Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
This article studies the perforation of mild steel square and rectangular plates struck normally by cylindrical projectiles having blunt, hemispherical, and conical impact faces. Experimental results are obtained in a drop hammer rig for the perforation of 4mm and 8mm thick plates struck by relatively heavy projectile…
Abstract Chitosan–clay biocomposites have been prepared in which KSF‐montmorillonite (KSF) is used as filler and diluted acetic acid is used as solvent for dissolving and dispersing chitosan and montmorillonite, respectively. The effect of KSF loadings in biocomposites has been investigated. The characterization with…
Semiconductor nanocrystals have been extensively studied due to their size-dependent optical properties and wide applications.1,2Many efforts have been made to develop nano particles with superior optical characteristics, e.g., higher quantum yields, more accessible absorption wavelengths, and wider absorption and nar…
The magnetic and dielectric properties of InFe2O4, InFeCuO4, and InGaCuO4 have been investigated. All these materials are isostructural with RFe2O4 (R = Y, Ho-Lu), which shows ferroelectricity due to iron-valence ordering. InFe2O4 exhibits ferrimagnetic ordering at T(C) approximately 242 K and a dielectric constant (e…
Abstract Mode‐I fracture toughness of rigid polyurethane (PUR) foam modified with nanosize particles of different shapes and sizes have been examined using a single edge notched bend (SENB) specimen under three‐point bending configuration. The PUR foams with density of 260 kg/m 3 and four different types of nanopartic…
We report on an scanning tunneling microscopy study of the nanocrystallite phases of TiO(2) formed via reactive-layer-assisted deposition in ultrahigh vacuum. The synthesis used reaction of a thin layer of water, on a Au(111) substrate at 130 K, with low-coverage vapor-deposited Ti. The effects of annealing temperatur…
Abstract This article studies the perforation of mild steel circular plates struck normally by cylindrical projectiles having blunt, hemispherical, and conical impact faces. Experimental results are obtained using a drop hammer rig for the perforation of 2–8mm thick plates struck by projectiles weighing between 1.75kg…
A novel short-chain (S)-1-phenyl-1,2-ethanediol dehydrogenase (SCR) from Candida parapsilosis exhibits coenzyme specificity for NADPH over NADH. It catalyzes an anti-Prelog type reaction to reduce 2-hydroxyacetophenone into (S)-1-phenyl-1,2-ethanediol. The coding gene was overexpressed in Escherichia coli and the puri…
Abstract In this article, polypropylene composites filled with magnesium hydroxide (PP filled with MH) were prepared in corotating twin‐screw extruder. The effects of MH particles content and types of treatment agents on the crystallization and melting behaviors, crystal structure, and rheological properties of PP/MH…
Abstract The dynamic mechanical properties of sisal fiber reinforced polyester composites fabricated by resin transfer molding (RTM) were investigated as a function of fiber content, frequency, and temperature. Investigation proved that at all temperature range the storage modulus ( E ′) value is maximum for the compo…
The objective of the study is to develop thermodynamics based approach, which explains several nonequilibrium phenomena in metals at extreme loading rates. It is a microscale analysis in which mobile defects such as dislocations enable the redistribution of energy within the stressed metal. The redistribution promotes…
Abstract A polydimethylsiloxane‐α,ω‐diol with molar mass M n = 43,000 has been synthesized by cationic polymerization of octamethylcyclotetrasiloxane and reinforced with silica. Two pathways were used for incorporation of silica in the polymeric matrix: ex situ by mechanical blending of a pretreated fumed silica and i…
Recently, inorganic nanoparticles have attracted great attention because nanoparticles exhibit interesting size dependent physical and chemical properties due to inter mediate size between single molecules and bulk materials.1-5Especially, the design and preparation of functional nano materials obtained from tunable a…
Pt nanoparticles (NPs), synthesized via the reduction of H 2 PtCl 6 by formic acid at 80 °C, formed a nanoporous froth at the upper surface of the aqueous solution in which they were produced. The NPs, brought to the surface by the escape of CO 2 bubbles produced by the reduction, partly coalesced to form a froth film…
Effects of dimensionality on magnetic and electric properties of one- and two-dimensional GeMn systems and the role of defects in magnetic ordering are investigated by means of electron spin resonance (ESR) and superconducting quantum interference device magnetometry techniques. Arrays of ${\text{Ge}}_{1\ensuremath{-}…
Abstract This work is focused on the glassy dynamics of polymers under conditions of one‐dimensional confinement (in thin films). Several important topics are addressed: (a) preparative factors with large impact on the molecular dynamics of thin polymer films (oxidative degradation, plasticizing effects, residual stre…
Ein außergewöhnlich nützlicher Cluster, um Reaktionswege in Wasser genau zu beschreiben, könnte in [N(CH3)4]10[Ti12Nb6O44], einem Polyoxometallat mit zentralem Hohlraum, vorliegen. Die Verbindung ist in mehreren Lösungsmitteln löslich und wurde durch ESI-Massenspektrometrie sowie röntgenographisch charakterisiert (sie…
Abstract This work was done with the aim to solve an important environmental issue regarding poly (ethylene terephthalate), (PET) wastes. Samples of recycled PET (r‐PET) were reinforced with 10 to 30 wt% modified short glass fibers (SGF) through a melt mixing process in an internal mixer and their performance were ass…
Nachwuchs in der Porphyrin-Familie: Porphyrin(1.0.1.0) (Norcorrol, in der Bildmitte gezeigt) wurde unerwartet bei der spontanen oxidativen Makrocyclisierung des Iodidoeisenkomplexes des offenkettig-tetrapyrrolischen 2,2′-Bidipyrrin-Liganden erhalten. Es füllt eine Lücke in der Reihe der kontrahierten Porphyrinvariante…
We demonstrate that metamaterials formed by split ring resonators may exhibit strong spatial dispersion when the effective permeability is near zero. It is shown that the nonlocal effects can be characterized using a generalized Clausius-Mossotti formula. The proposed theory is verified using full wave simulations.