Materials Literature
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Pretilt angle effect on the dark-state light leakage and viewing angle of in-plane switching (IPS) liquid crystal display is investigated. As the liquid crystal (LC) pretilt angle increases, the light leakage becomes more severe and the off-axis light leakage from the out-of-plane LC directors cannot be neglected. Int…
Abstract A spherical TiCl 4 /MgCl 2 ‐based catalyst was used in the synthesis of polyethylene/polypropylene/poly (ethylene‐ co ‐propylene) in‐reactor alloys by sequential homopolymerization of ethylene, homopolymerization of propylene, and copolymerization of ethylene and propylene in gas‐phase. Different conditions i…
Abstract Highly delaminated dispersions of the organically modified clay I‐28 (Nanocor, Inc.) in liquid dicyclopentadiene (DCPD) were prepared. In situ ring‐opening metathesis polymerization of I‐28/DCPD nanodispersions generated I‐28/poly(DCPD) nanocomposites. When clay/DCPD dispersions were cured under shear, alignm…
Abstract Poly(3‐methlthiophene) films were prepared under “silent” and “sono‐electrochemical” potentiostatic (SEP) conditions. A three‐electrode one‐compartment sono‐cell was used with a working platinum disc electrode. The sono‐electrochemically formed polymer films were deposited with different working electrode‐to‐…
Abstract Planar bis(1,2‐dithiooxalato)nickelates(II) react in aqueous solutions of lanthanide ions to form pentanuclear, heterobimetallic complexes of the general composition [{Ln(H 2 O) n } 2 {Ni(dto) 2 } 3 ]·x H 2 O (Ln = Y 3+ , La 3+ −Lu 3+ ; n = 4 or 5; x = 9−12). With [{Ce(H 2 O) 5 } 2 {Ni(S 2 C 2 O 2 ) 2 } 3 ]·…
Low-efficiency solar cells for educational purposes can be simply made in school or home environments using wet-chemistry techniques and readily available chemicals of generally low toxicity. Instructions are given for making solar cells based on the heterojunctions Cu/Cu 2 O, Cu 2 O/ZnO and Cu 2 S/ZnO, together with…
Abstract Summary: A theoretical model describing aggregation of filler particles in amorphous elastomers is proposed. The model is based on a counting technique originally used in genome analysis to characterize the size and distribution of overlapping segments randomly placed on a DNA molecule. In the present model,…
The problem of degenerate ground states of open-shell atoms is investigated in spin-restricted and spin-unrestricted density functional theories using the exact-exchange energy functional. For the spin-unrestricted case, spurious energy splittings of the order of 2-3 kcal/mol are found for atoms of the second and thir…
A novel Cu(II)2 complex of the [18]ane-N6 macrocycle ([18]ane-N6 = 1,4,7,10,13,16-hexaazacyclooctadecane) was prepared from the reaction between [18]ane-N6 and Cu(II) salts such as Cu(NO3)2 and Cu(OAc)2. A structural study of the complex derived from Cu(OAc)2 (1) revealed a Cu(II)2 core encircled by a [18]ane-N6 ligan…
Abstract The effect of ultrasonic oscillations on the weld line strength of amorphous polystyrene (PS), polymethyl methacrylate (PMMA), and PS/PMMA (20/80, 50/50, 80/20) blends at various temperatures was investigated. By facilitating the molecular diffusion across the weld line, the introduction of ultrasonic oscilla…
Abstract We designed and developed novel cycloaliphatic liquid‐crystalline (LC) poly(ester amide)s to investigate the effects of nematic LC phases and hydrogen‐bonding interactions on the glass‐transition behavior. Three series of poly(ester amide)s based on commercially important poly(1,4‐cyclohexanedimethylene terep…
Abstract Organophilic montmorillonite intercalants were prepared by a cation‐exchange process between Na + ions of montmorillonite and ammonium salt of octadecylamine. Fourier transform infrared (FTIR) spectrometry and X‐ray diffraction analyses of the compounds were carried out. The layer spacings of both modified an…
Effects of charge-density fluctuations on a phase behavior of the restricted primitive model are studied within a field-theoretic formalism. We focus on a lambda line of continuous transitions between charge-ordered and charge-disordered phases that is observed in several mean-field theories, but is absent in simulati…
Abstract To identify the effect of reactive preparation on the structure and properties of rigid polyurethane (PU)‐layered silicate nanocomposite, a range of nanocomposites were prepared by combining the various precursors in different sequences. The morphology of the samples was characterized by XRD and TEM. Tensile…
Abstract The new magnesium based intermetallic compounds Nd 4 Co 2 Mg 3 and Sm 4 Co 2 Mg 3 were synthesized by induction melting of the elements in sealed tantalum tubes in a water‐cooled sample chamber. The compounds were studied by X‐ray powder and single crystal diffractometer data: P 2/ m , a = 765.42(14), b = 380…
Abstract Thermal properties of blends of poly(aryl ether ether ketone), PEEK, with a thermotropic liquid crystalline polymer, Vectra®, were investigated by differential scanning calorimetry and X‐ray diffraction techniques. Isothermal crystallization experiments were performed over a wide range of crystallization temp…
This paper proposes a shunt electromagnetic filter to attenuate zero-sequence harmonic injection into three-phase star-grounded supplies. The device is built on the basis of zigzag windings and a three-leg core-type magnetic arrangement. Physical considerations as well as mathematical modeling and computer implementat…
Poly(acrylate) was derivatized with Rh III (pc) (pc = phthalocyanine) and the morphology of the strands was established by AFM microscopy. The strands of the polymer, poly-Rh III (pc), were seen as the strings of spherules expected for an hypercoiled poly(acrylate) backbone. Phthalocyanine pendants in a polymer, poly-…
Abstract A polystyrene‐ b ‐poly(2‐vinylpyridine) block copolymer containing a methylhydridosilane linking group was chemically grafted to an 8‐trichlorosilyloctene monolayer via a simple one‐step hydrosilylation reaction. The resulting Y‐shaped thin film exhibited a low grafting density, which was characteristic of th…
Abstract Summary: The crystallinity of a glycolysate obtained by glycolysis of PET with diethylene glycol (DEG) was qualitatively studied by optical microscopy using a polarizer and quantitatively by X‐ray diffraction. Moreover, the rheological behavior of this glycolysate was also studied in relation with its crystal…