Báo cáo vật lý: "Comparison of the Effects of Organoclay Loading on the Curing and Mechanical Properties of Organoclay-Filled Epoxidised Natural Rubber Nanocomposites and Organoclay-Filled Natural Rubber Nanocomposites" pot

... Comparison of the Effects of Organoclay Loading 44 Figure 3: The effect of organoclay loading on maximum torque of NR and ENR nanocomposites. Comparing the NR nanocomposites ... Figure 4: The effect of organoclay loading on tensile strength of NR and ENR nanocomposites. Figures 5 and 6 show the effect of organoclay loading on stress at 100% elongation (M100) and stress ... facilitate the curing reaction of NR compounds. Journal of Physical Science, Vol. 20(2), 37–59, 2009 37 Comparison of the Effects of Organoclay Loading on the Curing and Mechanical...

Báo cáo vật lý: "EFFECTS OF Si, Al2O3 AND SiC SUBSTRATES ON THE CHARACTERISTICS OF DBRS STRUCTURE FOR GaN BASED LASER" ppsx

... substrate. Where and are the refractive indices of the substrate and the corresponding layer respectively, is the geometrical thickness of the corresponding quarter wave layers and sn2,1n2,1dBλ ... INTRODUCTION III-V nitride semiconductors offer a wide range of applications due to their wide direct band gap, which is not found in conventional semiconductors. The current semiconductor ... covers only the region between infrared to green [1]. The band gap of GaN at room temperature is 3.4 eV (corresponding to a wavelength of 365 nm in the ultraviolet region) and that of InN,...

Báo cáo vật lý: "Effects of Electrolyte Natures on the Formation of Well-Ordered Titania Nanotubes Produced Via Anodisation" potx

... for these applications, well-arrayed titania nanotubes are of interest due to their one-dimensional (1D) nature, ease of handling and simple preparation. Not only can the band gap of the material ... mouths were opened on the top of the layer, while the tubes were closed by the presence of a layer of titania on the bottom of the structure. Here in, we discuss the influence of different electrolyte ... open on the top [Fig. (6b)] of the layer, while the tubes were closed by the presence of a layer of titania on the bottom of the structure [Fig. (6c)]. Figure 6: FESEM micrograph of (a)...

Báo cáo vật lý: "Influence of the Silica-to-Surfactant Ratio and the pH of Synthesis on the Characteristics of Mesoporous SBA-15" ppt

... surfactant ratio and the pH of the synthesis gel can greatly influence the characteristics of the resulting materials as they generally control the formation of micelles during the synthesis.8 ... aspects of the synthesis processes are involved in developing these porous materials, and they still require greater insight and understanding. A basic understanding of the synthesis conditions ... Figure 4. In the case of these different silica contents, the XRD patterns show 2 reflections in the 2θ range of 1o–3o. The reflections were due to the ordered hexagonal array of parallel...

... equation (5). Understanding the changes in these two constant values would lead to a better understanding of the changes in the Ea. Observation of the trend of the curve-line from the left ... traditional properties of activation energy and infinite-temperature viscosity constants, and it contains a new constant that is the zero-temperature viscosity. The ration of zero- and infinite-temperature ... equation and, together with the infinite-temperature viscosity constant, represents the fundamental value of the Ea constant. The stability of the viscosity – temperature observation is best...

Báo cáo vật lý: "The Kinetics and Mechanism of the Core-shell Styrene-butyl Acrylate Polymerisation" pdf

... polymerisation rate of the styrene core, and k is the rate reaction constant in the formation of the styrene core. 3.4 Mechanism of Reaction in the Formation of the Styrene Core The order of the ... Polymerisation 40 the connection equation of the number of particles or polymerisation rates as a function of surfactant and initiator concentrations.2,5,6 The other theory for emulsion polymer ... formation experimentally and estimates of the emulsion polymerisation mechanism of synthesis for the obtained core and shell. The determination of the polymerisation reaction kinetics of the styrene...

Báo cáo vật lý: "PREPARATION OF SELENIUM-DOPED ACTIVATED CARBON AND ITS UTILIZATION FOR IMPROVING THE QUALITY OF USED COCONUT OIL" pps

... avoided. The procedure involved the long-term irradiation of the samples with thermal reactor neutrons and the measurement of the γ-rays of Se-75 thus produced. The irradiated samples in the Kartini ... by the calibration standards. Standards are prepared from certified solutions of known concentration of Se (500 mg/l). Standards are obtained from the National Bureau of Standards, IAEA, and ... autooxidation, enzymatic oxidation, reversion and polymerization.5,6 Consumption of the vegetable oil increases every year as a result of the increase in population. This condition forces...

Báo cáo vật lý: "EFFECT OF FIELD STRENGTH IN THE VELOCITY ANISOTROPY OF FERROFLUIDS" pptx

... counteracts the orientation of the magnetic moments into the direction of the field. In a strong field, most of the particles become oriented and the magnetization of the sample attain saturated.22 ... al.23 concluded that at equilibrium, the magnitude of the magnetization is a function of the strength of external magnetic field, the volume concentration of the magnetic particles (their magnetic ... Under the effect of an external magnetic field, the particles of the ferrofluid aggregate and chain-clusters appear to arrange along the direction of the field. The perusal of Table 2 further...

Báo cáo vật lý: "ULTRASONIC STUDY OF THE SELF–ASSOCIATION OF ANILINE IN ETHANOL-CYCLOHEXANE MIXTURES" pptx

... splitting of a major component or (ii) the enlargement of existing molecules due to the added component. The contribution due to first reason will make the net inward chaos to be more and hence the ... INTRODUCTION The understanding of intermolecular interactions between polar and non-polar component molecules can be best made by ultrasonic investigations and they find applications in several ... study the speed of sound and isentropic compressibilities of mixtures containing polyethers and ethyl acetate at 298.15 K and they discussed the dipole-dipole interactions between the components...

Báo cáo vật lý: "Phase Transformation of Rust in the Presence of Various Tannins" pot

... adsorption of the tannins to the rusty surface, (ii) complexation of ferrous/ferric ions or complexation of surface iron Phase Transformation of Rust 38 Figure 6: XRD patterns of a ... stabilizing action, resulting in the formation of more dense and pore free corrosion or rusted layers, may affect the protective property of tannins used.5 In addition, the composition of the rust ... designate the presence of lepidocrocite while the peak at 472 cm–1 designates the presence of magnetite (Fig. 1). Among these bands, 1021 cm–1 was the strongest and could be considered...

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