Compositional effect on the morphology and ionic conductivity of thermoplastic polyurethane based electrolytes

Ten Chin Wen, Yu Lin Du, Mohanlal Digar

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

Four thermoplastic polyurethanes (TPUs) were synthesized from poly(ethylene glycol) (PEG), 4,4′-methylenebis(phenyl isocyanate) (MDI), and 1,4-butanediol (1,4-BDO) with different 1,4-BDO/PEG ratios. The effect of polymer structure on the conductivity of the polymer elelctrolytes was investigated. Fourier transform infrared spectroscopy (FT-ir) and differential scanning calorimetry (DSC) were utilized to monitor changes in the morphology of the TPUs as polymeric solid electrolyte doped with LiClO4. The structure of the TPUs has been investigated by 1H solution nuclear magnetic resonance spectroscopy. Alternating current (AC) impedance experiments were performed to determine the ionic conductivities of TPU films and their corresponding gel type electrolytes. The conductivity depends on the soft-segment concentration and on the degree of phase separation exhibited by these materials. One of the investigated TPU gel type electrolytes exhibits an ionic conductivity as high as 3 × 10-4 S/cm at room temperature.

Original languageEnglish
Pages (from-to)1039-1048
Number of pages10
JournalEuropean Polymer Journal
Volume38
Issue number5
DOIs
Publication statusPublished - 2002 May

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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