Materials Literature
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Abstract In the absence of polymerization, soy‐based polyols tend to have inadequate hydroxyl equivalent molecular weights for many critical urethane applications. In this article, the polymerization (bodying) of soybean oil is presented as an effective method to increase the molecular weight of soy‐based polyols. Whe…
Abstract Nylon 66/clay nanocomposites were prepared in a Berstorff ZE25A UTX Ultra‐glide corotating twin screw extruder at 270°C. Two types of extruder configurations with different mixing sections were used. One comprised two kneading block sections in the screws (KB only) and the other had a combination of a multi‐p…
Abstract In this study, we presented a convenient, in situ polymerization route for the preparation of Poly (butylene terephthalate) (PBT)/silica nanocomposites, in which silica was not premodified. The nanocomposites were synthesized by in situ polymerization of terephthalic acid (TPA), 1,4‐butanediol (BD) and silica…
This work reports the effect of NdF3, DyF3, and CaF2 additions on the electrical resistivity and magnetic properties of Pr–Fe–B hot-pressed and die-upset permanent magnets. Composite magnets were synthesized from ground Pr14.5Fe79.5B6 melt-spun ribbons blended with 5wt% of fluoride fine powders and consolidated by hot…
The first crystal structures of lipases that have been covalently modified through site-selective inhibition by different organometallic phosphonate-pincer-metal complexes are described. Two ECE-pincer-type d(8)-metal complexes, that is, platinum (1) or palladium (2) with phosphonate esters (ECE = [(EtO)-(O=)P(-O-C(6)…
This paper presents a fast iterative algorithm for passivity enforcement of large nonpassive macromodels that share a common set of poles. It is ensured that the maximum passivity violation is monotonically decreasing in each iteration step, and convergence to a passive macromodel is guaranteed.
Magnetic and structural transitions in the Ni50Mn50−xSnx (x=10–25) ferromagnetic shape memory alloys are currently of interest. As in Ni–Mn–Ga, these alloys feature high-temperature austenite and low-temperature martensite phases, where the magnetic state is strongly composition dependent. To study the role of chemica…
In this study, the Ti–6Al–4V alloy was diffusion bonded to austenitic stainless steel at temperatures of 820, 885, 930 and 980°C, under a pressure of 5 MPa for 30 min. The effect of temperature on interface formations and microstructure was investigated using a scanning electron microscope (SEM), energy dispersive spe…
We have studied the thickness dependence of the magnetic and transport properties of thin EuO films in the range of 10–60 Å. The ferromagnetic phase transition shows a systematic dependence of the critical temperature Tc with decreasing EuO film thickness. This behavior has been attributed to the interface layers whic…
This article evaluates the use of bagasse flour — a waste generated by sugarcane refinery—as a filler in the PVC matrix. The aim of the study is to develop a value-added product from the sugar mills. For this purpose, bagasse powder was obtained after grinding the dried waste from sugar mills having particle sizes of…
We studied the surface structure of ${\mathrm{La}}_{5/8}{\mathrm{Ca}}_{3/8}{\mathrm{MnO}}_{3}(001)$ thin films using in situ scanning tunneling microscopy (STM). Atomically resolved STM images reveal that a $(\sqrt{2}\ifmmode\times\else\texttimes\fi{}\sqrt{2})R{45}^{\ifmmode^\circ\else\textdegree\fi{}}$ reconstructed…
Abstract In this investigation, the surface modification of poly vinylidene fluoride (PVDF) and poly methyl methacrylate (PMMA) film induced by air plasma has been investigated using contact angle measurement, electron spectroscopy for chemical analysis (ESCA), and ATR‐FTIR spectroscopy. Plasma treatment affects the p…
The zeta-potential of PSS/PAH and PSS/PDADMAC coated silica particles was studied in the presence of ClO4(-) and H2PO4(-) salts. In the presence of ClO4(-), layer-by-layer (LbL) coated silica particles with PDADMAC as the top layer show a reversal in the surface charge with increasing salt concentration but remain pos…
Abstract Phaeodactylum tricornutum is a pleiomorphic diatom that exists in three different forms depending on environmental conditions, viz. oval, fusiform or triradiate. In spite of numerous observations of the three morphotypes, very little information is available about the process of transformation. In this review…
Metallic glasses are characterized by a rather complex viscoelastic response and the occurrence of the glass transition, while the atomistic origins are still poorly understood. Using a realistic CuTi model glass we employ global and local elasticity tensors for a thorough analysis of relaxation kinetics and mechanica…
In the present research, tungsten oxide nanorod bundles were synthesized by a unique plasma arc gas condensation method that was both noncatalytic and template-free. W 18 O 49 nanorod bundles were prepared by directly evaporating tungsten bulk in an oxygen-deficient environment. The as-prepared tungsten oxide nanorod…
Using molecular simulations the interaction between a noncharged nanoparticle and an ideal liquid-liquid interface is studied. The free energy profile as function of nanoparticle-interface separation is determined using Wang-Landau sampling. Comparison between the simulation results and macroscopic theories shows that…
Ramie (Boehmeria nivea) is one of the strongest natural cellulose fibers. Optimizing abundant resources ramie as a candidate materials used for reinforcing in polymeric composite material is a must to obtained high-performance natural fibers reinforced polymer especially for bulletproof panel or high-impact flexibilit…
High-throughput screening of catalysts could dramatically improve performance and reduce costs in the discovery and study of various catalysts. Here we report a cataluminescence-based array imaging as a high-throughput screening technique in the combinatorial discovery of active catalysts for CO oxidation. This strate…
Three hydrolytically stable polyethyleneglycol (PEG)-based N-substituted acrylamide macromonomers, methoxypolyethyleneglycol (350) acrylamide (MPEG350Am) methoxypolyethyleneglycol (750) acrylamide(MPEG750Am) and methoxypolyethyleneglycol (2000)acrylamide (MPEG2000Am) with increasing PEG chain length were synthesized.…