Materials Literature
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ABSTRACT The photodynamic activities of novel asymmetrically meso substituted cationic porphyrins, 5,10‐di(4‐methylphenyl)‐ 15,20‐di(4‐trimethylammoniumphenyl)porphyrin iodide 1 and 5‐(4‐trifluorophenyl)‐10,15,20‐tris(4‐trimethylammoniumphenyl)porphyrin iodide 2 and its metal complex with Pd(II) 3, have been investiga…
The influence of γ-irradiation on the electrical, swelling and mechanical properties of cross- linked butyl (IIR) rubber and ethylene propylene diene monomer (EPDM) and their blends have been investigated. The modulus increased, while the elongation at break decreased with irradiation. The gap width between carbon-car…
The compounds of interest in the present study were the natural compounds rutin and quercetin, which are strong antioxidants and have beneficial effects on human health (Myake & Shibamoto, 1997). They are present in everyday foods and beverages and in this way they are used as an integral part of human diet. Therefore…
The origin of the phenomenon of stress oscillation during step-wise stretching at room temperature for amorphous poly(ethylene terephthalate) (PET) was investigated using vibrational spectroscopy. For the first time, transmission Fourier transform infrared (FT-IR), attenuated total reflection (ATR) FT-IR, and micro-Ra…
Abstract The first part of this series of papers indicated that the melt stabilization performance of phenol/phosphite/metal stearate combinations in metallocene LLDPE (mLLDPE) was influenced by the purity of the fatty acid salt. In this second part, it is shown that the quality of the metal stearate has a direct infl…
A three-dimensional (3D) model for the simulation of the thermoplastic pultrusion process is developed. The simulation procedure and algorithms are based on the Finite Element–Nodal Control Volume (FE–NCV) approach. For illustration purposes, APC-2 CF–PEEK is used as a candidate material along with multiheater steel d…
Abstract The diimide hydrogenation of natural rubber (NR) was studied by using p ‐toluenesulfonylhydrazide (TSH) as a diimide‐releasing agent. The microstructure and the percentage of hydrogenation were studied by Raman, 1 H‐NMR and 13 C‐NMR spectroscopic techniques. Quantitative measurements on fraction of hydrogenat…
Electrically tunable laser action has been demonstrated in a dye-doped nematic liquid-crystal (NLC) waveguide by holographic excitation. The optical feedback was provided by the distributed feedback induced by two-beam interference by use of the Lloyd mirror configuration. Electrical tuning of the lasing wavelength wa…
A novel dynamic electrochemical impedance spectroscopy (DEIS) technique has been developed that offers the possibility to determine impedance characteristics in a time domain during the rupture of the protective passive layer. This ability is associated with the analysis methodologyof the technique, which enables sele…
Electrostatic charges are responsible for a variety of problems in industrial processes and customer equipment that use webs or sheets. Problems include particle contamination from attracting dust, sheets that stick to each other, and electrical discharges resulting in logic resets or damage to electrical components.…
The on-board production of a reducing gas mixture from liquid hydrocarbon for controlling diesel engine NO x emissions is being considered as an alternative to the other technologies that require supplemental reducing agents such as urea. Among the catalysts evaluated for the formation of acetaldehyde by partial oxida…
The compositions of the hydrodistilled leaf oils of seven Pittosporum species, which are endemic to New Zealand, were examined by GC/MS. Their composition divided the species into two groups. The oils from the first group (P. crassifolium, P. fairchildii, P. tenuifolium and P. umbellatum) contained sesquiterpenes, whi…
We report on the electron spin resonance characterization of dominant paramagnetic defects created in pure diamond by neutron irradiation followed by annealing at temperatures above 1150 °C. Along with the previously reported R7, R8, R10a, and R12 centers, two extra S = 1 centers, labeled as R7a and KUL13, and two S =…
Growth and morphological evolution of hexapod-shaped Cu 2 O microcrystals is carefully studied via a γ-irradiation reduction route at room temperature and under ambient pressure. The products are examined by means of XRD patterns and FE-SEM images. The as-obtained hexapod-shaped Cu 2 O microcrystal is composed of six…
Plasma-sprayed MnZn ferrite thick films are built up by splats, which consist of columnar grains with diameter /spl sim/200 nm and height /spl sim/1 /spl mu/m. The existence of the conductive wustite FeO in the as-sprayed films greatly reduces the dc resistivity. However, a useful structure can be developed in these f…
New strategies were developed which incorporate silica nanoparticles (<30 nm) into a nylon‐6 matrix, to form technically interesting hybrid nanocomposites with improved stiffness. Silica particles retained their original shape and size (10–30 nm), are mono‐dispersed and mainly non‐agglomerated as shown by TEM. Mech…
Abstract In‐situ polymerization is the polymerization of one monomer in the presence of another polymer. It can be performed by sequential emulsion polymerization, or by reactions in the melt, in the solid phase, or in solution. The current report describes two methods to obtain poly(vinyl chloride) (PVC) modification…
Proper selection of the power conversion cycle is a very important step in the design of a nuclear reactor. Due to the higher core outlet temperature (˜550°C) compared to that of light water reactors (˜300°C), a wide portfolio of power cycles is available for the lead alloy fast reactor (LFR). Comparison of the follow…
Abstract The influence of metal stearates on the melt stabilization performance of combinations of phenolic and phosphite antioxidants in a metallocene LLDPE (mLLDPE) has been investigated. This study focused on the effect of both the origin of the stearine blend (i.e., vegetable or animal) used in the formation of th…
We have studied the optimal cell configuration for a fringe-field driven transflective liquid crystal display that exhibits high image quality. The cell is composed of two half-plate compensation films, liquid crystal, and two parallel polarizers in the transmissive region. Viewing angle characteristics of the device…