Materials Literature
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Hexakoordinierte ReV-Phthalocyaninate (pc) und ReV-Tetraphenylporphyrinate (tpp) vom Typ [Re(O)(X)p] (p: pc, tpp) mit X = OCH3, ReO4, Cl/pc, F/pc, OH/tpp, [{Re(O)p}2(μ-O)] und (cat)trans[Re(O)2p] (cat: nBu4N, Et4N/tpp) sind isoliert und durch UV-Vis-NIR-, IR- und Resonanz-Raman(RR)-Spektren charakterisiert worden. Bei…
Abstract Four commercially available main‐chain LCPs, Xydar and Zenite series, are characterized by FTIR spectroscopy, DSC, polarized light microscopy (PLM), TGA, TGAFTIR, and elemental analysis. The FTIR spectrum of Zenite 8000B is found to be more similar to that of Vectra A950 than those of the other three LCPs. Xy…
The paramagnetic resonance and optical spectra of Co2+ ions in SrLaAlO4 single crystals are reported. The EPR spectrum shows one electronic transition consisting of eight hyperfine lines with anisotropic g-factor and nearly isotropic hyperfine interaction constant. A tetragonal distortion of the octahedral crystal fie…
Abstract The compression molding process for manufacturing of all‐thermoplastic honeycomb core sandwich components is studied with the aim of verifying a previously proposed model describing the instantaneous face‐core bonding during molding. Experiments are performed with glass/polypropylene (PP) faces and PP honeyco…
The inhibition efficiency of the HEDP‐Zn2+ system, in a wider concentration range of Zn2+ and HEDP (10, 50, 100, 150, 200 and 300ppm), in controlling corrosion of mild steel immersed in low chloride medium (Cl‐ = 60ppm) has been evaluated by weight‐loss study. Synergism parameters have been calculated between HEDP and…
It is known from earlier work that the activation energies of dislocation glide and diffusion-controlled climb of semiconductors with diamond and zinc-blende structures are correlated. It is shown in the present work in a semiempirical approach that both energies are proportional to Phillips’ homopolar band gap. A sin…
The transverse Ising model is considered in the static fluctuation approximation. This hinges on the replacement of the local field operator with its mean value; only the quadratic fluctuations of the local field are retained. The model is applied to ferroelectrics of the order-disorder type, such as monoaxial crystal…
Experimental solubilities are reported at 25.0°C for diphenyl sulfone dissolved in 25 different organic nonelectrolyte solvents containing ether-, chloro-, hydroxy-, ester, methyl-, and tert-butyl-functional groups. Results of these measurements, combined with previously reported diphenyl sulfone solubilities taken fr…
The ReO3-type structure NbO2F, niobium dioxyfluoride, has been studied at high pressures using diamond anvil cells and synchrotron X-ray radiation. High-pressure powder diffraction measurements have been performed up to 40.1 GPa. A phase transition from the cubic (Pm3m) ambient pressure structure to a rhombohedral (R3…
The alkyd resin of short oil length with low acid value was modified with novolac‐based epoxy esters, prepared by using tobacco seed oil fatty acids. The prepared blends were cured using an aliphatic amine as curing agent. The films of cured resins were applied over various panels and their film characteristics were s…
Abstract Kaolinite hydroxyls in dimethylsulphoxide-intercalated (DMSO-intercalated) kaolinites have been determined using Raman spectroscopy at 298 and 77 K. The inner surface hydroxyl frequencies at 3650, 3670, 3684 and 3693 cm -1 move to higher wavenumbers upon cooling to 77 K and are observed at 3659, 3676, 3692 an…
The periodic tricontinuous network structure (TNS) of symmetric isoprene (I)–styrene (S)–2-vinylpyridine (P) triblock copolymers has been studied by small-angle X-ray scattering (SAXS). The observed SAXS profiles were compared with the calculated diffraction intensities based on the model electron density distribution…
Abstract Structure development in polybutylene terephthalate (PBT) and thermoplastic elastomers (TPEs) based on PBT during the melt spinning process was investigated. Melt spun filaments were examined using wide angle X‐ray diffraction and birefringence. Crystalline orientation was characterized in terms of Hermans‐St…
The coupling of a water-based electrochemical cell and fuel cell are discussed as a means to \nform a refrigeration cycle. In the proposed configuration, the process fluids can be passively \ndriven through the flow circuits. The cycle requires low direct current voltages for driving the \ncycle. Current d…
Small-angle X-ray scattering (SAXS), which determines the radius of gyration, Rg, and the pair distance distribution function, was used to investigate the conformational changes of calmodulin (CaM) on binding to an antagonist, trifluoperazine (TFP), with or without Ca2+ in solution. We previously applied this SAXS met…
Four new apatitic phases were prepared and their structures determined. The structure of Ca 10 (PO 4 ) 6 S was refined from single crystal X-ray data and the structures of Sr 10 (PO 4 ) 6 S, Ba 10 (PO 4 ) 6 S and Ca 10 (PO 4 ) 6 Se from powder X-ray data using the Rietveld method. The four apatites are isostructural a…
The physical properties of glasses in the Ge 30 As 10 Se (60— x ) Te x system with x = 25, 28, 30, and 35 at.% Te, the Ge 30 As 10 Se 30 Te (30— y ) I y system with y = 5, 10, 20, and 30 at.% I, the Ge 30 As 10 Se 35 Te (25— z ) I z system with z = 2, 6, 10, and 20 at.% I, and the [Ge 30 As 10 Se 30 Te 30 ] (100— w )…
PET wastes were depolymerized by glycolysis at different weight ratios of propylene glycol at 200°C and in the presence of zinc acetate as catalyst. The glycolyzed products were identified by GPC, IR and MS techniques. It was found that the glycolyzed products consisted mainly of dimer and trimer of bis-hydroxy propyl…
It is shown that there are two routes of electrical transport in luminescent porous silicon. The first is between silicon crystallites and the other is through a disordered silicon compound tissue that wraps the crystallites. The conduction mechanism in the first route is similar to that encountered in granular metals…
A method for analyzing the elasticity problem of cubic quasicrystal is developed. The axisymmetric elasticity problem of cubic quasicrystal is reduced to a single higher-order partial differential equation by introducing a displacement function. As an example, the solutions of elastic field of cubic quasicrystal with…