| abstract |
ABA triblock polymers, the A block being rigid having a transition away from its rigid phase above 70 DEG C., the B block being wholly or partly ion-coordinating, elastomeric or amorphous, the B/A block length ratio being greater than 1. When the B block is complexed with an ionic salt these polymers act as polymeric electrolytes which may be used in cells etc. Preferred polymers are those where HC=CH sites in the polybutadiene segment of a polystyrene-polybutadiene-polystyrene polymer are replaced by -CH2CH-X-(CH2CH2O)m-R, where X is link, R is alkyl. A preferred salt is LiCF3SO3. |