Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDimerization of cobalt(II) tetrasulfonated phthalocyanine in water and aqueous alcoholic solutionsYu Chu Yang, J. Richard Ward, and Reginald P. SeidersCite this: Inorg. Chem. 1985, 24, 12, 1765–1769Publication Date (Print):June 1, 1985Publication History Published online1 Ma…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe melt properties of ring polystyrenesJ. RooversCite this: Macromolecules 1985, 18, 6, 1359–1361Publication Date (Print):June 1, 1985Publication History Published online1 May 2002Published inissue 1 June 1985https://pubs.acs.org/doi/10.1021/ma00148a059https://doi.org/10.10…
Supported catalysts, one of the commonest forms of heterogeneous catalysts in practical use, consist of small crystallites of a catalytically active component dispersed in a porous support of high surface area. Impregnation of the support with an aqueous solution of a compound containing the appropriate catalytic comp…
Abstract The effect of ethyl benzoate (EB) as a component of the solid catalyst (“internal” base) and/or of the co‐catalyst (“external” base) on propene polymerization in the presence of different MgCl 2 ‐supported Ziegler‐Natta systems was investigated systematically. From the experimental results, it is suggested th…
Abstract Diagenetic illitic clays from seven North American bentonites of Ordovician, Devonian, and Cretaceous ages and from three subsurface North Sea sandstones of Permian and Jurassic ages have been examined by X-ray diffraction (XRD) and transmission and scanning electron microscopy (TEM and SEM). XRD indicates th…
Abstract To deformation and fracture behavior of several polypropylene (PP) and rubber‐modified PP materials have been investigated. Plastic deformation mechanisms of these systems depend upon the test rate and temperature with high rates and low temperatures being in favor of crazing. The ductility and toughness of t…
A model is presented in which the sintering behavior of a ceramic film which is constrained by a rigid substrate is contrasted with the sintering behavior of a free film. The problem is made simple by the assumption that the stress field developed in the film is uniform. This simplification allows several closed form…
Single crystals of phosphors have been prepared. Optical absorption spectra and stimulation spectra measured with polarized light are in good agreement with each other. The experimental ESR spectra of the F − ‐rich and X − ‐rich undoped powder phosphors which have been x‐rayed coincide with the calculated spectra of F…
Abstract When crystals of organic compounds are grown in the presence of growth inhibitors, there is a change in crystal morphology. A stereochemical correlation exists between the crystal structure, its modified morphology, and the molecular structure of the inhibitor. This correlation has been successfully exploited…
Results of using "ion thinning" techniques as final stage in the preparation of polished samples of portland cement clinker for SEM studies are showed. Under proper conditions, flat and clean surfaces are obtained which allow to discriminate textural facts (grain size, form, etc.), hardly to see on conventional polish…
In this work, and interpretation of results of the chemistry analisys of the I.R., I. L. and SO3 in portland cements, is presented.
This study, first part of a work where an account of the evolution of the mechanical resistances of various series of mortar and concrete tests submitted to the action of different agressive solutions will be given, sets up the chemical resistant behaviour of a sulphate resistant portland cement (with a content calcul…
The work have been carried out in two consecutive phases. Firstly the four wooden nave forms were sustituted by overdimensioned iron lattice girders that entered the aisles and ended in a capping hoop thus allowing the absorption of the pushes from the vaults that were ruining the church fabric. Besides a careful impe…
The Ca10(SiO4)3(SO4)3F2 is synthetized and the reflexions obtained by DRX are studied, comparing them with this registered in the J.C.P.D.S. file which corresponds to the same component. A new listing which includes 27 new reflexions is proposed. Some values of the reflexions given in the file 23-113 are modified as w…
This work, devoted to the First Consultation sponsored by ONUDI-UNCHS (HABITAT) relative to "Building Materials Industry", selects three different sides of it: the final version of the conclusions and recommendations prepared in Athens by the participants, the author personal answers, as a participant himself, to some…
Abstract Chemical analysis (including H 2 , F 2 , FeO, Fe 2 O 3 ) of a Mg‐vesuvianite from Georgetown, Calif., USA, yields a formula, Ca 18.92 Mg 1.88 Fe 3+ 0.40 Al 10.97 Si 17.81‐ O 69.0.1 (OH) 8.84 F 0.14 , in good agreement on a cation basis with the analysis reported by Pabst (1936). X‐ray and electron diffraction…
Abstract An electrically conductive plastic material was obtained by the electrochemical polymerization of pyrrole in a poly(vinyl chloride) matrix. The transmission electron microscopy shows that polypyrrole is uniformly distributed in the matrix. The conductivity of the composites fall in the range of 5 to 50 S/cm,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTXPS study on surface and bulk palladium oxide, its thermal stability, and a comparison with other noble metal oxidesMarcell PeuckertCite this: J. Phys. Chem. 1985, 89, 12, 2481–2486Publication Date (Print):June 1, 1985Publication History Published online1 May 2002Published i…