Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVariation in nitroxide probe chain flexibility within sodium dodecyl sulfate hemimicellesPrem. Chandar, P. Somasundaran, Kenneth C. Waterman, and Nicholas J. TurroCite this: J. Phys. Chem. 1987, 91, 1, 148–150Publication Date (Print):January 1, 1987Publication History Publis…
The paper presents the results of a study conducted on polymeric insulating materials in a salt-fog chamber. The materials examined include high temperature vulcanized (HTV) silicone rubber, ethylene propylene rubber (EPR) and cycloaliphatic epoxy. The influence of inorganic filler, type, concentration and dispersion…
In aqueous concentrated solution, DNA forms cholesteric liquid crystalline phases whose textures were previously analysed. The transition between the isotropic and the cholesteric phase occurs generally with formation of cholesteric spherulites which grew inside of the isotropic phase and coalesce to give a homogeneou…
A damage parameter is introduced in addition to conventional parameters of continuum mechanics and consider a crack surrounded by an array of microdefects within the continuum mechanics framework. A system consisting of the main crack and surrounding damage is called crack layer (CL). Crack layer propagation is an irr…
The photochemical properties of four different viologen di-cations (V2+,1,1′-dipropyl-, 1,1′-diheptyl-, 1,1′-diphenylmethyl- and 1,1′-diphenylethyl-4,4′-bipyridinium di-cations) intercalated into the interlayer space of montmorillonite have been studied. The colour of the intercalation compounds which were co-intercal…
Abstract The transport properties of water in neat poly(aryl‐ether‐ether‐ketone) (PEEK) coupons (2 to 6 mm thick) were investigated by gravimetric and mass spectrometric methods. The solubility of water increases from 0.44 wt.% at 35°C to 0.55 wt.% at 95°C; the temperature coefficient is 8 kJ/mol (1.9 kcal/mol). The d…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTpH dependence of surface-enhanced Raman scattering spectra from 2,2'-bipyridine adsorbed on silver colloidsMunsok. Kim and Koichi. ItohCite this: J. Phys. Chem. 1987, 91, 1, 126–131Publication Date (Print):January 1, 1987Publication History Published online1 May 2002Publishe…
The hydrogen absorption/desorption (HAD) behaviours of alloys based on Nd 15 Fe 77 B 8 (Neomax composition) and the stoichiometric phase Nd 2 Fe 14 B have been examined in an attempt to relate these effects to the microstructures of these alloys. The HAD processes were studied by microbalance, Differential Thermal Ana…
A test cycle with electrical, thermal and combined stresses has been performed on models of XLPE insulated: cables in order to characterize this type of cable from the viewpoint of endurance to combined stresses. For this purpose the method of Combined Analysis of experimental data has been used, thus permitting the g…
Characteristic features of the liquid-liquid phase separation process in polymer systems are presented, followed by a concise review of existing studies on phase-separation kinetics in polymer solutions and mixtures. Brief discussions have been made on two selective topics in this field, i.e., applicability of Cahn's…
High temperature embrittlement due to helium is controlled by helium-assisted cavity formation on grain boundaries. The basic mechanisms, underlying this process are discussed: bubble nucleation and growth, bubble-void conversion and void growth, crack formation by void coalescence. Differences between the microstruct…
Water absorption experiments have been carried out on three DGEBA type epoxy resins. A reactive diluent added to the resin increased water permeation, while a monomer that expanded on cure decreased it. Exposure at 97% relative humidity (RH) gave results that closely paralleled those obtained by water immersion, thoug…
A new method for preparing homogeneous cordierite ceramics by a sol-gel process is described. Reactive and fine cordierite-type amorphous powder with high homogeneity was prepared by the sol-gel method. The hydrolysis of metal alkoxides used as starting materials was controlled. Namely, Si(OC2H5)4, with a hydrolysis r…
Description Thirty-one papers cover several interrelated investigations: mechanical properties of porous coatings and substrates; characterizations of pore dimensions; biodegradation and biological analysis; performance in human and laboratory animals; modeling and implant fixation; and systems for future applications.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsolation, spectroscopic properties, and electrochemical properties of two oligomeric silicon phthalocyaninesDavid W. DeWulf, Jonathan K. Leland, Bob L. Wheeler, Allen J. Bard, Daniel A. Batzel, David R. Dininny, and Malcolm KenneyCite this: Inorg. Chem. 1987, 26, 2, 266–270…
For the numerical calculation of the interfacial energy between (111) fcc and (110) bcc planes by Gotoh and Arai, a geometrical interpretation based on the atomic structure is presented. The relationships of Nishiyama-Wassermann (N-W) and Kurdjumov-Sachs (K-S) are explained by the configuration of bcc and fcc atoms wh…
Solution dans la dicaline; le refroidissement conduit a une vitrification. Influence de la concentration du solvant sur la temperature de transition vitreuse
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactivity of carboxylic acid and ester groups in the functionalized interfacial region of "polyethylene carboxylic acid" (PE-CO2H) its derivatives: differentiation of the functional groups into shallow and deep subsets based on a comparison of contact angle and ATR-IR measu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHelical conformations in a polyamide of the nylon-3 familyJ. M. Fernandez-Santin, S. Munoz-Guerra, A. Rodriguez-Galan, J. Aymami, J. Lloveras, J. A. Subirana, E. Giralt, and M. PtakCite this: Macromolecules 1987, 20, 1, 62–68Publication Date (Print):January 1, 1987Publicatio…
All articles of this category The syntheses of peripherally substituted metal phthalocyanines (C 8 H 17 OCH 2 ) 8 PcM with M = Co, Ni and Pb are described. The macrocycle (C 8 H 17 OCH 2 ) 8 PcCo is reacted with sodium cyanide under oxidative conditions to give the cyano-bridged compound [(C 8 H 17 OCH 2 ) 8 PcCoCN] n…