Materials Literature
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We study liquid crystal mixtures of alkoxy substituted phenylpyrimidines 2-[4-(butyloxy)phenyl]-5-(octyloxy)pyrimidine (2PhP) and 2-[4-(tetradecyloxy)phenyl]-5-(tetradecyloxy)pyrimidine (PhP14) using molecular dynamics simulations at the all atom level. The molecular length of PhP14 is 1.8 times that of 2PhP, resultin…
Abstract A phenomenon that can represent a great problem in melt processing is extrudate distortion. This effect can range in intensity from a loss of gloss to gross distortion and is the factor that limits the production rate in certain processes such as the blown film extrusion of linear low‐density polyethylene (LL…
Kern-Schale-Nanostrukturen eines photolumineszierenden Eu-Polyoxometallats (Eu-POM) mit dem doppelt-hydrophilen neutral-kationischen Blockcopolymer PEO114-b-PDMAEMA16 wurden durch elektrostatisch getriebene Selbstorganisation in wässriger Lösung hergestellt (siehe Schema; neutraler Block blau, kationischer Block rot).…
Abstract This work extends the method to follow in real time the reduction of the clay particle size by light extinction measurements (turbidity), obtained via an in‐line optical detector fitted at the extruder die exit, to monitor multiple extrusions of PP/MMT nanocomposites. The optical detector was calibrated and s…
A new finite element (FE) specific failure criterion utilizing hardening rates to quantify bending stress is implemented into the MAT_124 material model in the commercial software LS-DYNA to simulate fracture of extruded AZ31 and cast AM60 magnesium alloy tubes. The simulations are performed by requiring element erosi…
Porous platinum nanoparticles provide a route for the development of catalysts that use less platinum without sacrificing catalytic performance. Here, we examine porous platinum nanoparticles using a combination of in situ transmission electron microscopy and calculations based on a first-principles-parametrized therm…
Phase structure of monolayer graphene is studied on the basis of a U(1) gauge theory defined on the honeycomb lattice. Motivated by the strong coupling expansion of U(1) lattice gauge theory, we consider on-site and nearest-neighbor interactions between the fermions. When the on-site interaction is dominant, the subla…
Abstract The complexation of lanthanide cations with a tripodal ligand bearing terminal ester functions was investigated. Thermodynamic speciation was achieved by a combination of different physicochemical methods, and the stability constants of the related complexes were determined spectrophotometrically. The formati…
In order to describe the relation between the elasticity and the blended ratio of PLA fiber blended yarn, the elasticity of different kinds of blended ratio of PLA/Modal and PLA/cotton blended yarn was measured. The relation between the elasticity and the blended ratio of blended yarn is determined. The optimum blende…
A multiscale finite element (FE) methodology is applied to study failure behaviour of an intercalated epoxy-clay nanocomposite. A 2D FE model of the nanocomposite is built to capture nanocomposite morphology and gallery failure mechanism. Intercalated morphology is reconstructed using a random dispersion of clay tacto…
Folding of carbon nanotubes and graphene nanoribbons into a shape that looks like a tennis racket is considered. An elastic continuum model is utilized in two types of analysis. The first is called an “adhesion model,” in which the adjacent sides of the racket handle are assumed to be straight and bonded together with…
Abstract In this work, poly(ethylene oxide) (PEO) was added into polyoxymethylene (POM) as a new modifier, and the effects of the injection speed on the phase morphology, crystallization behavior, and the mechanical properties of the POM/PEO crystalline/crystalline blend were investigated. The results showed that with…
Silica fillers are well known to improve the mechanical properties of elastomers.Nevertheless, the silica filler particles tend to aggregate and affect the properties of the elastomer. In the present study, the silica filler was modified by silane coupling agent (A-151) in order to improve the dispersion of the filler…
To make full use of bamboo resources in China and explore the foaming mechanism of bamboo powder-polypropylene (PP) foamed composites, a foamed composite of 54 wt% PP and 13 wt% HMSPP containing 33 wt% bamboo powder blends was prepared by injection moulding. Effects of chemical foaming agents (CFA) on the mechanical p…
Several experimental studies have been conducted to determine the NO x reduction by a series of LNT (lean NO x trap) and SCR (selective catalytic reduction) catalytic bricks. An important goal is to minimize the required precious metal loading in the LNT while keeping the NO x emission below a specified level. We pres…
Recently, transition-metal-doped semiconductor nanostructures, so-called diluted magnetic semiconductors, such as dots, rods, wires, and films, have been the subject of intense research efforts due to their fascinating properties and potential applications in bioimaging, spintronics, and quantum interference informati…
Carbon nanotubes (CNTs) are frequently used as torsional devices in nanoelectromechanical systems; thus it is necessary to gain a thorough understanding of the mechanical behavior of tubes under torsion. In this paper, molecular dynamics simulations are carried out to investigate the torsional buckling of single-walle…
Abstract Low‐temperature catalytic dehydrogenation of H 3 Ga · NMe 3 and a bicyclic guanidine [1,3,4,6,7,8‐hexahydro‐2 H ‐pyrimido[1,2‐ a ]pyrimidine (hppH) or 1,5,7‐triazabicyclo[4.3.0]non‐6‐ene (Htbn)] led to temperature‐sensitive gallium hydrides H 3 Ga(tbn) · Htbn and [H 2 Ga(μ‐hpp)] 2 . Both hydrides, which are s…
A macroscopic system of single-walled carbon nanotubes (SWNTs) created by a novel DNA/protein complex-assisted assembly is investigated. Due to a point-like nature of connectors, the resulting SWNT aerogel represents a network of self-suspended nanotubes with a record-low density of less than 0.75 mg cm(-3). The assem…
Mullite-based glass-ceramics were produced from aluminium hydroxide sludge resulting from the anodisation process and waste glasses. Phase development for crystallisation of amorphous mullite was investigated between 900°C and 1200°C. The kinetic parameters such as activation energy of crystallisation and Avrami expon…