Preparation and characterization of nanocomposites of polyethers and molybdenum disulfide

Journal Article · Tue Feb 01 00:00:00 EST 1994 · Chemistry of Materials; (United States)

DOI:https://doi.org/10.1021/cm00038a018· OSTI ID:7126789

Lemmon, J P; Lerner, M M ^[1]

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1. 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), Vol. 6:2; ISSN 0897-4756
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
PHASE TRANSFORMATIONS
MOLYBDENUM SULFIDES
STRUCTURAL CHEMICAL ANALYSIS
POLYETHYLENE GLYCOLS
CALORIMETRY
CHEMICAL PREPARATION
LATTICE PARAMETERS
STOICHIOMETRY
X-RAY DIFFRACTION
ALCOHOLS
CHALCOGENIDES
COHERENT SCATTERING
DIFFRACTION
GLYCOLS
HYDROXY COMPOUNDS
MATERIALS
MOLYBDENUM COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
REFRACTORY METAL COMPOUNDS
SCATTERING
SULFIDES
SULFUR COMPOUNDS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
360602* - Other Materials- Structure & Phase Studies
360601 - Other Materials- Preparation & Manufacture