Materials Literature
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Abstract In view of the current demand for novel, non‐toxic, flame‐ and smoke‐ suppressant systems for synthetic polymers, certain inorganic tin compounds have been evaluated as fire retardants in a series of commercial brominated polyester resin formulations. The results obtained clearly show that zinc hydroxystannat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExciton coupling in bis(phthalocyaninato)tin(IV)Osamu Ohno, Naoto Ishikawa, Hideyo Matsuzawa, Youkoh Kaizu, and Hiroshi KobayashiCite this: J. Phys. Chem. 1989, 93, 5, 1713–1718Publication Date (Print):March 1, 1989Publication History Published online1 May 2002Published inis…
Abstract Using dielectric techniques to monitor thermoset properties on‐line during processing requires a mathematical relationship between the experimentally obtained signals and the physical state of the polymer. Such a relationship accounting for the dielectric response during both isothermal and dynamic cure exper…
The preparation of high‐purity mullite powders (3Al 2 O 3 · 2SiO 2 ) was examined using aluminum salts or boehmite and fumed silica. The combination of aluminum sulfate and fumed silica was found to have the highest quality for mullite powder. A slurry consisting of an aqueous solution of aluminum sulfate and fumed si…
Abstract The absorption of organic molecules into the bulk of H3PW12O40 and its salts was studied. Polar (or basic) molecules, such as alcohols and amines, were readily absorbed into H3PW12O40, but nonpolar hydrocarbons were not absorbed. The absorption depended not only on the polarity but also on the molecular size.…
Fructose-1,6-bisphosphatase (D-fructose-1,6-bisphosphate 1-phosphohydrolase, EC 3.1.3.11) from the cortex of pig kidney and its complexes with either fructose 2,6-bisphosphate (Fru-2,6-P2) or adenosine monophosphate (AMP) have been crystallized in the space group P3(2)21. The three-dimensional structure of the native…
The smectic A layer structure of a homogeneously aligned 8CB liquid crystal (25 µm in thickness) has been studied by X-ray diffraction analysis. Contrary to the common recognition, it is found, for the first time, that the local layer structure of this type of cell changes to a chevron layer structure from a book-shel…
A model for chemical vapor infiltration is applied to the study of the growth of alumina from the chemical reaction among AlCl 3 , H 2 , and CO 2 within a SiC‐fiber bundle which is situated in an isothermal hot‐wall reactor. The pore space between the fibers is simulated by cylindrical capillary tubes. The model consi…
We study cellular structures moving at constant velocity, in a symmetric model of directional solidification. This is done by employing Newton's method to solve a discretized version of the integro-differential equation for the solid-liquid boundary. Our results indicate that there is a continuous band of allowed wave…
We report on the temperature evolution of the 2${k}_{F}$ charge-density wave (CDW) in the blue bronze ${\mathrm{K}}_{0.3}$${\mathrm{MoO}}_{3}$. Using detailed profile analysis of the x-ray scattering, we were able to deduce: (i) from the temperature dependence of the peak intensity the square of the order parameter in…
Specific DNA staining for electron microscopic observation is simplified by a shorter synthesis of the staining reagent. The new, more reliable reagent, osmium ammine-B, is stable for more than a year, dissolves completely in water, and does not require reoptimization of staining conditions for every batch, yet reprod…
An explicit formula for the chemical potential (μ) of simple fluids is derived for a whole class of integral equation theories, including the Percus–Yevick approximation and some other, more recently proposed closures. This formula only requires the pair correlation functions for one single state of the system, and ap…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSemiconductor to metal transition of WS2 induced by K intercalation in ultrahigh vacuumF. S. Ohuchi, W. Jaegermann, C. Pettenkofer, and Bruce A. ParkinsonCite this: Langmuir 1989, 5, 2, 439–442Publication Date (Print):March 1, 1989Publication History Published online1 May 20…
The synthesis is described of some liquid crystal polymers containing various degrees of cross linking units. Such materials show properties over and above those observed either from low molecular weight liquid crystals, or from conventional rubbers. Thus, though these compounds show simple rubber like elasticity in t…
The electrodeposition of binary aluminum‐manganese alloys from chloroaluminate molten salts is reported. The manganese content of the electrodeposit varies from 7 to 30 w/o and is dependent upon deposition potential and the relative concentrations of and Mn ++ in the melt. At small cathodic overpotentials the depositi…
Static and dynamic light scattering are used to study the aggregation kinetics and structure of colloidal gold. Fast aggregation is achieved by either addition of pyridine, lowering of the pH, or addition of salt. The kinetics of rapid growth is followed by measurement of the polarized relaxation time ${\ensuremath{\t…
Small-angle neutron-scattering structure factor measurements were made on sterically stabilized silica spheres dispersed in benzene up to volume fractions of 0.30. Benzene is only a marginal solvent for the stabilizing layer on the surface of the particles. The particles are made attractive by lowering temperature. Th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCyclodextrin-sandwiched porphyrinYasuhisa Kuroda, Takashi Hiroshige, Takashi Sera, Yasushi Shiroiwa, Hiroyuki Tanaka, and Hisanobu OgoshiCite this: J. Am. Chem. Soc. 1989, 111, 5, 1912–1913Publication Date (Print):March 1, 1989Publication History Published online1 May 2002Pu…
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