A series of aliphatic polyesters of 3,3'-thiodipropionic acid and linear glycols containing a different number of ethylene oxide groups has been prepared and characterized. These polymers show low values of glass transition temperature and appear, at room temperature, as highly viscous liquids, in which LiC104 can be dissolved easily. The resulting transparent semi-solid solutions behave as polymer electrolytes with high ionic conductivity, which has been investigated as a function of LiC104 concentration, temperature and chemical structure, i.e. the number of thioether sulfur and ether oxygen atoms in the backbone. The main factors that affect conductivity are the glass transition temperature and the solvating capacity for the lithium ions. It was found that both the oxygen and sulfur atoms contribute to solvating lithium ions.
Посилання на статтю:
Polymer electrolytes based on polyesters of thiodipropionic acid: 1. Synthesis, characterization and ionic conductivity measurements / P. Manaresi, M. C. Bignozzi, F. Pilati* and A. Munari // Polymer. – 1993. – Vol 34. – P. 2422-2426.