Conductivities of poly(ethylene oxide) and poly(2-vinyl pyridine) blend

Min Hui Cui, Dong Hua Cheng, Jun She Guo, Hong Quan Xie

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Poly(ethylene oxide) (MW 20,000) and poly(2-vinyl pyridine) (MW 35,000) were blended with LiClO4 or KSCN through a solution blending process. When the molar ratio of ethylene oxide/Li or K is 10, the blend of poly(ethylene oxide)(80 wt%)/poly(2-vinyl pyridine)(20 wt%) with LiClO4 or KSCN is a transparent elastomer. The ionic conductivities of these blends are 1.5 × 10-5 and 8.8 × 10-5 S/cm at 25°C, respectively. At 30°C the poly(ethylene oxide)(80 wt%)/poly(2-vinyl pyridine)(20 wt%) blends with KSCN at an ethylene oxide/K molar ratio of 10 exhibit an ionic conductivity value of 1.5 × 10-4 S/cm, a high value for ionic conductive polymers. At an ethylene oxide/Li molar ratio of 15 and a 2-vinyl pyridine/TCNQ molar ratio of 2, the mixed (ionic-electronic) conductivities of poly(ethylene oxide)(80 wt%)/poly(2-vinyl pyridine)(20 wt%) blends are higher than either ionic or electronic conductivities. When the molar ratio of ethylene oxide/Li and 2-vinyl pyridine/TCNQ are 10 and 2, respectively, the mixed (ionic-electronic) conductivities are intermediate between the ionic and electronic conductivities. Differential scanning calorimetry (DSC) shows that LiClO4 and TCNQ can compatibilize with the PEO/P2VP blend.

Original languageEnglish (US)
Pages (from-to)247-259
Number of pages13
JournalJournal of Macromolecular Science - Pure and Applied Chemistry
Volume33
Issue number3
DOIs
StatePublished - Jan 1 1996
Externally publishedYes

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Polymers and Plastics
  • Materials Chemistry

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