Materials Literature
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The reaction of Cr(Bztacn)(CN)3 (Bztacn is 1,4,7-trisbenzyl-1,4,7-triazacyclononane) with Ni(iPrtacn)Cl2 (iPrtacn is 1,4,7-trisisopropyl-1,4,7-triazacyclononane) affords a CrNi3 tetranuclear complex. Variable temperature and magnetization versus field measurements show a S = 9/2 ground state and an appreciable magneti…
We investigated the effect of plasma treatment on single-walled carbon nanotube (SWCNT) field emitters, which were fabricated by printing a photoimageable SWCNT paste, to improve emission lifetime. The treatment was performed by applying a dc pulsed voltage between two electrodes, where the cathode was the SWCNT emitt…
Abstract A reactive compatibilizer, mercapto‐functionalized EVA (EVASH), in combination with styrene‐butadiene block copolymer (SBS), was used to compatibilize the blends of polystyrene (PS) and ethylene–vinyl acetate copolymer (EVA). The reactive compatibilization was confirmed by the presence of insoluble material a…
This paper presents a combined numerical and analytical investigation into various problems involving two symmetric interacting constant-pressure bubbles evolving in two-dimensional Stokes flow. The bubbles have constant surface tension on their boundaries and are taken to be in an ambient straining flow. First, a nov…
Abstract For Abstract see ChemInform Abstract in Full Text.
Ein Herz aus Gold: Ein Vergleich photoelektronenspektroskopischer Ergebnisse mit denen von Rechnungen deckte die Struktur des Au32−-Clusters auf. Zwar legten DFT-Rechnungen eine hochsymmetrische leere Käfigstruktur (Ih, links) als Energieminimum bei 0 K nahe, das berechnete Spektrum für einen wenig symmetrischen, verz…
Abstract Natural rubber (NR) was blended with chlorosulfonated polyethylene (CSM) with various formulation and blend ratios (NR/CSM: 80/20 –20/80, wt/wt). Rubber blends were prepared by using a two‐roll mill and vulcanized in a compression mold to obtain the 2 mm‐thick sheets. Tensile properties, tear resistance, ther…
Abstract A kind of novel polyether polyurethane (PU)/clay nanocomposite was synthesized using poly(tetramethylene glycol), 4,4′‐diphenylmethane diisocyanate (MDI), 1,6‐hexamethylenediamine, and modified Na + ‐montmorillonite (MMT). Here, organicly modified MMT (O‐MMT) was formed by applying 1,6‐hexamethylenediamine as…
Microcrystalline powders of spirooxazine and spiropyran compounds do not show photocoloration under steady-state illumination, whereas they undergo photochromism on intense femtosecond laser-pulse excitation. We investigated the characteristic mechanism of the crystalline photochromism by studying the photocoloration…
Abstract This article reports the results of a study comparing commercially available high‐cis polybutadiene rubbers (BRs) proceeding from different production technologies and bearing distinct structural characteristics. The microstructure of these polymers was characterized by Fourier transform infrared spectroscopy…
Understanding the interfacial interactions between the nanofiller and polymer matrix is important to improve the design and manufacture of polymer nanocomposites. This paper reports a molecular dynamic study on the interfacial interactions and structure of a clay-based polyurethane intercalated nanocomposite. The resu…
The dynamics of oxygen motion in ZrW(2)O(8) have been characterized using (17)O solid-state NMR. Rates of dynamic exchange have been extracted from magnetization transfer experiments over a temperature range of 40 to 226 degrees C, and distinct values for the associated activation barrier have been observed on either…
We investigate the phase behavior and 3D structure of strongly attractive mixtures of silica microspheres and polystyrene nanoparticles. These binary mixtures are electrostatically tuned to promote a repulsion between like-charged (microsphere-microsphere and nanoparticle-nanoparticle) species and a strong attraction…
[Reaction: see text]. The novel synthetic strategy and optical properties of highly fluorescent, triazine-amine conjugated oligomers are described herein. Under basic conditions, aromatic dinitrile compounds, NC-C6H4-X-C6H4-CN (X = NMe, O, CH2), underwent cyclic trimerization of the cyano groups at both ends to give a…
Abstract Single crystals of the title compound have been obtained by reaction of Gd 3 (ClH 2 CCOO) 9 (H 2 O) 5 with 2,2′‐bipyridyl (bipy) in a solution of ethanol and water. Gd 2 (ClH 2 CCOO) 6 (bipy) 2 crystallises in the triclinic space group P $\bar {1}$ ( Z = 2) with a = 959.5(3) pm, b = 980.9(3) pm, c = 1163.9(4)…
Polyaniline (PANI) nanofibres or nanotubes (180–200 nm in diameter) containing Fe 3 O 4 nanoparticles (diameter ≈10 nm) and PANI-coated γ - Fe 2 O 3 nanoneedles (40–80 nm in diameter and 500–600 nm in length) were prepared by in situ doping polymerization in the presence of H 3 PO 4 as a dopant. The composite nanostru…
Abstract Our main objective of this study was to study the parameters affecting the free‐radical melt grafting of maleic anhydride (MA) onto linear low‐density polyethylene (LLDPE) with dicumyl peroxide (DCP) in an internal mixer. The degree of grafting (DG) was measured with titrometry and Fourier transform infrared…
A simple fabrication route combining large-area nanoscale-patterning methods with gaseous sulfidation is used to generate well-ordered, highly crystalline arrays of MoS2 nanostructures. Independent control over the dimensions of the patterned nanostructures can be achieved. Preferential orientation of MoS2 nanocrystal…
Abstract Core–shell acrylate latices containing fluorine in the shell were prepared by semicontinuous emulsion polymerization. The chemical components of the latices were determined by Fourier transform infrared, ion‐selective electrode analysis, and differential scanning calorimetry. The average size and morphology o…
Nanoparticle nitriding: Boron nitride nanocages (see Figure) of less than 80 nm are synthesized in large amounts by a moderate chemical route simply by nitriding Fe–B nanoparticles under mild conditions. The synthesis is performed at only 750 °C, and the product shows rather promising solid-state lubricating propertie…