Preparation and characterization of nanocomposites of polyethers and molybdenum disulfide
- Oregon State Univ., Corvallis, OR (United States)
Nanocomposites of poly(ethylene oxide) and molybdenum disulfide are prepared by the hydrolysis of lithiated molybdenum disulfide in an aqueous solution of PEO (mw 100 000) or poly[oxymethylene-oligo(oxyethylene)] (PEM, mw [approx] 70,000). X-ray diffraction indicates an expansion of 8.3 [angstrom] in the interlayer spacing (c [approx] 14.5 [angstrom]), consistent with the incorporation of a polymer double layer within the disulfide galleries. Reaction stoichiometries and elemental analyses indicate a composition of Li[sub 0.12](PEO)[sub y]MoS[sub 2] (y = 1.0-1.3) for the single-phase product. Analyses of extracted polymer demonstrate that high-molecular-weight polymer is present within the disulfide galleries. Scanning calorimetry of the nanocomposites indicates exothermic peaks at approximately 200 and 310 [degrees]C, which are demonstrated to be associated with an order/disorder phase transition and polymer decomposition, respectively. A fully amorphous, unstacked phase is irreversible generated by heating the nanocomposites at 200 [degrees]C for several hours. 28 refs., 6 figs., 1 tab.
- OSTI ID:
- 7126789
- Journal Information:
- Chemistry of Materials; (United States), Journal Name: Chemistry of Materials; (United States) Vol. 6:2; ISSN CMATEX; ISSN 0897-4756
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360601 -- Other Materials-- Preparation & Manufacture
360602* -- Other Materials-- Structure & Phase Studies
ALCOHOLS
CALORIMETRY
CHALCOGENIDES
CHEMICAL PREPARATION
COHERENT SCATTERING
COMPOSITE MATERIALS
DIFFRACTION
GLYCOLS
HYDROXY COMPOUNDS
LATTICE PARAMETERS
MATERIALS
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHASE TRANSFORMATIONS
POLYETHYLENE GLYCOLS
POLYMERS
REFRACTORY METAL COMPOUNDS
SCATTERING
STOICHIOMETRY
STRUCTURAL CHEMICAL ANALYSIS
SULFIDES
SULFUR COMPOUNDS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION