Materials Literature
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Abstract The effect of blend ratio on the crosslinking characteristics and dynamic elastic properties of HDPE/EPDM blends was studied by a torque rheometer. The crosslink density (a measure of tensile strength) first increases and then decrease with increase in EPDM content. The dynamic elastic property (a measure of…
Abstract The rheology of aqueous suspensions of Na halloysites with different particle shape has been investigated using a Haake rotary viscometer. Three halloysites from New Zealand were used: Matauri Bay (MB), Te Akatea (TA) and Opotiki (Op) which are mainly composed of thick long tubules, short thin laths, and sphe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCs2Ag2ZrTe4: A New Layered Telluride Containing Tetrahedrally Coordinated ZirconiumMichael A. Pell and James A. IbersCite this: J. Am. Chem. Soc. 1995, 117, 23, 6284–6286Publication Date (Print):June 1, 1995Publication History Published online1 May 2002Published inissue 1 Ju…
A binary Lennard-Jones fluid was cooled in an NPT ensemble by molecular-dynamics simulations. Depending on the cooling rate, we find a sharp transition from the melt either into a disordered structure or into a phase of icosahedral long-range order. We also observed a decagonal phase.
Statistically designed experiments have been made using partial carboxymethylated cotton fabric. The effects of three reaction parameters (concentrations of sodium hy droxide and monochloroacetic acid and time period) on wet pickup and carboxyl content are presented using polynomial models. Monochloroacetic acid conce…
The first high polarization ferroelectric main chain liquid crystalline polymers have been synthesized via hydrosilation polyaddition using α, ω-dihydro(tetramethyldisiloxane) and chiral, low molar mass mesogenic compounds bearing at each end an olefinic group. They exhibit broad, chiral smectic C and smectic A mesoph…
Abstract Dielectric studies in epoxy and epoxy composites, containing different volume fractions of three different dielectric fillers, have been performed using the impedance bridge method for the high frequency region, 10 2 to 10 5 Hz, and the d.c. transient current method for the low frequency region, 10 −4 to 10 −…
Adenylate kinase has been isolated from four related methanogenic members of the Archaea. For each, the optimum temperature for enzyme activity was similar to the temperature for optimal microbial growth and was approximately 30 degrees C for Methanococcus voltae, 70 degrees C for Methanococcus thermolithotrophicus, 8…
Isothermal charging, discharging and transport currents in fluoropolymer films are measured in the temperature range of 50 to 200/spl deg/C at electric fields to 40 MV/m. The currents are measured as a function of time elapsed after the application of steady state voltages in the range of 1 to 10/sup 4/ s. Charging cu…
Structural phase transitions in hydrogen-bonded (H-bonded) ferroelectrics and related materials are reviewed from the geometrical viewpoint of H-bond system. It is pointed out that the isotope effect in the transition temperature Tc has a correlation with the symmetry of H-bond and its geometric isotope effect. It is…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystallinity Dependence of Lewis Acidity and Lewis Basicity in Na ZeolitesAline Auroux, Minming Huang, and Serge KaliaguineCite this: J. Phys. Chem. 1995, 99, 24, 9952–9959Publication Date (Print):June 1, 1995Publication History Published online1 May 2002Published inissue 1…
We have measured the second virial coefficient ${\mathit{B}}_{2}$ of very dilute colloidal dispersions of charge-stabilized polystyrene latex spheres in the one-phase region of the mixed solvent 2,6-lutidine plus water. These measurements were made as a function of temperature for two solvent compositions, both of whi…
Dynamic charging is the condition in which the magnitude of the charge on the surface of a non-conductor, such as a polymer, under electron irradiation appears to change with the incident current density. Measurements confirm that this effect does occur and show that the magnitude of the effect depends on the relation…
Inhibition of aluminum corrosion in 0.5 M hydrochloric acid (HCl) solution by 5-benzylidine-1-methyl-2-methylthio-imidazole-4-one was tested using weight loss and polarization resistance measurements. Results of tests for weight loss, polarization resistance, and volume of hydrogen evolution (VHE) indicated inhibitor…
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Abstract Photochromic fulgides with a bulky 1-alkyl-1-indolylmethylidene and/or a bulky alkylidene substituent were synthesized and their photochromic as well as absorption spectroscopic properties were compared with those of the known prototype indolylfulgide, 3-[1-(1,2-dimethyl-3-indolyl)ethylidene]-4-isopropylidene…
Abstract The catalytic decomposition of dinitrogen oxide to nitrogen and oxygen was studied over various rhodium-loaded metal oxides. Rh/ZnO was found to have the highest activity. The effects of metal loading and calcination conditions upon the catalytic performance were also examined. An air-pretreated 0.5 wt% Rh/Zn…
Empirical corrections for the preferred orientation of grains in powder specimens have been generalized. Treatment of asymmetric diffraction geometries [Seemann–Bohlin (Guinier) geometry; glancing-angle geometry] is included. Inclined textures (in which the maximum of the pole density of preferentially oriented planes…
The effect of NaCl on growth and compatible solute utilization was investigated in a Halomonas species. Growth of Halomonas was observed in medium of low osmolarity (high water activity) when only 01 mM Na + was present. However, lowering the water activity, by addition of KCl or sucrose, inhibited growth in this low-…
Two methods for the experimental determination of single-phase induction motor parameters are studied. The one is a relatively complicated method based on single-phase measurements. The other utilizes a two-phase based strategy. An investigation was done to evaluate the accuracy with which the performance of a machine…