Materials Literature
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N,N'-diallylmalonamide (DAM) has been prepared via classical aminolysis of diethyl malonate with allylamine. Its structure was confirmed by elementary microanalysis as well as 1H NMR and FT-IR spectroscopy. The new diallyl monomer is water-soluble and able to copolymerize radically with water-soluble monomers, such as…
Mist formation conditions in a mixture of non-condensable gas (nitrogen or helium) and water vapor, mass transfer rates onto a cooled wall under the mist formation and choking time are determined in a case of a laminar flow in a vertical round tube cooled from the outside at constant temperatures of 77K to 263 K. This…
Recovery processes in rolling-deformed (001)[110] tungsten single crystals having various degrees of purity are investigated. It is shown that the dislocation structure formed in the plastic deformation of tungsten single crystals is transformed in subsequent high-temperature anneals to a system of dislocation subboun…
Abstract In a 3·2·2 factorial experiment in three replicates, Ghanaian cotton prints (Real Wax, Real Java, Batik) were studied. Specimens were hand washed in soap solution, rinsed in clean water and dried in shade or sunlight twice a week for 3 weeks. Unwashed specimens were similarly sun‐dried or aired. All specimens…
Thermal analysis, powder diffraction, and Raman scattering as a function of the temperature were carried out on ${\mathrm{K}}_{2}{\mathrm{BeF}}_{4}.$ Moreover, the crystal structure was determined at 293 K from powder diffraction. The compound shows a transition from ${\mathrm{Pna}2}_{1}$ to $\mathrm{Pnam}$ space grou…
BaTiO 3 thin films deposited on the RuO 2 (250 nm)/Ru(20 nm)/TiN(200 nm)/Ti(20 nm)/(100)Si substrates by liquid-source misted chemical deposition are reported. The rapid thermal processing (RTP) technique was used for post deposition annealing. It was found that the strain was released and grain size increased for BaT…
Abstract Interchain transesterification reactions (ITR) play an important role in high temperature synthesis of most linear polyesters. For example, polyethylene terephthalate (PET) is prepared commercially by heating and distillation of ethylene glycol from a glycol capped oligomer of PET. In this paper, the potentia…
A new blister test using thermal expansion of an internal working gas trapped at a dissimilar interface between a thin polymer coating and a rigid adherend is developed to measure the adhesive strength at elevated temperature. The blister dimensions are measured by a thermomechanical analyser (TMA) and an optical micr…
The intercalation of a cubical octamer derived from the controlled hydrolysis of 3-aminopropyltriethoxysilane with smectite clays has been examined. The organosilicon cubanes are adsorbed in an amount that exceeds the cation exchange capacity of the mineral. The excess quantity is incorporated in the form of physicall…
Diamond films have been deposited by dc plasma chemical vapor deposition method. The addition of alcohol in the resource gas largely increases the deposition rate. The effects of alcohol addition on deposition rate and film quality are analyzed by scanning electron microscopy and Raman spectrometry. The mechanism of e…
In this study, sulfide based spinel materials of tin and titanium were synthesized (Cu2FeTi3S8 and Cu2FeSn3S8). A topotactic substitution of tin by titanium atoms was performed in order to obtain electrode materials with high specific capacity associated to a good conductivity. According to the first electrochemical t…
Electrical conductivity, differential scanning calorimetry and X-ray diffraction measurements have been performed on a single crystal of lithium hydrazinium sulfate, LiN 2 H 5 SO 4 , in the temperature range from 295 K to about 470 K. The crystal structures at several temperatures are determined in this temperature ra…
Polymer dispersed liquid crystal (PDLC) films are potentially useful in electro-optic devices since they can be used for vision products. In this work the PDLC thin films were prepared by a photopolymerization induced phase separation method and electro-optic properties of the films were investigated.
A cure kinetic model was presented to explain the reversion and the induction period commonly found in the vulcanization of rubber compounds. The model has three kinetic rate constants and one induction time which should be determined on the basis of isothermal rheometer curves. The torque curves calculated using the…
Transmission electron microscopy of the polycrystalline natural diamond, carbonado, reveals the existence of voidites, different from the voidites in type Ia natural diamonds, not only in their shape but also in their content and their origin. There is evidence that one group of voidites with an unusual shape is forme…
The effect of concentration of sodium hydroxide on the gelatinization of hypochlorite oxidized maize starches was thoroughly investigated. It was found that oxidation of starch increases its affinity towards gelatinization with alkali solutions at room temperature. Clear gelatinized starch could be obtained immediatel…
Time resolved small angle X-ray scattering is used to probe the microstructural changes occurring in a sample of poly(hydroxybutyrate), aged at room temperature, during a heating cycle designed to reverse any physical ageing. Evidence for the reversal of physical ageing is seen, but is unlikely to account for all the…
A new computer code, called ANFIBE (ANalysis of Fusion Irradiated BEryllium), has been developed to describe the most important processes (diffusion, gas precipitation, bubble coalescence, helium-bubble trapping, chemical trapping, etc.) thought to affect gas behavior and swelling in beryllium during fast neutron irra…
Abstract Poly(α‐methylstyrene‐styrene‐acrylonitrile) (AMSAN) is an additive used to improve the heat deflection temperature of PVC. The effect of its addition on the HDT of a typical injection molding formulation is studied. Other physical properties like impact strength, yield strength, modulus of elasticity, and vis…
This invited paper discusses chemical solution deposition (CSD) and characterization of ferroelectric and dielectric thin films. Liquid Source Misted Chemical Deposition (LSMCD) technology was employed to deposit thin films using Metal Organic Decomposition (MOD) precursors. The configuration of the LSMCD machine alon…