Materials Literature
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We report on an unusual variant in liquid crystal polymorphism where a nematic phase is created from a binary mixture of two compounds, neither one of which in its pure state exhibits the nematic phase. One of the compounds in its pure form exhibits only a smectic A phase which is stabilized by an extended alkyl chain…
The cylindrical or tubiliform glands of the spider Nephila clavipes have been studied and compared to the large ampullates on which we have previously reported. The three pairs of cylindrical or tubiliform glands secrete the fibroin for the organism's egg case. Their solubilized luminar contents migrate as a homogeneo…
Core spun yarns with a filament core and a cotton wrap were prepared and made into fabrics. The properties of these yarns and fabrics in comparison with all-cotton and intimate staple blend controls were investigated. This study included the dyeing of these fabrics and finishing for smooth drying and flame retardancy.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTModeling growth rate dispersion in a batch sucrose crystallizerKris A. Berglund and Vincent G. MurphyCite this: Ind. Eng. Chem. Fundamen. 1986, 25, 1, 174–176Publication Date (Print):February 1, 1986Publication History Published online1 May 2002Published inissue 1 February 1…
The main properties of a newly developed impregnant ant for high voltage power capacitors are given. This new liquid, a mono dibenzyltoluene blend (M/DBT), has a very high degree of aromaticity. The results of many tests carried out both on model and large capacitors are reported. A screening test using a transparent…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTemperature dependence of the reaction hydroperoxo (HO2) + hydroperoxo at low pressuresGerald A. Takacs and Carleton J. HowardCite this: J. Phys. Chem. 1986, 90, 4, 687–690Publication Date (Print):February 1, 1986Publication History Published online1 May 2002Published inissu…
Abstract Draw ratios have been measured for samples of polyethylene and trons ‐polyisoprene, crystallized at various temperatures and at various degrees of orientation. The values obtained range from unity, i. e., no drawing is observed, up to values of about 15X for materials crystallized in the oriented state and th…
Abstract not Available.
Although many mixed layer growth correlations have been developed for stratified solutions which are eroded by mechanically driven mixed layers, little has been done to determine their applicability to solutions for which erosion is thermally driven. In this study entrainment rates have been determined from measuremen…
Abstract The formation of hydroxy-Al-interlayered montmorillonite was affected by complexing organic acids. Montmorillonite (<2.0 μ m) was aged for three months at an initial pH of 5.0 or 6.0 in AlCl 3 solutions containing citric or tannic acid at organic acid/Al molar ratios from 0 to 1.0. The Al/clay ratio in the…
Swelling rates are calculated for two types of material with heterogeneous distributions of dislocations and voids, namely copper irradiated with neutrons to low dose at 250°C and heavily cold-worked copper irradiated with 1 MeV electrons in a HVEM at 250°C. Both materials are considered to consist of non-interacting…
Abstract Fluorescein and its derivatives fluoresceinamine and diiodofluoresceiniodoacetamide have been studied by surface enhanced resonance Raman spectroscopy (SERRS). Adsorption of the dyes at the silver/electrolyte interface requires attractive interactions between polar side groups (such as NH 2 , OH and COOH) wit…
The sintering of sputter-produced, silica-supported platinum thin films was studied using electron microscopy and x-ray diffraction following treatments in both reactive (ethylene oxidation—O2+C2H4) and nonreactive atmospheres (vacuum, O2, N2, C2H4, CO2, H2O). Sintering behavior in nonreactive atmospheres (thermal sin…
<div class="htmlview paragraph">Standard salt spray corrosion tests have been used with controlled purity AM60 castings to define the critical iron, nickel, and copper contaminant levels below which excellent corrosion performance can be obtained. As previously observed with the AZ91 alloy, the iron solubility a…
Absolute differential excitation cross sections of atomic oxygen (³P‐¹D transition) by electron impact have been measured by a crossed‐beam method. Atomic oxygen was generated by a thermal dissociation method. The energy and angular range covered were from 7 to 30 eV and from 30° to 150°, respectively. A few theoretic…
Long-term potentiostatic polarization curves of up to 120 days duration were developed for the following materials in seawater: 90:30 coppernickel (C70600), Monel(1) 400 (N04400), Inconel(2) 625 (N06625), Navy M-bronze (C92200), nickel-aluminum bronze (C95800), HY-80 steel, titanium 50 (R50400), 70:30 copper:nickel (C…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDynamics of spin-state interconversion and cooperativity for ferric spin-crossover complexes in the solid state. 5. Variable-temperature spectroscopic, magnetic, and single-crystal x-ray structural characterizations of the spin-state and order-disorder transformations of a S…
A study has been made of the superplastic tensile behaviour of a microduplex Ti–6AI–4V alloy in the temperature range 760–940°C. Maximum superplastic elongations were obtained for a temperature of 880°C at which the volume fraction of β–phase was approximately 0·4. At temperatures below about 850°C, the main microstru…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure, stability, and bonding in cyclodiphosphazene and cyclotriphosphazeneGeorges. TrinquierCite this: J. Am. Chem. Soc. 1986, 108, 4, 568–577Publication Date (Print):February 1, 1986Publication History Published online1 May 2002Published inissue 1 February 1986https://…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMethod for variation of grain size in studies of gas-solid reactions involving calcium oxideRobert H. Borgwardt, Nancy F. Roache, and Kevin R. BruceCite this: Ind. Eng. Chem. Fundamen. 1986, 25, 1, 165–169Publication Date (Print):February 1, 1986Publication History Published…