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Showing 1 to 20 of 577 for “"differential scanning calorimetry"”.
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Microstructure Control and Crystallization Kinetics in Amorphous Cadmium-Germanium - Arsenide (Devitrification, Differential Scanning, Calorimetry)
… form of this compound was investigated using Differential Scanning Calorimetry. The basic operating principles of the two currently most popular DSC instruments (the DuPont 1090 DSC and the Perkin-Elmer DSC7) in the context of glass crystallization kinetics are critically evaluated and …
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Investigation of Spontaneous Combustion Inhibition of Coal Fires Utilizing Differential Scanning Calorimetry and Thermogravimetric Analysis
… including thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) were used to analyze these effects. Results showed these novel formulations can reduce spontaneous combustion potential, making coal more thermally stable. Mechanisms by which these formulations inhibit coal …
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Assessing differential scanning calorimetry as a retrospective dosimetry method for the verification of uranium enrichment activities
… (PTFE) and the thermal analysis techniques differential scanning calorimetry (DSC) and fast scanning calorimetry (FSC). The DSC-PTFE system shows statistically significant sensitivity in the dose ranges expected. The FSC-PTFE system demonstrates reduced precision compared to the DSC-PTFE …
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Crystallization and Melting Studies of Poly(ε-caprolactone) and Poly(ethylene oxide) using Flash™ Differential Scanning Calorimetry and Preparation and Characterization of Poly(δ-valerolactone) Fractions
… poly(ε-caprolactone) were correlated using fast differential scanning calorimetry. The melting kinetics was found to be independent of isothermal crystallization temperature and time. The conventional Hoffman-Weeks method could not be used to determine the equilibrium melting temperature because …
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A Morphological Study of PFCB-Ionomer/ PVdF Copolymer Blend Membranes For Fuel Cell Application
… material, using small angle x-ray scattering, differential scanning calorimetry, atomic force micrscopy, and some other techniques to a lesser extent. Small angle x-ray scattering (SAXS) of pure S-PFCB showed a strong block copolymer- associated phase separation, on the order of 25 nm. …
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Synthesis and Characterization of Well-Defined Poly(1,3-Cyclohexadiene) Homopolymers and Copolymers
… on the thermal properties was examined using differential scanning calorimetry. In addition, the thermooxidative properties of these poly(1,3-cyclohexadiene) polymers were characterized in a series of oxidative studies and the onset of oxidative degradation occurred at 110° C. Perfectly …
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Processing - Structure - Property Relationships in Catalyst Cured Epoxy Systems (Morphology)
… analysis, free oscillation torsion pendulum, differential scanning calorimetry (DSC), tensile mechanical test, and transmission electron microscopy (TEM) were employed in the investigation.
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A Study of Crystallization in Bisphenol-A Polycarbonate
… The length of the induction period determined by differential scanning calorimetry and wide-angle X-ray diffraction varied by over 6 hours because differential scanning calorimetry can detect a smaller amount of crystallinity than wide-angle X-ray diffraction. Signs of pre-ordering in the …
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The origin of multiple DSC melting peaks of Fischer-Tropsch hard waxes
The differential scanning calorimetry (DSC) analyses of the Fischer-Tropsch (FT) hard waxes display multiple melting peaks, the origin of which is unknown. The phenomenon is sometimes referred to in the literature, but no attempt has been made to explain its cause. There are a few known causes of …
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Synthesis and basic characteristics of segmented poly(arylene ether sulfone)-poly(arylate) copolymers
… a critical value of about 15 weight percent. Differential scanning calorimetry, optical microscopy, and wide angle X-ray scattering were used to probe the copolymer morphology. The chemical structures of the segmented copolymers were studied through the use of Fourier transform infrared …
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Porous Materials Prepared by Ultrasonic Spray Pyrolysis
… TEM). Analysis of the carbon precursors using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) suggests that the decomposition behavior of each precursor is responsible for the observed morphology differences. These carbon materials often have high surface areas and …
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Effect of heat treatment on dyeability, glass transition temperature, and tensile properties of polyacrylonitrile fibers (orlon 42)
… transition temperatures (Tg) were obtained by differential scanning calorimetry. The ratio of the intensities of the CN/CH stretching bands were found by infrared spectroscopy, using the KBr method
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The synthesis and characterisation of novel long chain dimethyl siloxane surfactants.
… (in particular optical polarising microscopy, differential scanning calorimetry, nuclear magnetic resonance spectroscopy and x-ray diffraction studies). Conventional surfactants comprise a polar head group and a hydrophobic, hydrocarbon chain ie. they are amphiphilic. Because long chains have …
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A Novel Acetaminophen Soft-Chew Formulation Produced Via Hot Melt Extrusion With Inline Near-Infrared Monitoring As A Process Analytical Technology Tool
… extrusion to monitor the quality consistency. Scanning electronic microscopy images of tablets' cross-section were taken by Joel model sem. Differential scanning calorimetry was used to characterize the crystal states of each formulation. Texture profile analysis test was used to evaluate the …
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Physico-chemical properties of polypropylene glycols
… molecular mass were characterized using differential scanning calorimetry, modulated differential scanning calorimetry, thermogravimetry and thermally stimulated current (TSC) spectroscopy. It was shown, by TSC, that the glass transition temperature and the degree of molecular mobility …
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ΜΕΛΕΤΗ ΤΗΣ ΕΠΙΔΡΑΣΗΣ ΟΞΕΙΔΙΩΝ ΣΤΟΙΧΕΙΩΝ ΜΕΤΑΠΤΩΣΕΩΣ ΣΤΙΣ ΧΗΜΙΚΕΣ ΚΑΙ ΦΥΣΙΚΟΜΗΧΑΝΙΚΕΣ ΙΔΙΟΤΗΤΕΣ ΤΟΥ ΚΛΙΝΚΕΡ
… AND CEMENT HYDRAMON WAS STUDIED BY MEANS OF DIFFERENTIAL SCANNING CALORIMETRY. X-RAY DIFFRACTION OPTICAL AND ELECTRON SCANNING MICROSCOPY. BASED ON THE EXPERIMENTAL RESULTS IT WAS POSSIBLE TO CLARIFY THE ACTION OF THE ABOVE OXIDES ON RAW MATERIAL SINZERING AND ON CEMENT HYDRATION. IN …
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Quality attributes of breads made from wheat-millet composite flours fortified with vital wheat gluten
… loaves were assessed by dough rheology tests, differential scanning calorimetry (DSC), and both objective and sensory evaluation. Farinograph results indicated that millet flour decreased absorption (water uptake) when compared to the control, decreased peak time for dough development and dough …
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Part I: Self-Assembling Dendrimers Using the Dda-Aad Hydrogen Bonding Motif. Part II: Supramolecular Discotic Liquid Crystals Through Hydrogen Bond Mediated Self-Assembly
… hexamer in apolar solvents. The studies by differential scanning calorimetry (DSC), polarized light microscopy (PLM) and X-ray diffraction (XRD) indicate that the hexameric disks can stack in bulk to form thermotropic columnar mesophases. The mesophases exist across a large temperature range …
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Ring-opening metathesis polymerization of 3-substituted cyclooctenes initiated by group 6 alkylidene complexes
… and ¹³C NMR, size-exclusion chromatography, and differential scanning calorimetry, and hydrogenated to generate the corresponding saturated polymer.
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