Materials Literature
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Mechanical properties of composites are a direct function of the interface bonding between strengthening fiber and the matrix. This study investigates the influence of surface modification of wood chips and presence of different interface coupling agents on the interface bonding of wood-polyethylene composites. Single…
Abstract Otavite-calcite solid solutions have been synthesized to investigate the factors which control the patterns of compositional zoning. The equilibrium partitioning of otavite between the aqueous and the solid phase can be described by means of a function X CdCO 3 ( X Cd,aq ) eq , which relates the solid mole fr…
A new type of functionalized discotic oligomer system has been realized whose molecular architecture consists of a trisubstituted benzene as central core and three nitro-functionalized triphenylenes as regional cores. These regional cores are linked to the central core via ether linkages through an alkyl chain spacer.…
The transient deformation of a viscous drop attached to a plane wall and subjected to an overpassing simple shear flow is studied in the limit of a vanishing Reynolds number. The buoyancy force is negligible, the contact line has and retains a prescribed circular shape, and the interface is either devoid of surfactant…
For eddy current detection of deep-lying flaws in large aircraft wheels, an automated airplane wheel inspection system using a HTS SQUID gradiometer sensor is being developed. Wheel drums made of aluminum alloys have to be tested frequently since they are subject to enormous dynamic loads and very high braking tempera…
The glass transition and the structural relaxation processes of blends of polystyrene and poly(2,6-dimethyl-1,4-phenylene oxide) have been studied by differential scanning calorimetry. The experimental results were compared with the prediction of a model based on the calculation of the configurational entropy of the s…
A new bis(ether-carboxylic acid), 9,9-bis[4-(4-carboxyphenoxy)phenyl]fluorene (3), was synthesized from the nucleophilic fluorodisplacement of p-fluorobenzonitrile with the dipotassium bisphenolate of 9,9-bis(4-hydroxyphenyl)fluorene, followed by alkaline hydrolysis of the intermediate bis(ether nitrile). A novel seri…
In recent years, a number of new models for the power diode have been proposed. The objectives of this paper are to provide the power electronics community with a comprehensive review and summary of recent power diode models. The models have been categorized systematically according to their modeling concepts with obj…
Phase separation kinetics and morphology of binary polymer mixtures (A/B) in the presence of photochemical reactions were investigated by using phase-contrast optical microscopy combined with digital image analysis. The polymers were chemically designed in such a way that two types of chemical reactions, intermolecula…
Time- and wavelength-resolved observation of a laser ablation plume from a strontium titanate target was performed under a dipole magnetic field applied from the substrate side. In contrast to the conventional method, the present method gave rise to increasing ionization of the growth species in the plume in the vicin…
Growth of Sr 2 Nb 2 O 7 particle size in KCl melts occurs by reaction on insoluble Nb 2 O 5 particles in the melt. Thus, Sr 2 Nb 2 O 7 size is controlled by the initial size of the reactants. By altering the reactant composition to include larger Nb‐rich reactants such as SrNb 2 O 6 , 5‐30 µm, anisotropic Sr 2 Nb 2 O…
Conversion of various epoxides to the corresponding thiiranes is achieved by thiourea in the presence of tin(IV) meso-tetraphenylporphyrin with excellent yields under non-aqueous conditions.
The maximum current density for HCOOH oxidation on deliberately stepped platinum surfaces with Pt(111) terraces of varying width and (110) monatomic steps decreases as the step density increases, or as the terrace width decreases. The maximum current densities on these surfaces are 1.6, 0.58, 0.46, and 0.39 mA cm−2 fo…
A new star structured regioregular poly(3-hexylthiophene) with a conjugated hyperbranched poly(triphenylamine) as the core has been shown to be electroactive and able to attain high levels of conduction up to 100 S/cm when doped. A hyperbranched poly(triphenylamine) was synthesized by a Negishi coupling reaction from…
We are primarily concerned with the variational problem with long-range interaction. This functional represents the Gibbs free energy of the microphase separation of diblock copolymer melts. The critical points of this variational problem can be regarded as the thermodynamic equilibrium state of the phase separation p…
We have investigated the microstructure related to the charge and orbital ordering in the manganites ${\mathrm{Pr}}_{0.5}{\mathrm{Ca}}_{0.5}{\mathrm{MnO}}_{3}$ by transmission electron microscopy. Electron diffraction clearly shows the presence of the incommensurate structure in the paramagnetic insulator phase of ${\…
By means of tight-binding molecular dynamics simulations we find that the ground-state atomic structure of a typical high-energy grain boundary in diamond is highiy disordered with a large fraction of sp 2 bonded atoms. This structure gives rise to localised bands within the band gap. We describe how multiphonon assis…
The rapid formation (and erasure) of a dynamic phase grating is one condition required of materials for dynamic holography. The photochemical nematic–isotropic transition of the side-chain polymer liquid crystal (PLC) shown in the Figure, caused by the trans–cis photoisomerization of the azobenzene moiety, is reported…
Laminates containing a thin layer (5 to 200 µm thick) sandwiched between two thick layers (2 mm thick) were fabricated by sequential slip casting in order to study crack bifurcation. The thin layer was formed with a mixture of a pure ZrO 2 powder (MZ) and a Zr(Y)O 2 powder containing 3 mol% Y 2 O 3 (TZ). The thick lay…
Two nonmacrocyclic ligands with pyridine and carboxamide nitrogens as donors readily form bis complexes of the type [FeIIIL2]+ in which the Fe(III) centers exhibit preference for coordination to carboxamido nitrogens over pyridine nitrogens. These Fe(III) complexes with deprotonated carboxamido nitrogens are very stab…