Ternary polymer composites for gel electrolytes via a mixture design approach

T. T. Cheng, Ten-Chin Wen

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A systematic modeling analysis for the swollen weight (Sw) and the room temperature conductivity (σ25) of the composite electrolytes of polyethylene glycol based waterborne polyurethane-polytetramethylene gylcol based polyurethane-polyethylene oxide (denoted as WPU (PEG)-WPU (PTMG)-PEO) was performed. Using a mixture design approach, empirical models are fitted and plotted as contour diagrams which facilitate revealing the synergistic/antagonistic effects among the mixed polymers. The contour plots show that the maximum Sw appears at point X3 (PEO 95%, WPU (PEG) 5%), while the maximum σ25 (1.8 x 10-3 S cm-1) appears in the ternary region (WPU(PEG) 19 ∼ 38%, WPU(PTMG) 9 ∼ 21%, and PEO 47 ∼ 68%). The results are reasonably explained from the interactions among polymers on the basis of their molecular structures. The thermal analysis of the composite films is performed to demonstrate the speculations about the interactions among the mixed polymers. Arrhenius plots of conductivities reveal that the composite electrolytes within the maximum σ25 region possess the maximum conductivity from 5°C to 65°C with the activation energy of 5.67 kcal mol-1.

Original languageEnglish
Pages (from-to)533-543
Number of pages11
JournalJournal of the Chinese Institute of Chemical Engineers
Issue number6
Publication statusPublished - 2000 Nov 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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