Browsing by Author "Wang, L"

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Study of poly(ethylene oxide) electrolyte with polyurethane/sulfonate side chains
(2001-10-17)
Wang, XL
;
Fang, B
;
Wang, L
;
Tang, XZ
;
Chang, FC
Sulfonated dimethyl fumarate (SDMF) was prepared. Poly(ethylene oxide) (PEO) with sodium sulfonate side chains (SPEO) was synthesized by transesterification between SDMF and PEO with molecular weights of 200, 400, 600, 800, and 1000. The SPEO was subsequently mixed as a plasticizer with PEO polyurethane (PU). Samples were characterized by elemental analysis, FTIR, H-1-NMR, gel permeation chromatography, and impedance analysis. The mixture exhibited a homogeneous domain. The maximum conductivity of the CPU1000/SPEO600 was 2.6 x 10(-7) S cm(-1) at room temperature. The relation between the ionic conductivity and the temperature was in agreement with the Arrhenius equation. (C) 2001 John Wiley & Sons, Inc.
Syntheses of poly(ethylene oxide) polyurethane ionomers
(2000-07-05)
Wang, XL
;
Wang, L
;
Li, H
;
Tang, XZ
;
Chang, FC
Sulfonated dimethyl fumarate (SDMF) was prepared with dimethyl fumarate (DNF) and sodium hydrogensulfite (NaHSO3). Sodium sulfonate side-chain poly(ethylene oxide) (SPEO) was synthesized by grafting sodium sulfonate onto the chain of PEO with molecular weights of 400, 600, 800, and 1000. SPEO was used subsequently in step-growth polymerization to give a polyurethane ionomer (SPU). Samples were characterized by element analysis, FTIR, H-1-NMR, EDX mapping, X-ray, gel permeation chromatography, and impedance analysis. The SPUs exhibited an amorphous structure. The maximum conductivity of the SPU was 1.02 x 10(-6) S cm(-1) at the room temperature. (C) 2000 John Wiley & Sons, Inc.