Microextensometry by Image Correlation Applied to Micromechanical Studies Using the Scanning Electron Microscopy
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Mineral Fillers in Thermoplastics: Filler Manufacture and Characterisation
The principal mineral fillers used in thermoplastics and the reasons for using them are identified, together with those features that have to be controlled in order to achieve the optimum results and to avoid associated deleterious effects. General methods of filler production are outlined in the light of these requir…
Systematic Study of Properties of Extrudates with Incorporated Metakaolin or Silica Fume
This study systematically investigates the properties of extruded cement-based short polyvinyl alcohol (PFA) fiber reinforced plates with added metakaolin and silica fume. The enhancing effects of the two mineral admixtures on the mechanical properties of the plates are compared by the direct tensile test, freezing an…
Calibration Specimens for Determining Energy-Dispersive X-ray k-Factors of Boron, Nitrogen, Oxygen, and Fluorine
: We have fabricated amorphous thin-film specimens containing light elements (B, C, N, O, F, and Mg) in addition to silicon, and have measured their composition using electron energy-loss spectroscopy (EELS). The films appear to be stable during storage in air and during irradiation by an electron beam, for doses belo…
Magnetomechanical properties of single crystal Terfenol-D
Quasi-static and dynamic magnetomechanical measurements have been made on a twin-freeoriented single crystal of Tb/sub 0.27/Dy/sub 0.73/Fe/sub 2/ (Terfenol-D). Unusually large values of dynamic strain coefficient, d/sub 33/, and magnetomechanical coupling coefficient, k/sub 33/, of 19.1 nm A/sup -1/ and 0.83 respectiv…
Synthesis of α-alkyl ω-trimethoxysilane polyoxazolines and their application as coatings on glass fibres
A novel class of telechelic α-alkyl ω-trimethoxysilane poly(N-propionylethylene imine)s (TMS-PPEls) has been synthesized by living cationic ring-opening polymerization of 2-oxazolines. A new route for the termination reaction of the living polyoxazoline is described. These block copolymers have been tested as coatings…
Synthesis, structure, and reactivity of macro cyclic heterobimetallic complexes of (Co, Cu), (Co, Ni), (Co, Zn), (Zn, Cu), (Zn, Ni) combinations
A series of macrocyclic heterobimetallic complexes of type [M c (tntnam)M o ](PF 6 ) n and [M c '(tntnim)Ni](PF 6 ) n where M c = Co(III) and Zn(II), M c ' = Co(II), Co(III), and Zn(II), and M o = Ni(II), Cu(II), and Zn(II) have been synthesized and characterized. The macrocyclic ligands tntnim 2 and tntnam 3 contain…
Electrochemical studies of 254SMO stainless steel in comparison with 316L stainless steel and Hastelloy C276 in phosphoric acid media in absence and presence of chloride ions
The electrochemical behaviour of 254SMO stainless steel in phosphoric acid media, both with and without chloride ions, has been investigated and compared with that of 316L stainless steel and Hastelloy alloy C276. Open circuit potential measurements, potentiodyn amic polarisation curves, and SEM analyses were used in…
Control of the Dynamics of Photogenerated Carriers at the Boron-Doped Diamond/Electrolyte Interface by Variation of the Surface Termination
Control of the Dynamics of Photogenerated Carriers at the Boron‐Doped Diamond/Electrolyte Interface by Variation of the Surface Termination, Yagi, Ichizo, Tsunozaki, Kentaro, Tryk, Donald A., Fujishima, Akira
Blob instability in rotating compositional convection
The onset and structure of compositional convection in a rotating system are investigated experimentally. A vertically oriented cylindrical annulus filled with NH 4 Cl‐H 2 O solution is cooled from the bottom and can be rotated about its axis at rates ranging up to 10.5 rad s −1 , corresponding to Ekman numbers down t…
On the generalized dimensions for the Fourier spectrum of the Thue-Morse sequence
We present explicit relations for the generalized dimensions of the spectral measure of the Thue-Morse symbolic sequence for positive integer values of q . Each is expressed through the eigenvalue of the corresponding matrix. It is also demonstrated how these dimensions can be recovered from the products of the values…
Fluorescent Transgenic Silkworm.
