Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTNanoblends of Incompatible Polymers by Direct Space-Confined PolymerizationShu-Hua Chan, Yi-Yang Lin, and Ching TingView Author Information Union Chemical Laboratories, Industrial Technology Research Institute, 321 Kuang-Fu Road, Se…
Measurement of cation selectivity in soils provides important information about the affinity and binding strength of a particular cation on soil surfaces. Gaines‐Thomas ( K GT ) selectivity coefficients were determined for a variety of K/Ca and K/Pb ratios on an Oxisol and Ultisol soil from Puerto Rico. The calculated…
Abstract Aramid (kevlar‐49) fibers were surface treated by two different methods to induce roughness and then used to produce unidirectional nylon 66 based composites. The transcrystallinity generated around the treated fibers was characterized by SEM and polarized light microscopy and compared with the regular transc…
Quantum-chemical open-shell method with parametrization INDO is used to construct the model of a large unit cell for the [Si- V ] 0 impurity complex in diamond. It is shown that the ground spin-triplet state of the complex exerts tunnel (rather than Jahn-Teller) splitting associated with off-center shift of Si atom al…
The chemical grafting of alkanethiol-terminated poly(ethylene glycol) to a gold substrate from dimethylformamide solution was monitored by in situ ellipsometry for several molar concentrations. In the initial stage a layer of mushroom-like moieties forms and, on a much longer time scale, is followed by conformational…
Optical functions of cobalt phthalocyanine, nickel phthalocyanine (NiPc), and iron phthalocyanine (FePc) have been determined by use of spectroscopic ellipsometry in the spectral range 1.55-4.1 eV (300-800 nm). The samples were prepared by evaporation onto glass and silicon substrates. The optical functions were deter…
Plasma enhanced chemical vapor deposition, which enables growth of carbon nanotubes directly onto substrates, is potentially suitable for preparing carbon nanotubes as electron sources in field emission displays. In this article, we report the growth of aligned carbon nanotubes by microwave plasma enhanced chemical va…
Abstract The polymerization of metal salts of N ‐chloroacetyl‐ β ‐alanine and N ‐chloroacetyl‐4‐aminobutyric acid was investigated. The former gives a mixture of polymer and a seven‐membered cyclic compound constituted of glycolic and β ‐alanine units, and its reaction proceeds in the solid state. However, liquefactio…
Abstract Due to a nanotechnology boom in science and technology, the metal nanoclusters or nanoparticles stabilized by polymers and organic ligands have achieved much attention recently all over the world. We have studied on the preparation of polymer‐stabilized metal nanoclusters by chemical methods, and applied them…
Abstract The formation of inclusion complexes of well‐known 1,4‐dihydropyridine calcium antagonists, such as nifedipine (NF) and nicardipine (NC), with β‐cyclodextrin (βCD) was investigated by differential pulse polarography (DPP) and UV‐vis spectrophotometry. The equimolar variation method indicated the formation of…
We present a method for synthesizing insulator-coated carbon nanotubes by pulsed laser deposition. Isolated multi-walled carbon nanotubes (MWNTs) were coated with an SiO x thin layer in a multishell form. The product showed that a stoichiometric SiO 2 thin layer was uniformly wrapped around a MWNT, and reflected the s…
Substantial amounts of self-boiling, Al-rich, hyperalkaline, and saline high-level waste fluids (HLWF) were deposited to the vadose zone at the Hanford Site, in Washington State. The objective of this study was to investigate the effects of similar fluids on the extent of dissolution and precipitation in the sediments…
The effect of yarn hairiness on energy consumption when rotating a ring-spun yarn package is investigated theoretically and experimentally. A theoretical model is developed to calculate the energy required to rotate hair fibers, based on hair length and number as well as package speed and size. A single spindle test r…
A 2 cm long and 0.8 cm thick, single graphite crystal embedded in quartz, feldspar, and orthopyroxene of a granulite-facies metamorphic rock from southern India exhibits unique homogeneity in δ 13 C values along layers parallel to the (0001) surface and smooth unidirectional variation of about 1‰ along the c-crystallo…
Abstract N ‐(2‐Hydroxypropyl)methacrylamide (HPMA) copolymer‐linked nitroxides were synthesized as macromolecular contrast agents for MR imaging. Molar relaxivities of HPMA copolymer‐linked nitroxides increased linearly in proportion to the number of nitroxides attached per gram of copolymer. HPMA copolymer‐linked nit…
We propose a new magnetic force control device, composed of a giant magnetostrictive material (Terfenol-D) and a piezoelectric material (PZT), for coilless magnetic force control. The device uses the inverse magnetostrictive effect, whereby the variation of magnetization of a Terfenol-D rod controlled by PZT is conver…
Abstract Acrylonitrile-butadiene-styrene terpolymer (ABS) is one of the engineering plastics most frequently used as outer casings for computer equipment such as monitors, keyboards and other similar components. In an attempt to recycle, blends of scrap computer plastics (SCP) based on ABS with nitrile rubber (NBR) we…
This paper reports an analysis of the influence of polyester and yarn type on the abrasion resistance of 50/50 wool/polyester blended woven fabrics. Recently developed polyester fibers put into the blend and two-strand Sirospun yams are compared with 2.5 denier standard polyester and two-fold ring yarns. Mass losses o…
Abstract A large distribution coefficient and large sorption capacity were observed during selenate adsorption by cation (Fe3+, Cu2+, and H+)-anchored diamino-functionalized MCM-41. Moreover, these synthetic adsorption media showed excellent selectivity for selenate sorption in the presence of other anions. In a pure…
The mechanical, structural, and dyeing properties of solvent-spun lyocell fibers in a plain weave fabric are studied before and after industrial treatments of mechanical fibrillation and enzymatic defibrillation. Stress-strain relationships, surface morphology, crystallinity, and dye uptake are assessed for each of th…