Search results for "Polyethylene oxide"

showing 2 items of 12 documents

Morphology of solid polymer electrolytes: a TR WAXS investigation

2002

A wide angle X-ray scattering investigation of (polyethylene oxide)n–sodium thiocyanate [(PEO)nNaSCN] mixtures is reported. Temperature dependence analysis for different mixtures is shown, in order to rationalize the multi-phase behaviour. Depending on the amount of salt added and upon the temperature considered three different phases have been found to simultaneously coexist: crystalline PEO, amorphous PEO, and crystalline complex.

Statistics and Probabilitychemistry.chemical_classificationPhase transitionMorphology (linguistics)Materials scienceThiocyanateScatteringPolymer electrolytesSalt (chemistry)Polyethylene oxideCondensed Matter PhysicsAmorphous solidchemistry.chemical_compoundchemistryChemical engineeringPhysica A: Statistical Mechanics and its Applications
researchProduct

Thermodynamics of Aqueous Poly(ethylene oxide)−Poly(propylene oxide)−Poly(ethylene oxide)/Surfactant Mixtures. Effect of the Copolymer Molecular Weig…

2004

A calorimetric study was performed to focus attention on the interactions between copolymers and anionic surfactants in aqueous solutions. Three aspects were analyzed: (1) the hydrophobicity of the surfactant, (2) the change of the copolymer molecular weight, and (3) the nature of the hydrophilicity of the copolymer. To this purpose, the family of sodium alkanoates (sodium octanoate through sodium dodecanoate) and the triblock copolymers EO76PO 29EO76 (F68), EO103PO39EO 103 and EO132PO50EO132 were investigated. Comparing F68 and EO13PO30EO13 (L64), previously studied by us, provided information on the effect of the copolymer hydrophilicity. The experimental data were analyzed by means of a …

chemistry.chemical_classificationPoly(propylene oxide)Aqueous solutionChemistryOxideSurfaces Coatings and FilmsChain lengthchemistry.chemical_compoundPulmonary surfactantPolymer chemistryMaterials ChemistryCopolymerPhysical and Theoretical ChemistryPolyethylene oxides Micelles scattering DLSAlkylPoly ethyleneThe Journal of Physical Chemistry B
researchProduct