broader and shift sliglitly- X-ray photoelectron spectroscopy analysis indi-cated that the oxygen atonis in the two situations could coordinate to Li⁺ and thiscoortlination resulted in the reduction of the electron orbit binding energy of FandS.

Key words: Polynier electrolyte, Ionic conductivity, LiCF₃SO₃ salt complexes, Ion-IC transport