Materials Literature
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The interaction of the graphite strike plate material in ITER, with a divertor plasma containing beryllium, is simulated experimentally in PISCES-B. Graphite targets are exposed at 600 K to deuterium plasmas with fixed beryllium fractions ( ) in the range 0.0003 ⩽ f Be ⩽ 0.011. From the onset of beryllium injection, t…
Silicon nanorods 20nm in diameter are fabricated by reactive ion etch (RIE) to study anisotropy and damage profile in decananometer scale. RIE of gas mixture of SF6∕O2 and SF6∕CHF3 is tuned to achieve high anisotropy. The gas specie of SF6∕O2 can reach 90% anisotropy, 84° taper angle, and 10:1 selectivity when SiO2 is…
Abstract A new type of polyimide/silica (PI/SiO 2 ) hybrid composite films was prepared by blending polymer‐modified colloidal silica with the semiflexible polyimide. Polyimide was solution‐imidized at higher temperature than the glass transition temperature ( T g ) using 3,3′,4,4′‐biphenyltetracarboxylic dianhydride…
The effective pair potentials between different kinds of dendrimers in solution can be well approximated by appropriate Gaussian functions. We find that in binary dendrimer mixtures the range and strength of the effective interactions depend strongly upon the specific dendrimer architecture. We consider two different…
In this article, based on electronic structure calculations, the conditions are discussed under which a genuine half-metallic interface between a heusler C1 b half-metal and a semiconductor can exist. An explanation is given why for the III–V semiconductors the double anion terminated (111) interface is the only possi…
The nonlinear rheology of styrene-butadiene rubber filled with carbon-black or silica particles is investigated by complementary viscosimetric devices on a wide range of deformation and deformation rates. The effect of filler volume fraction on the rheological behavior is systematically studied. The importance of a cr…
Two oxo-bis(benzene-1,2-dithiolato)chromate(V) complexes, namely, [CrO(L(Bu))2]1- and [CrO(L(Me))2]1-, have been synthesized and studied by UV-vis, EPR, magnetic circular dichroism (MCD), and X-ray absorption spectroscopy and by X-ray crystallography; their electro- and magnetochemistries are reported. H2L(Bu) represe…
Abstract To understand the effect of extension of molecular chain in amorphous region in polymer fibers to thermal conductivity, the thermal conductivity, tensile modulus and crystal orientation angle of ramie fibers and those drawn by the stress of 17.4 kg/mm 2 (water treatment) in the water were investigated. The te…
Abstract The hydrosilylation reaction of α,ω‐bis(trimethylsiloxy)methylhydridesiloxane to phenylacetylene in the presence of catalyst—platinum hydrochloric acid (0.1 M solution in tetrahydrofuran)—at 1 : 35 ratio of initial compounds, at various temperatures (40–60°C) was investigated and methylsiloxane oligomers with…
Abstract A negative‐type photosensitive polyamic acid (PAA) was synthesized from cyclobutane‐1,2,3,4‐tetracarboxylic dianhydride and 2‐(methacryloyloxy)ethyl 3,5‐diaminobenzoate in N ‐methyl‐2‐pyrrolidinone. Glycidyl methacrylate was added into the PAA solution to yield a photosensitive PAA ester (PAE) by the ring‐ope…
Plasma-based ion implantation (PBII) allows the formation of diamond-like carbon (DLC) films with excellent tribological properties. A large number of examples from the literature are discussed in detail, and the process parameters of PBII, such as plasma-forming gas, bias voltage, pulse length, pulse repetition rate…
Partielle Protonierung eines Silicodecawolframats vom Keggin-Typ mit zwei Leerstellen in einem wasserfreien organischen Solvens bewirkte eine dehydratisierende Kondensation und die Bildung eines neuartigen S-förmigen Disilicoicosawolframats (siehe Bild). Der S-förmige Cluster vermittelt die Baeyer-Villiger-Oxidation v…
Abstract The curing reaction between the diepoxy and dicyanate mixed resins in the presence of three different catalysts Cu(AcAc) 2 , manganese octoate, and copper octoate was investigated. The thermal behavior was monitored using differential scanning calorimeter; the transformations of structures during the isotherm…
Polypyrrole films were electrodeposited at pure aluminium from aqueous solution of sodium sulphate containing pyrrole and organic compounds as dopants. Substrate-adherent polypyrrole films were obtained by electrochemical oxidation of pyrrole using the potentiodynamic method and cycling the electrode potential from 50…
Abstract A structure of a new inclusion compound of bis-thiourea pyridinium nitrate salt C 5 H 6 N + NO 3 - 2[CH 4 N 2 S] was determined by single-crystal X-ray diffraction method at 293 K, 250 K and 150 K. In high temperature phase the compound crystallizes in orthorhombic system, the two low-temperature phases are m…
The effect of Ru crystal orientation on the deposition behavior of chemical vapor deposition (CVD) Cu was investigated. The crystal orientation of Ru films was modulated by adjusting sputtering temperature. Ru(001) and random orientation films were obtained by sputtering at 300 °C and room temperature, respectively. C…
Abstract This paper reports synthesis and characterization of polyurethane–urea (PU‐urea) and the nanocomposites derived from the PU‐urea with silicate clays. Organophilic montmorillonite cotreated by cetyl trimethyl ammonium bromide (CTAB) was synthesized and used to prepare PU‐urea/montmorillonite nanocomposites coa…
Accurate first principles calculations were performed to predict the optical and magneto-optical properties of a large set of Heusler compounds. The optical properties are explained in terms of relevant transitions from the underlying band-structure, suggesting that the joint density of states plays a role in shaping…
Abstract The morphologies of a ternary blend of nylon 66 and polystyrene in a polypropylene matrix with and without compatibilization by an ionomer resin (for nylon 66) and a styrene‐ block ‐ethylene‐ co ‐butylene‐ block ‐styrene (SEBS) copolymer (for polystyrene) were investigated by transmission electron microscopy…
Abstract Poly(4‐methyl‐1‐pentene) (PMP) hollow fibers were prepared and fabricated into gas separation or microporous membranes by the melt‐spun and cold‐stretched method. PMP resin was melt‐extruded into hollow fibers with cold air as the cooling medium. The effects of take‐up speed and thermotreatment on the mechani…