Polymer-polymer miscibility
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Forces and the existence of stresses in invariant continuum mechanics
In an invariant formulation of pth-grade continuum mechanics, forces are defined as elements of the cotangent bundle of the Banach manifold of Cp embeddings of the body in space. It is shown that forces can be represented by measures which generalize the stresses of continuum mechanics. The mathematical representation…
Herstellung und Charakterisierung von Polymerhölzern auf der Basis von niedrig-viskosen Epoxidharzen
Etude de la densite, de la stabilite dimensionnelle et des proprietes de sorption de composites obtenus par impregnation de bois de Pinus radiata, Picea abies, Fagus sylvatica et Populus marilandica par des resines epoxydes
Transformations of Inorganic Phosphorus During the Flooding and Draining Cycles of Soil
Abstract Phosphorus transformations that occur after anoxic soils are drained have been associated with acute P deficiencies in rotation crops following rice. Flooded rice may not respond to P fertilization while rotation crops respond markedly to P fertilization on similar soils. The changes that occur among the inor…
A Mn II Cu II Mn II trinuclear species with an S= 9/2 ground state
The S= 9/2 ground state of a linear MnIICuIIMnII trinuclear complex arises from the parallel alignment of the local spins (5/2) of the two terminal MnII ions through antiferromagnetic interactions with the local spin (1/2) of the central CuII ion.
Synthesis and structural characterisation of hexakis(triphenyl phosphine)hexagold(2+) nitrate, [Au6(PPh3)6][NO3]2, and related clusters with edgesharing bitetrahedral geometries
[Au6(PPh3)6][NO3]2 has been synthesised in low yield from [Au8(PPh3)8][NO3]2 and K[Ag(CN)2] and characterised by a single-crystal X-ray diffraction study. The compound crystallises as [Au6(PPh3)6][NO3]2·3CH2Cl2 in the monoclinic space group P21/a with four formula units in a cell of dimensions a= 25.674(5), b= 15.843(…
Tris(o-phenylenedioxy)cyclotriphosphazene: the clathration-induced monoclinic to hexagonal solid-state transition
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTris(o-phenylenedioxy)cyclotriphosphazene: the clathration-induced monoclinic to hexagonal solid-state transitionHarry R. Allcock, Michael L. Levin, and Robert R. WhittleCite this: Inorg. Chem. 1986, 25, 1, 41–47Publication Date (Print):January 1, 1986Publication History Pub…
Studies on clathrasils. IX*
Abstract Deca-dodecasil 3R, 120 SiO 2 · 6M 10 · 9M 12 · 6M 19 with M 12 = N 2 and M 19 = C 10 NH 17 (1-aminoadamantane), crystallizes in space group R [unk] m with a = 13.860(3) Å and c = 40.891(8) Å. Its crystal structure is built by corner-sharing [SiO 4 ] tetrahedra. The tetrahedra are connected to pseudohexagonal…
Electrochemical generation of an iron(IV) porphyrin
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical generation of an iron(IV) porphyrinJohn T. Groves and John A. GilbertCite this: Inorg. Chem. 1986, 25, 2, 123–125Publication Date (Print):January 1, 1986Publication History Published online1 May 2002Published inissue 1 January 1986https://pubs.acs.org/doi/10.…
On the identification of molybdophosphate complexes in aqueous solution
Aqueous solutions containing sodium phosphate and sodium molybdate ([P]= 0.01–0.07 mol l–1[Mo] : [P]= 1.25–15) were acidified with concentrated HCl and the formation of molybdophosphate anions was followed by 31P n.m.r. spectroscopy with a view to establishing this technique as an easily applicable method for the iden…
Development of high strength low alloy steels for marine applications: Part 1: Results of long term exposure tests on commercially available and experimental steels
High strength low alloy (HSLA) steels, both commercially available and experimentally prepared, were immersed at 45 and 90 m depths in the North Sea for periods ranging from 1·6 to 7·2 years. General corrosion, pitting corrosion, and crevice corrosion behaviour were evaluated after immersion. The influence of alloying…
Small-Angle X-Ray and Neutron Scattering
Abstract This article presents the experimental and theoretical aspects of small-angle scattering, and discusses specific applications used in the characterization of metals, glasses, polymers, and ceramics. The basic methods of collimating x-rays, the cause of smearing from a line source, desmearing parameters, and t…
Nondegradative Preparation of Amorphous Cellulose
Amorphous (noncrystalline) cellulose was prepared by dissolving cotton hydrocellulose in the dimethylsulfoxlde-paraformalde-hyde solvent system and regenerating the cellulose by slow addition of the resultant raethylol cellulose solution to stirred 0.2M sodium alkoxide in methanol :2-propanol (1:1 vol.). The regenerat…
Permeability and Pore Structure of Cement Pastes Containing Fly Ash, Slag, and Silica Fume
As part of research to develop a highly durable concrete container for radioactive waste disposal in chloride and sulfate bearing granite groundwaters, a variety of cement pastes were studied. A sulfate resisting portland cement was used with various replacement levels of Class F fly ash and pelletized blast furnace s…
Effect of Plastic Deformation Modes on Tensile Properties of Beta Titanium Alloys
The tensile properties of β phase Ti–V, Ti–Mo and Ti–Nb polycrystals with various compositions were investigated at 300 and 77 K, and they were related to plastic deformation modes determined by optical and transmission electron microscopy. The stress-induced ω phase transformation occurs in {332}〈113〉 mechanical twin…
Rhombohedral crystal structure of compounds containing boron-rich icosahedra
The crystal structures of several icosahedral boron containing compounds have been refined using Mo Kα intensity data. Though these compounds, α‐boron, boron carbide, boron phosphide and boron arsenide, differ chemically, all have the same basic rhombohedral structure. The structures consist of icosahedral units bonde…
Asymmetric synthesis of helical metallocenes
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAsymmetric synthesis of helical metallocenesAnantha. Sudhakar and Thomas J. KatzCite this: J. Am. Chem. Soc. 1986, 108, 1, 179–181Publication Date (Print):January 1, 1986Publication History Published online1 May 2002Published inissue 1 January 1986https://pubs.acs.org/doi/10…
Polyetherimides. II. High‐temperature solution polymerization
Abstract The polymerization and characterization of the ether‐containing aromatic polyimides of the following general structure are presented. magnified image The polymerization was conducted in one step in homogeneous solution of m‐cresol at high temperatures. Typical polyeterimides (PEI) were noncrystalline and show…
Observation of microstructure and corrosion behaviour of some aluminium bronzes
The short term corrosion behaviour of four as-cast commercial aluminium bronzes has been examined by immersing the materials in artificial sea water for various lengths of time. Optical and scanning electron microscopy showed that the phases which underwent selective attack were: martensitiβ in the aluminium bronze, A…
Exact Solution for the Rate of Creeping Flame Spread over Thermally Thin Materials
In this work we present the exact solution for the rate of creeping flame spread over thermally thin materials based on de Ris' (1969) formulation of the problem. The publication of the present work was prompted by a recent paper by Wichman and Williams (1984). These authors noted that de Ris (1969) obtained theoretic…