Materials Literature
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Characteristics of Aircraft Structures and Materials. Introduction to Elasticity. Torsion. Bending and Flexural Shear. Flexural Shear Flow in Thin--Walled Sections. Failure Criteria for Isotropic Materials. Elastic Buckling. Analysis of Composite Laminates. Index.
Bulk samples of , with x = 0, 0.3, 0.5, with layered perovskite structure have been synthesized and investigated as regards their electrical, electronic and magnetic properties. It is found that has tetragonal structure and is a metallic ferromagnet with a magnetic transition temperature of 170 K. This compound shows…
The chemical reactions occurring during the intumescent process taking place in the combustion of the poly(2,6-dimethyl–1,4-phenylene ether)–high-impact polystyrene blends (PPE–HIPS) are studied in detail through the chemical characterization of the burnt and original material by infrared, pyrolysis–gas chromatography…
The thermal degradation and thermooxidative degradation of epoxidized natural rubber (ENR) were studied by thermogravimetry (TG). In the thermal degradation of ENR, the initial temperature of weight loss T0 = 1.20B + 348, the temperature of maximum weight loss rate Tp = 1.07B + 392, and the final temperature of weight…
Photophysical properties of zinc-tetraphenylporphyrin (ZnTPP) were studied in n -heptane/AOT/ethylene glycol and isooctane/AOT/ethylene glycol microemulsions. Results of steady state and transient fluorescence techniques show the existence of different spectroscopic ZnTPP species located at different environments of t…
An attempt was made to prepare ultrafine titanium dioxide (TiO 2 ) particles in the nanometer range by making use of the hydrolysis and condensation reactions of tetraisopropylorthotitanate (TTIP) in the inner aqueous phase of Aerosol OT reversed micelles formed in cyclohexane. Addition of linear alcohols (C 2 to C 6…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTPolymerizable Lyotropic Liquid Crystals Containing Transition-Metal and Lanthanide Ions: Architectural Control and Introduction of New Properties into Nanostructured PolymersHai Deng, Douglas L. Gin, and Ryan C. SmithView Author Information Department of Chemistry, Uni…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTA New Synthesis of Tetrathiooxalate and Its Conversion to C3S52- and C4S62-Jonathan G. Breitzer, Jun-Hong Chou, and Thomas B. RauchfussView Author Information School of Chemical Sciences and the Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Cha…
Flexible PVC pellets were treated at 150–250°C in 0–7M NaOH solutions for 0–12 h. The degree of dehydrochlorination of flexible PVC pellets increased with increasing reaction temperature and was about 100% at 250°C over 5 h. A porous char, 2–16 μm in pore size, was produced. The dehydrochlorination of PVC in the flexi…
Novel well-defined oligomers consisting of two dopable π-conjugated segments, 2,2‘-bipyrrole or 2,2‘-bithiophene, linked via 1,3-phenylene and end-capped with phenyl groups have been synthesized using palladium-catalyzed cross-coupling reactions. The molecules are considered as prototypical examples for polaronic ferr…
The polymer poly(vinylidene fluoride) (PVDF) was irradiated with X-rays produced by a nonmonochromatic (MgKα) source and the structural and electronic PVDF surface modifications were studied by X-ray photoelectron spectroscopy (XPS). Changes in the shape and intensity of the C1s and F1s lines show that a PVDF degradat…
(2,3,9,10,16,17,23,24-Octahydroxyphthalocyaninato)nickel(II) (NiPc(OH) 8 ) has been prepared by demethylation of (octamethoxyphthalocyaninato)nickel(II). Silylation of peripheral oxygen atoms using dimethyl- tert -butylsilyl chloride gave NiPc(OSi( t -Bu)Me 2 ) 8 as a convenient precursor to NiPc(OH) 8 with high solub…
In a normal Fermi liquid, Landau's theory precludes the loss of single-fermion quantum coherence in the low-energy, low-temperature limit. For highly anisotropic, strongly correlated metals, there is no proof that this remains the case, and quantum coherence for transport in some directions may be lost intrinsically.…
Cs 2 Hg 3 M 2 S 8 (M = Ge, Sn) were synthesized in 70% and 65% yields by reacting HgS, and Sn or Ge, in molten Cs 2 S x at 520 °C. Rb 2 Hg 3 Sn 2 S 8 and Rb 2 Hg 3 Ge 2 S 8 were synthesized in 42% and 73% yield by reacting the same reagents in molten Rb 2 S x at 350 °C. Cs 2 Hg 3 M 2 S 8 crystallize in the triclinic s…
Crystal structures are reported for the following complexes [Fe 3 O(OOCCMe 3 ) 6 (py) 3 ]ClO 4 ·0.5py, 1; [Mn 3 O(OOCCMe 3 ) 6 (py) 3 ]ClO 4 ·MeCN, 2; [Mn 3 O(OOCCMe 3 ) 6 (py) 3 ], 4; [Fe 3 O(OOCCMe 3 ) 6 (py) 3 ], 5. Crystal data are as follows: 1, system monoclinic, space group P 2 1 / n, a = 11.658(5) Å, b = 35.45…
Part 1 Conductive polymers: polyanaline as a corrosion barrier optimization of electrical and redox properties of electrogenerated polypyroles heterocycle-based electroconductive polymers electrochemical characteristics of conducting polymers anisotropy in electrically conducting polymers basic methods of synthesis an…
The Sudden Approximation (SA) for scattering of atoms from surfaces is generalized to allow for double collision events and scattering from time-dependent quantum liquid surfaces. The resulting new schemes retain the simplicity of the original SA, while requiring little extra computational effort. The results suggest…
LOS ANGELES—Refrigerator magnets are best known for holding shopping lists and old postcards onto refrigerator doors. But in a few years, much more powerful magnets could be the key to keeping food cold in so-called magnetocaloric refrigerators, which would be more energy efficient and less polluting than standard mod…
In this paper, we argue that, in 2-d, the weak localisation of bosons, which occurs on the insulating side of the superconductor-insulator transition, is characterised by $ρ\sim ln(1/T)$, as compared to $σ\sim lnT$ for fermions. Such an unconventional behaviour is tied to the diffusion pole of the delocalised (unconde…
A third generation replication machine has been developed to allow mass production of high quality holograms using DuPont holographic recording films. Improved coupling methods of film to the flat-plate masters are described. The operating features and production capabilities of this machine are discussed. An example…