Polystyrene with oligo(oxyethylene)cyclophosphazene
Polymer and Materials Science
Wiley InterScience Backfile Collection 1832-2000
Chemistry and Pharmacology
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Ionic conductivities of complexes of polystyrene derivatives having a spacer, —CH2O(CH2CH2O)n— (poly-(SEDEP), n = 1; poly(SDEDEP), n = 2), between backbone and pendant penta(methoxyethoxyethoxy)cyclotriphosphazene with LiClO4 were investigated as functions of temperature and salt concentration. The glass transition of temperature of poly(SEDEP) and poly(SDEDEP) was observed at -64 and -65°C, respectively. The extent of Tg elevation of the Li+-polymer complexes was not affected by the difference of spacer in the host polymers. The conductivities of the complexes exhibit non-Arrhenius temperature dependence. The conductivities of poly(SDEDEP)-Li+ complexes were somewhat higher than those of poly(SEDEP) systems and the maximum value close to 10-4 S/cm at 50°C has been achieved at [Li+]/O = 0.08. The results are compared with those obtained previously for the complexes based on polymers which have the similar structures but no spacer, and the correlation between the conduction mechanism and polymer characteristics is discussed.
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