Materials Literature
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The thermodynamical properties, structure and rheology of laponite dispersions have been studied as a function of solid fraction and ionic strength. The dispersions undergo a transition from Newtonian liquid to viscoelastic solid without phase separation. The increase of the ionic strength shifts the transition to low…
During the last decade, solidification modeling has known a sustained development effort, supported by academic as well as industrial research. The driving force behind this undertaking was the promise of predictive capabilities that will allow process and material improvement. The most significant recent rogress has…
The solid state structure of the fluorinated 1,2,3,5-dithiadiazolyl radical [p-NCC6F4[graphic omitted]]· is reported; it is the first dithiadiazolyl radical to retain its paramagnetic character in the solid state.
The structure of the boundary region between a metal and a solution (the so-called electrical double layer) depends on the chemical nature of the metal and of the solvent, the type and amount of solute, and the structure of the metal surface. This article is focussed on the effect of varying the crystallographic orien…
The diffusional coherency strain theory and its implications for chemically induced migration of liquid films and grain boundaries are reviewed and critically examined. The critical experiments in metals and oxides show the validity of this theory. The observed characteristics of this phenomenon: misfit dislocations a…
A new type of experiment involving temperature-variable in situ(one-dimensional)27Al MAS NMR studies, in which the sample is heated and studied directly in the NMR tube, has been developed. In the particular case chosen for study, the thermal conversion of the layered double hydroxide Mg6Al3.4(OH)18.82(CO3)1.5(NO3)0.3…
Abstract The dispersions of both reactive and nonreactive polymer‐polymer blend systems achieved in three different mixers are compared. The dispersions are prepared using an industrial scale twin‐screw extruder, a laboratory internal mixer, and a miniature cup and rotor mixer. The morphology development in the three…
The role of hydrogen bonds in the obtention of magnetic molecular materials is investigated in a purely organic openshell molecular solid. The structural and magnetic properties of the 2-(4-hydroxyphenyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-yloxyl 3-oxide radical (1) are studied in detail. The intermolecular h…
The three-dimensional structure of a collagen fibrillar network was examined by using a cell-maceration/SEM method combined with measuring the breaking strength of rainbow trout, yellowtail, and tiger puffer muscles. Rainbow trout and yellowtail muscles were tenderized during storage, but tiger puffer muscle showed no…
The paper describes a procedure for the representation of hysteresis in the laminations of power transformers in the simulation of electromagnetic transient phenomena. The model is based on the recognition that in today's iron cores the hysteresis loops are narrow and therefore the modeling details are only important…
A new model has been developed for hydrogen retention and trapping in and release from graphite. Two different regions in the graphite with different hydrogen transport and trapping behaviors are distinguished, the bulk region within, and the surface region on graphite crystallites. The model incorporates new experime…
The complex [(bpy)2Ru(tpphz)]2+(tpphz = tetrapyridophenazine), is obtained by reaction of [(bpy)2Ru(phendione)]2+with 5,6-diamino-1,10-phenanthroline; upon reaction with [(bpy)2Ru(Me2CO)2]2+, the fully conjugated dimer [(bpy)2Ru(tpphz)Ru(bpy)2]4+ is obtained.
Thin films of Ti-rich Ti–Ni were prepared by sputtering. The sputter-deposited films were annealed at three different temperatures of 773, 873 and 973 K for three different times of 1, 10 and 100 h in order to crystallize them. After the heat treatment, the shape memory behavior was examined with a thermomechanical te…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and Structural Characterization of Two New Phases of Aluminum TrifluorideNorman Herron, David L. Thorn, Richard L. Harlow, Glover A. Jones, John B. Parise, Jaime A. Fernandez-Baca, and Thomas VogtCite this: Chem. Mater. 1995, 7, 1, 75–83Publication Date (Print):J…
Silicone rubber is used for a wide variety of biomedical and industrial applications due to its good mechanical properties, combined with a hydrophobic surface. Frequently, however, it is desirable to alter the surface hydrophobicity of silicone rubber. Often this is done by plasma treatments but the effects are usual…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCarbon Composite Membranes: A Solution to Adverse Humidity EffectsCheryl W. Jones and William J. KorosCite this: Ind. Eng. Chem. Res. 1995, 34, 1, 164–167Publication Date (Print):January 1, 1995Publication History Published online1 May 2002Published inissue 1 January 1995htt…
Inductively coupled, radiofrequency-induced plasmas of propenoic (‘acrylic’) acid and propanoic acid, operated at a low electrical power (1–10 W), have been investigated using a combination of mass spectrometry (MS) and deposition-rate measurements. Thin films of plasma polymers of both compounds were deposited onto s…
The dissolution of colloidal MnO2 in aqueous solution induced by ultrasound has been investigated in the absence and presence of aliphatic alcohols at a pH of 4.5. It was found that the presence of the alcohols greatly enhanced the amount and rate of the dissolution of MnO2. It is shown that the rate of dissolution ca…
Metal nitrides - boron nitride, aluminium nitride, silicon nitride, transition metal nitrides metal carbides - silicon carbide, transition metal carbides metal phosphides and arsenides - indium phosphide, gallium arsenide metal oxides - sol-gel and polymer routes.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelf-Organization of Amphiphilic Porphyrins at the Air-Water InterfaceJohannes M. Kroon, Ernst J. R. Sudhoelter, Albertus P. H. J. Schenning, and Roeland J. M. NolteCite this: Langmuir 1995, 11, 1, 214–220Publication Date (Print):January 1, 1995Publication History Published…