Materials Literature
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Abstract Recently it has become apparent that for quantitative studies the I (ω) Raman spectrum measured directly from the spectrometer must be corrected for temperature and frequency factors to give a reduced Raman spectrum, R (ω), which is directly proportional to the intrinsic molar scattering factor. Although gene…
The well known, extremely reactive [18]annulene 1 and the hypothetical isomer 2 should be capable of being stabilized by CH2- and CHCH-groups as internal and external bridges, respectively. The corresponding hydrocarbons, 3 and 4, are still unknown, although they are of great interest as links between the non-natural…
SUMMARY The reaction of cadmium with calcite was studied with 10 −6 –10 −2 M Cd 2+ using 4g CaCO 3 and 50 ml solution. The calcite‐water suspension was equilibrated for 2 d before adding Cd(NO 3 ) 2 . The CaCO 3 surface has a high affinity for Cd and at < 1 μmol g −1 a linear adsorption isotherm (C‐type) describes…
A survey of work at the Kernforschungszentrum Karlsruhe is presented on the chemical state of selected fission products that are relevant in the fuel cycle of light water reactor (LWR) and fast breeder reactor fuels. The influence of fuel type and irradiation progress on the composition of the Mo-Tc-Ru-Rh-Pd fission p…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA class of conducting polymers having nonconjugated backbonesM. ThakurCite this: Macromolecules 1988, 21, 3, 661–664Publication Date (Print):March 1, 1988Publication History Published online1 May 2002Published inissue 1 March 1988https://pubs.acs.org/doi/10.1021/ma00181a021h…
Metallic electromigration can be defined as the movement of metallic material, usually through or across a nonmetallic medium, under the influence of an electric field. As such, it has assumed increasing importance in the performance and reliability of packaging systems that incorporate electric contacts. The characte…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOleanderol, a New Pentacyclic Triterpene from the Leaves of Nerium oleanderSalimuzzaman Siddiqui, Farrukh Hafeez, Sabira Begum, and Bina S. SiddiquiCite this: J. Nat. Prod. 1988, 51, 2, 229–233Publication Date (Print):March 1, 1988Publication History Published online1 July 2…
Abstract The effect of selected low molecular weight organic acids on release of K from K‐bearing minerals was investigated by reacting biotite, muscovite, microcline and orthoclase (20–50 µm) with 0.01 mol L −1 oxalic and citric acids or water for 1 h to 30 d. The rates of the K release varied with the nature of orga…
Measurements of the temperature dependence of the coercive field, of the magnetic viscosity, and of the angular dependence of the coercive field are reported for ferrite and rare-earth-transition-metal sintered magnets. A satisfactory explanation for the observed properties is obtained in a simple model, considering t…
The paper is concerned with the representation of the relationship that exists, for a given material and temperature and for small deformations, between histories of applied stress and the observed strain and the accompanying changes in internal structure of the material. Emphasis is given to creep damage in metals as…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExperimental studies of gas-phase main-group metal clustersManfred M. KappesCite this: Chem. Rev. 1988, 88, 2, 369–389Publication Date (Print):March 1, 1988Publication History Published online1 May 2002Published inissue 1 March 1988https://pubs.acs.org/doi/10.1021/cr00084a00…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGlass transition and melting behavior of poly(ethylene 2,6-naphthalenedicarboxylate)Stephen Z. D. Cheng and Bernhard WunderlichCite this: Macromolecules 1988, 21, 3, 789–797Publication Date (Print):March 1, 1988Publication History Published online1 May 2002Published inissue…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular ferromagnetsJoel S. Miller, Arthur J. Epstein, and William M. ReiffCite this: Acc. Chem. Res. 1988, 21, 3, 114–120Publication Date (Print):March 1, 1988Publication History Published online1 May 2002Published inissue 1 March 1988https://doi.org/10.1021/ar00147a004Re…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicrostructure of isotactic polypropylene prepared with homogeneous catalysis: stereoregularity, regioregularity, and 1,3 insertionAlfonso Grassi, Adolfo Zambelli, Luigi Resconi, Enrico Albizzati, and Romano MazzocchiCite this: Macromolecules 1988, 21, 3, 617–622Publication…
Abstract Intercalated compounds of montmorillonite and poly-6-amide were prepared by heating mixtures of ɛ-caprolactam and 5, 10, 15 and 30 wt% of montmorillonite, cation-exchanged with NH3+(CH 2 ) 11 COOH, at 250°C in a nitrogen atmosphere, and examined by X-ray powder diffraction (XRD), transmission electron microsc…
Abstract We discuss some theoretical aspects of interfacial and emulsifying activity of block copolymers A‐B in incompatible blends of homopolymers A and B. We predict the reduction in interfacial tension due to equilibrium adsorption of copolymers at the interface. It is shown that for an appropriate choice of block…
This research work, which will include four publications, was done as a result of the discussions, doubts and controversies which were originated some time ago about the ASTM C 452 method and specially on its 7.0% SO3 content. To clarify this two portland cements P-1 (14.11% C3A) and P-31 (7.62% C3), all it industriéi…
In this works, we have modified a bitumen from Amposta by using the Friedel and Crafts reaction with toluylene-2,4-diisocyanate in presence of aluminium trichloride, presenting as well as the characteristics of the original bitumen as the ones of the modification products. We have made technological test, aging of thi…