Materials Literature
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Abstract Summary: Thermal characterizations were performed to further discern the miscibility and qualitative interactions in blends of isotactic polystyrene (iPS) and poly(cyclohexyl methacrylate) (PCHMA). A method based on the enthalpy relaxation of the blends was used to overcome the difficulty or ambiguity in reso…
Removal of helium, the ash from the D-T-fusion reaction, from a burning plasma flame, is one of the critical issues for future thermonuclear burning plasma. Even in plasmas driven by additional heating to large Q-values this is a severe problem. Recombination of fuel and ash ions at plasma exposed surfaces, re-emissio…
Abstract Semi‐aromatic thermoplastic polycyclohexylene terephthalate (PCT), initially wholly amorphous, was uniaxially drawn to study microstructural modifications as the appearance of the strain‐induced (S.I.) crystalline phase. Polyethylene terephthalate (PET) and poly(ethylene glycol‐co‐cyclohexane‐1,4‐dimethanol t…
Abstract Four new quaternary Ag-containing group 5 chalcogenides, KAg2NbSe4 (1), KAg2TaSe4 (2), K3Ag3Nb2S8 (3), and K3Ag3Ta2S8 (4), have been prepared through the use of molten alkali metal polychalcogenides as reactive fluxes and structurally characterized by single-crystal X-ray diffraction techniques. The layer-typ…
Abstract The market for protective clothing is growing in many fields, including flame resistance clothing, cut-resistance gloves and so on. High-performance fibres such as aramides are known to be flameproof and resistant to mechanical impacts, but they are sensitive to UV.The purpose of this study was to produce com…
Abstract— Photo‐alignment of anisotropic optical thin films enables realization of novel optical elements, which were not feasible up until now. Photo‐aligned anisotropic thin films can be applied to rigid or flexible substrates, which may be flat or curved. The optical performance of such films can be tailored to app…
Cementing of sand grains by organo‐Al and organo‐Fe complexes is thought to be a gradual process and takes at least a few thousand years. The resulting ortstein inhibits root penetration. Blueberries ( Vaccinium corymbosum L.) in isolated regions of blueberry fields in Michigan experience reduced growth that has been…
An accurate evaluation of the magnetic field of the iron-core reactor coils by the finite-volume method (FVM) is presented. The linear and quadratic interpolation scheme of FVM is developed. The numerical results are compared with those obtained by the finite-element method. Good agreement is obtained. The main advant…
Abstract The fracture and yield strength of polyetherimide was evaluated over a temperature range of 23 to 140°C for materials with number‐average ( M n ) and weight‐average molecular weight ( M w ) ranging from 15.6 to 22.8 and 36.6 to 52.3 kg/mol, respectively. The brittle‐to‐ductile transition temperature, where an…
Crystals of Cs x (NH 4 ) 1− x LiSO 4 (0.39≤ x ≤1.0) solid solutions are grown and investigated using polarized light microscopy and measurements of the birefringence in the temperature range 100–530 K. The ( x - T ) phase diagram of the Cs x (NH 4 ) 1− x LiSO 4 solid solutions is constructed. It is demonstrated that,…
Abstract Polystyrene (PS) was modified by reactive extrusion with trimethylolpropane triacrylate (TMPTA) and dicumyl peroxide (DCP). The coupling reaction caused by TMPTA increased the molecular weight of PS, and this coupling reaction was enhanced in the presence of DCP at high TMPTA/DCP ratio. The rheological proper…
Microstructures and magnetic domain structures of melt-spun Nd-Fe-B permanent magnets were investigated in detail by analytical electron microscopy and electron holography. While the crystal orientation of matrix Nd2Fe14B grains was analyzed by nanobeam electron diffraction, precipitates of a few tens of nanometers at…
The effects of commercially available 1,2-methyl-1,2-oxaphospholan-5-one 2-oxide (OP), melamine, and novolac on the limiting oxygen index and UL94 test behavior of high impact polystyrene (HIPS) were studied. A synergistic flame-retardant effect between OP and melamine was observed at the ratio 3: 2 of the additives.…
Abstract This report is to discuss the bowing phenomenon and the sag elimination tension for biaxial oriented PA 6 film process, which consists of double bubble tubular film process and the thermosetting tentering. The bowing phenomenon does not occur in the heat set of the triple bubble tubular process. However, ther…
The waveguide filled with a lossless dispersionless material with negative permeability is analyzed. It is shown that such a waveguide supports the propagation of backward waves below the cut-off frequency. There is no propagation above the cut-off-frequency and the waveguide behaves as a low-pass filter; thus, it is…
Abstract The effect of pH on inhibition and enhancement of luminol‐H 2 O 2 ‐CO 2+ chemiluminescence (CL) by 18 phenolic compounds and 20 amino acids was studied. It was found that most of the tested compounds showed an inhibiting effect of lower pH and an enhancing effect at higher pH. At a midrange pH, for some pheno…
A propagating brush discharge (PBD) usually occurs on a highly charged thin film with a grounded metal backing plate and often becomes energetic enough to ignite a flammable gas/vapor and even a dust cloud. In an actual situation, a PBD is seen on the surface of a large-sized flexible intermediate bulk container (FIBC…
Highly-oriented ZnO films were deposited on Y2O3/Si(111) and Y2O3/Si(100) substrates by atmospheric pressure metal-organic chemical vapor deposition (MOCVD) using zinc acetylacetonate (Zn(C5H7O2)2) and oxygen as sources. The substrate temperature and O2 gas temperature were all kept at 500 °C. Y2O3, thermodynamically…
In this study we examine the mixture carbon dioxide (CO2) and 2-propanol (PrOH) as foaming agents for poly(methyl methacrylate). Gaseous CO2 was dissolved in liquid PrOH, allowing for injection of a homogenous liquid mixture into the extruder. The advantage of such a system is that the CO2/PrOH ratio remains stable, a…
The phases of variable composition Ca 3 − 3 x Nd 2 x ( A O 4 ) 2 ( A = P, V; 0 ≤ x ≤ 0.14) based on calcium orthophosphate or orthovanadate are studied by Raman spectroscopy. The influence of the composition and temperature on the structural features of these compounds is considered. The changes observed in the Raman…