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Showing 1 to 20 of 47 for “"WAXS"”.
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Modification of clays with ionic liquids for polymer nanocomponents
… from aqueous solution as confirmed by FTIR, EDX, WAXS, TGA, and elemental analysis. WAXS indicated a significant increase of interlamellar spacing as a result of intercalation, depending on the cation size. In addition, TGA demonstrated that thermal decomposition of the modified montmorillonites …
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X-ray Scattering Study Of Capillary Condensation In Mesoporous Silica
… In-situ small and wide angle x-ray scattering(S/WAXS) were used to study the deformation with respect to relative vapor pressure of the fluid. Periodic mesoporous silica such as MCM-41 and SBA-15 were synthesized and used as the samples with water as the capillary condensation agent.The gas …
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Phase transitions of poly (l-lactic acid) in bulk and in solution
… wide- and small-angle x-ray scattering (WAXS and SAXS) are adopted as the primary experimental techniques. Crystallization during annealing and drawing in melt-spun PLLA fibers is studied by WAXS with a quantitative evaluation of crystallinity and orientation. This represents the study of …
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Investigation of Phase-Separated Polymeric Materials via X-ray Scattering Techniques
… wide-angle X-ray scattering methods (USAXS/SAXS/WAXS). Specifically, these experimental techniques are employed to investigate the phase separated morphologies that impart unique properties to each class of materials and allow for their use in advanced applications. It is crucial that the …
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Effects of solvents on thermotropic liquid crystalline copolyesters
… of chemical etching coupled with SEM and WAXS was utilized to obtain structural information. Morphological changes that occur when these materials are exposed to solvents such as dioxane or acetone and dye carriers were also studied using SEM. Electron microscopy results on the thermally …
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Morphology of water-blown flexible polyurethane foams
… using DMS, DSC, FTIR, TEM, SEM, swelling, WAXS, and SAXS. A high degree of phase separation occurs in these foams and the degree of phase separation is independent of water (hard segment) content. In the foam with the lowest water content the morphology is similar to that of typical …
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Structure property behavior of an ethylene-propylene-diene ionic terpolymer containing zinc stearate
… indicated non-Gaussian behavior for all samples. WAXS indicates that a portion of the ZnSt crystals hold their orientation upon stress release. The ZnSt loaded and unloaded systems had distinctly different morphologies. Both SEM and WAXS studies of the 303-50 sample indicated small ZnSt particles …
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Determining the role of charges in ionic polymer blend systems
… wide-angle x-ray scattering (GI-WAXS). From DSC, the blends were found to melt at the same temperatures as the homopolymers but crystallize at much lower temperatures (at least a 20°C shift) due to slower kinetics. The blend kinetics were studied quantitatively via POM spherulite …
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Characterization of the crystallinity and mechanical properties of CTFE & CTFE copolymeric films as a function of cooling rate and the implications on adhesion
… a function of cooling rate was characterized by WAXS and FTIR. As expected, the degree of crystallinity decreased as the cooling rate increased. Analysis of mechanical properties as a function of cooling rate by tensile testing showed that the mechanical behavior of the films became more ductile …
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Lineare und verzweigte Blockcopolymere aus Polypeptiden und synthetischen Polymeren
… Lösung erfolgte mittels Streumethoden (SAXS, WAXS, DLS) sowie abbildender Methoden (TEM). Durch Einsatz der Blockcopolymere als polymere Stabilisatoren in der Emulsionspolymerisation wurden Oberflächen funktionalisierte Latizes erhalten. Als Beispiel für eine pharmazeutische Anwendung wurden …
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Doppelthydrophile Blockcopolymere als Mineralisationstemplate
… TEM charakterisiert. Röntgenweitwinkelstreuung (WAXS) wurde verwendet, um die Modifikation von Calciumcarbonat zu ermitteln und die Größe der Calciumcarbonat- und Bariumsulfat-Nanopartikel zu ermitteln.
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Processing and structure-property behavior of microporous polyethylene: from resin to final film
… films were examined by TEM, HSEM, birefringence, WAXS, SAXS, and linear IR dichroism. The molecular weight distribution of the raw resins as well as the specific processing variables of quench height and melt temperature were found to be important in determining the final structure of the HDPE …
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Study of microstructure evolution in F/M steel T91 by in-situ synchrotron wide-angle X-rays scattering
… In situ Wide-angle X-ray Scattering (WAXS) was used to investigate T91 during tensile test under 3 different temperatures: room temperature (RT), 450C, 550C, respectively. By fitting scattering patterns, information of diffraction peaks and their variation trends with respect to …
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Synthesis and Characterization of immobilized Gold Nanoparticles and Binary Gold Nanoalloys on Cationic Spherical Polyelectrolyte Brushes and their Application as a Catalyst
… Detailed studies by wide angle X-ray scattering (WAXS) and high resolution transmission electron microscopy (HR-TEM) show an amorphous morphology of the gold nanoparticles in the range of 1 nm. This kind of generation allow us to generate gold nanoparticles in the range of 1.0 and 2.5 nm on the …
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Studying the Effect of Zinc 3-(Dibutylamino) Propionate (ZDAP) Additive on Fire Retardant, Mechanical, and Physical Characteristics of Epoxy-Amine Networks
… of these samples was analyzed with SEM/EDX and WAXs showing that ZDAP was degrading to ZnO char in a two-step breakdown. My research has found that the epoxy-amine composite Epon 828-Jeffamine D230 when loaded 15 wt/wt% ZDAP had its peak rate of heat release reduced by 38%. Furthermore, at loads …
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Binary diamondoid molecular gels
… Wide-angle and Small-angle X-ray Scattering (WAXS and SAXS) are used to investigate the gel’s microstructure. Particular attention is paid to determine the applicability of models for colloidal gelation to these molecular gels.
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Simultane Röntgenklein- und Weitwinkelstreuung an kristallisierenden Polymeren
… (SAXS) führt, aber keine Positionsfernordung (WAXS) besitzt. Beim Aufheizen beobachtet man einen direkten Übergang in den Kristall. Die Strukturgrößen der Trans-Mesophase und der kristallinen Lamellen sind identisch.
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Processing Extrudable Sheets using Decoloured Bloodmeal
… analysis (DMA) and wide-angle X-ray scattering (WAXS). Blending DBT with PLA increased the tensile strength and modulus of DBT while strain at break decreased. The glass transition temperature of the blends increased compared to neat DBT. SEM revealed a more homogenous microstructure, which …
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Flüssigkristalline smektische Seitenketten Blockcopolymere : Synthese und Strukturierung
… lamellarer Morphologie wurde mit SAXS, WAXS und TEM in dicken Filmen (300-1100µm) untersucht. <br>Das Orientierungsverhalten 50-60nm dünner Filme wurde mittels USAXS, AFM, Polarisationsmikroskopie und TEM untersucht. <br>Die Strukturbildung in dünnen Filmen wurde auf unterschiedlichen …
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Morphological studies of polymeric systems with liquid crystalline order
… (SAXS), and wide angle X-ray scattering (WAXS) are the tools employed. Two-dimensional Ndel inversion walls formed in a nematic monodomain during magnetic realignment of a highly elastically anisotropic thermotropic liquid crystal polyether are examined via PLM and AFM.
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