Synthesis of poly(ethylene oxide-diene-ethylene oxide) triblock copolymers. Characterization and use as solid polymer electrolytes

✍ Scribed by C. Le Deore; T. Hamaide; P. Masson; B. Gallot

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 504 KB
• Volume: 27
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(91)90068-y

✦ Synopsis

Poly(ethylene oxide~diene-cthylene oxide) triblock copolymers were synthesized by anionic polymerization and characterized by FT-IR, DSC and low angle X-ray scattering. Both glass transition temperature of the elastomer segment and melting temperature of the poly(ethylene oxide) (PEO) crystalline phase depend on the composition of the triblock copolymers, suggesting the hard and soft segments are not totally phase-segregated. The X-ray scattering experiments indicate a lamellar structure, with a small contraction after complexation of lithium perchlorate by the PEO phases. Some products were used in conjuction with high molecular weight PEO at various concentrations as solid polymer electrolytes and the temperature dependence of their ionic conductivity was investigated.