Materials Literature
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The alkaline dissolution behaviour of sea–island type polyester microfibres were successfully monitored using a cationic dye staining method. Weight reduction behaviour of the alkali‐treated microfibre fabrics and the treated fabrics stained with cationic dye were investigated in a comparative manner. The termination…
The effect of temperature and type of physical foaming agent (HCFC-142b, n-pentane, and carbon dioxide) on the shear viscosity have been investigated for various types of polyolefin resins (PP, LLDPE, and HDPE). The viscosity changes have been monitored using a commercial on-line process control rheometer mounted on a…
The recently proposed split ring resonator (SRR) loaded waveguide as a simulator of a left-handed medium (LHM) is extended to the simulation of negative magnetic permeability media (NMPM) and used for the study of wave propagation in these media. The experimental results are compared with those provided by the discret…
Characterization of iron containing alumina supported catalysts was performed by transmission electron microcopy (TEM), Mo/spl uml/ssbauer, and XPS spectroscopy during formation of multiwall carbon nanotubes from acetylene at 1000 K. TEM images showed that carbon fibers (outer diameter is around 20-40 nm) were generat…
A kinetic study including dissolution process and diffusion of the dissolved molecules for a stressed solid in contact with its solution is analyzed. We estimate a condition fixing the prevailing dissipation mechanism and analyze it with a linear stability criterion. This criterion depends on which process is limiting…
For the purpose to demonstrate effectiveness of high-temperature nuclear heat utilization, Japan Atomic Energy Research Institute has been developing a hydrogen production system and has planned to connect the hydrogen production system to High Temperature Engineering Test Reactor (HTTR). Prior to construction of a HT…
In thermobonded nonwovens, the design of the bond point geometry is of major importance to the desired mechanical behavior. Despite the geometry's significance the selection is subject to a trial and error approach. This paper describes a numerical method for the prediction of the nonwovens tensile behavior depending…
ABSTRACT: A natrolite-cemented palagonite ash tuff unit is reported in a palaeo-basin in northeast Jordan. Phillipsite and chabazite are also identified. The zeolites were formed due to transformation of volcanic glass granules into palagonite by the reaction with percolating water in a closed hydrological system. Con…
The effects of alloying elements (Cu-Ni, Mo, and Ti) in line pipe steels on the susceptibility to sulfide stress cracking (SSC) was studied with respect to hydrogen permeation, crack nucleation, and crack propagation. The SSC susceptibility was evaluated using a constant elongation rate test (CERT) method in a NACE St…
Hydrophilic and chemically reactive porous media were prepared by adsorbing functional polymers at the surface of sintered polyethylene membranes. Modification of the membrane was accomplished by first exposing the membrane to an oxygen glow discharge gas plasma to introduce an electrostatic charge at the membrane sur…
Abstract Supported molybdena catalysts, with TiO 2 , CeO 2 and Al 2 O 3 supports, were studied by XPS and ISS. It was found that reliable results are obtained only when samples are calcined and transferred into the ultrahigh vacuum system without further contact with the ambient atmosphere (‘ in situ calcination’). Th…
Abstract This paper discusses how detailed studies on flammability at elevated pressures and temperatures can be applied to liquid‐phase oxidation of cyclohexane using air/oxygen and lead to an inherently safer process with better productivity. Flammability tests of cyclohexane/oxygen vapor and vapor bubbles under act…
We measured the angles produced in the Plateau border region of ‘dry’ soap films. In a simple experimental geometry, we demonstrated that a negative line tension can be attributed to these regions. This result has important consequences for the theoretical description of foams approaching the dry limit.
Abstract Summary: The crystallization behavior of a poly(butylene succinate)‐based ionomer (PBSi) was analyzed by morphological observations and synchrotron small‐angle X‐ray scattering (SAXS) experiments. The spherulitic morphology of PBSi is composed of irregular lamellae propagating outwards from the center with io…
Abstract Summary: A novel glyco‐peptide dendrimer‐type AIDS vaccine model with a well‐defined structure was synthesized. A low‐substituted, monodispersed, glyco‐peptide dendrimer was prepared by binding maltose to a proline‐poly(lysine) dendrimer with monofunctional prolyl amino groups on the periphery. To the hemisph…
Silver, palladium, and their alloys are frequently used as electrode materials for BaTiO 3 (BT) based dielectrics. However, the electrodes and dielectrics usually are cofired at high temperatures, and silver and palladium can dissolve into the BT during cofiring. In the present study, the solubility of silver and pall…
Making measurements of electron emission properties of insulators is difficult since insulators can charge either negatively or positively under charge particle bombardment. In addition, high incident energies or high fluences can result in modification of a material’s conductivity, bulk and surface charge profile, st…
Abstract Stainless steels have a great variety of potential applications in the petroleum industry, mainly as an alternative to carbon steel in corrosive environments. Within a number of media that can cause corrosion problems with these materials, only chloride solutions and hydrogen sulfide are of importance in oilf…
When a textile material absorbs a liquid, its color appears deeper than that when it is dry because of the difference in reflectance. The difference in the diffuse reflection between the air and the liquid leads to a difference in color depth between the dry and wet conditions. Using this observation, it is possible t…
The first part of this work deals with the effect of ageing (artificial weathering) on an intumescent flame-retarded ammonium polyphosphate (APP)/polyamide-6 (PA-6)/polypropylene (PP) blend. The study of the fire properties using the cone calorimeter shows a decrease in the performance caused by the artificial weather…