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Effects of coronands on ionic conductivities of complexes of poly[2-(4-vinylphenoxy)-2,4,4,6,6-penta(methoxyethoxyethoxyethoxy)cyclotriphosphazene] with LiClO4

✍ Scribed by Kenzo Inoue; Koutarao Takiue; Teiichi Tanigaki

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 482 KB
Volume: 34
Category: Article
ISSN: 0887-624X
DOI: 10.1002/(sici)1099-0518(199605)34:7<1331::aid-pola21>3.0.co;2-9

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✦ Synopsis

The effects of coronands such as crown ether and azacrown on the conductivity of complexes of LiClO, with poly[2-(4-vinylphenoxy)-penta(methoxyethoxyethoxyethoxy)cyclotriphosphazene] [poly(STEP)] were investigated. The extent of T, elevation of poly(STEP)-LiC10, with 18-crown-6 was comparable to that of the poly(STEP)-LiCIO, system. A similar behavior was observed for the system containing 12-crown-4. However, the increase in T, values is considerably suppressed when tetraazacyclotetradecane with methoxyethoxy group as a side arm (MTAC) is used. All of the additives are effective to improve the conductivity, and the maximum conductivities of lo-, S/cm at 30°C and S/cm at 90°C have been achieved for the complex of the poly(STEP)-LiClO,-MTAC system with Li+/O = 0.06, which are 3.5-7 times higher than those of poly(STEP)-LiC10, complexes. From the behaviors of T, elevation and the conductivity, the role of the coronands for the conduction of the multi-armed poly(STEP)-LiClO, system is discussed.

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