Polyether/salt hybrid: 6. Effect of sulfonamide ends having different alkyl groups on the bulk ionic conductivity

✍ Scribed by Yoichi Tominaga; Kaori Ito; Hiroyuki Ohno

• Book ID: 104164487
• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 284 KB
• Volume: 38
• Category: Article
• ISSN: 0032-3861
• DOI: 10.1016/s0032-3861(96)00726-4

✦ Synopsis

Poly(ethylene oxide) (PEO)/salt hybrids having sulfonamide groups on the PEO chain ends (PEOlooo -(SAR)2M2; R = -CF 3, -CH 3 and -C6H5; M = Li, Na, K, Rb and Cs) were prepared, and the bulk ionic conductivity was measured as a new type of ion conductive matrix. Among these, the salt having a trifluoromethyl sulfonamide group showed the highest ionic conductivity (for example, 2.83 × 10 -5 Scm -1 at 303 K for potassium salt). Although there was little difference in the glass transition temperature (Tg) for these salts and the same average molecular weight of the PEO part, there was a considerable difference in the ionic conductivity. The difference was attributed to the dissociation constant of sulfonamide groups depending upon the terminal alkyl groups.