The replacement of fibroin heavy chain gene in silkworm by site directed homologous recombination was studied The DNA fragment consisting of an IE promoter driving green fluorescent protein (GFP) gene as reporter flanked by pieces of the 5' and 3' sequences of the fibroin heavy chain gene of silkworm at two sides was…
Synthesis and characterisation of thermoset-clay nanocomposites
Polymer-clay nanocomposites are materials reinforced on a molecular scale by 1 nm-thick clay layers dispersed in a polymer matrix. Thermoset-clay nanocomposites were synthesised from unsaturated po ...
Practical Concerns Regarding the Use of the Mooney-Rivlin Equation to Assess Degree of Crosslinking of Swollen Rubber Vulcanisates
The Mooney-Rivlin equation was used to determine the degree of crosslinking of rubbers based on their stress-strain behaviour. Non-linear behaviour ofthe Mooney-Rivlin curve under valid elongation and changes in the crosslink density for swollen NR vulcanisates were observed, in contrast to unswollen vulcanisates. The…
TOPOCHEMISTRY OF SiO2 WOOD-INORGANIC COMPOSITES FOR ENHANCING WATER-REPELLENCY
Methyltrimethoxysilane (MTMOS) was used to prepare the SiO2 wood-inorganic composites. To enhance the properties of these composites, 2-heptadecafluorooctylethyltrimethoxysilane (HFOETMOS) as a property enhancer was added to this reaction system for SiO2 wood-inorganic composites. To elucidate the mechanism for enhanc…
Potential Model Parameters for Molecular Dynamics Simulation of Alumina-Magnesia Systems.
Molecular dynamic simulations with quantum correction were performed on an alumina-magnesia system. First, interatomic potential parameters were determined empirically for alumina, magnesia and spinel so as to reproduce the lattice constants at 300K and higher temperatures. Then, the thermal expansivity, specific heat…
A perovskite ceramic of composition Ba0.92Ca0.08(Ti0.75Zr0.25)O3 with both ferroelectric and relaxor properties
Dielectric, pyroelectric current and X-ray diffraction studies have been performed on a ceramic of composition Ba0.92Ca0.08(Ti0.75Zr0.25)O3 belonging to the BaTiO3–BaZrO3–CaTiO3 ternary diagram. A spontaneous classical ferroelectric–relaxor transition was evidenced at T = 210 K. Such behaviour has been reported previo…
Synthesis and base-induced epimerization of cis,cis,cis,trans-tribenzo[5.5.5.6]fenestranes
Strained cis,cis,cis,trans-tribenzo[5.5.5.6]fenestranes are accessible in good yield by two-fold cyclodehydration of cis-2,6-diphenylspiro[cyclohexane-1,2′-indane]-1′,3′-diols and the particularly high acidity of their ‘inverted’ benzylic bridgehead C–H bonds, causing facile epimerization to the more stable all-cis-tr…
Voltage and temperature distribution along semiconducting glaze insulator strings
Voltage distribution along a semiconducting glaze insulator string was calculated based on an equivalent circuit. The impedance effect of the insulator unit on voltage and temperature distributions along the insulator string were also examined by calculation. The calculated results agreed well with experimental ones o…
Evidence of the smectic antiphase C˜ in 4-decyloxybiphenyl ester imide derivatives
The series of liquid crystalline 4-[(4′-decyloxybiphenyl-4-yl)oxycarbonyl]phthalimide alkane acid methyl esters has been synthesized and studied by DSC, polarized optical microscopy and X-ray diffraction methods. All compounds form a monolayer smectic A phase. It was found that 2-{4-[(4′-decyloxybiphenyl-4-yl)oxycarbo…