Composite Electrolytes Comprising Polytetramethylene/Polypropylene Glycol-Based Waterborne Polyurethanes and Polyethylene Oxide via a Mixture Design Approach
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- 作者：Ten-Chin Wen ; Hwang-Shin Tseng ; and Tsung-Tien Cheng
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2000
- 出版时间：January 2000
- 年：2000
- 卷：39
- 期：1
- 页码：72 - 78
- 全文大小：199K
- 年卷期：v.39,no.1(January 2000)
- ISSN：1520-5045
文摘
The composite electrolytes (CEs) were prepared by impregnating the ternary compositescomprising polypropylene glycol-based waterborne polyurethane (denoted as WPU(PPG)),polytetramethylene glycol-based waterborne polyurethane (denote as WPU(PTMG), and polyethylene oxide (PEO) with LiClO4/PC. The data of the swollen weight (Sw) and the room-temperature conductivity (
25) for CEs were fitted as empirical regression equations by usingmixture design. These empirical equations were used to construct contour plots, facilitatingcomparisons of synergistic/antagonistic effects among the mixed polymers. The contour plotsshow that the maximum Sw (64.3%) appears at point X3 (PEO 95% and WPU(PPG) 5%), whilethe maximum 25 (
10-3 S/cm) appears in a wide region (WPU(PPG) = 5-43%, WPU(PTMG) <37%, and PEO > 27%). Differential scanning calorimetry (DSC) results showed immiscibilitybetween WPU(PTMG) and PEO and partial immiscibility between WPU(PPG) and WPU(PTMG)/PEO. A polarized micrograph (PM) of the composites was also examined for PEO spherulites.The contour plot results of Sw and 25 can be explained by the interactions among polymers onthe basis of their molecular structures, also evidenced by both DSC and PM results.
25) for CEs were fitted as empirical regression equations by usingmixture design. These empirical equations were used to construct contour plots, facilitatingcomparisons of synergistic/antagonistic effects among the mixed polymers. The contour plotsshow that the maximum Sw (64.3%) appears at point X3 (PEO 95% and WPU(PPG) 5%), whilethe maximum 25 (10-3 S/cm) appears in a wide region (WPU(PPG) = 5-43%, WPU(PTMG) <37%, and PEO > 27%). Differential scanning calorimetry (DSC) results showed immiscibilitybetween WPU(PTMG) and PEO and partial immiscibility between WPU(PPG) and WPU(PTMG)/PEO. A polarized micrograph (PM) of the composites was also examined for PEO spherulites.The contour plot results of Sw and 25 can be explained by the interactions among polymers onthe basis of their molecular structures, also evidenced by both DSC and PM results.