Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNovel multifunctional initiators for polymerization of 2-oxazolinesShiro Kobayashi, Hiroshi Uyama, Yutaka Narita, and Junichi IshiyamaCite this: Macromolecules 1992, 25, 12, 3232–3236Publication Date (Print):June 1, 1992Publication History Published online1 May 2002Published…
Formation of pits near inclusions on 304 stainless steel in (0.1 and 0.3 M ) and (0 and 2 m M ) solutions was investigated by a combination of surface analyses (Auger electron spectroscopy, scanning electron microscopy, and energy dispersive x‐ray analyses) and electrochemical methods. Microlithography techniques were…
The mechanical behavior of model two-dimensional materials is investigated by large-scale molecular-dynamics (MD) simulations on a massively parallel computer. Both a pair-potential and a model embedded-atom many-body potential are examined. A parallel MD algorithm is developed to exploit the architecture of the Conne…
Although deterioration of the magnetic characteristics of silicon steel due to shearing stress has been observed, the degree of deterioration has not previously been assessed quantitatively. With the recent development of a technique for measuring the microscopic distribution of flux density, the effects of stress on…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal decomposition of dilute aqueous formic acid solutionsAnne Belinda Bjerre and Emil SoerensenCite this: Ind. Eng. Chem. Res. 1992, 31, 6, 1574–1577Publication Date (Print):June 1, 1992Publication History Published online1 May 2002Published inissue 1 June 1992https://pu…
The thermal conductivity of thick-film diamond prepared by chemical vapor deposition (CVD) has been measured with heat flowing in a direction perpendicular to the plane of the film. A laser flash technique with fast infrared detection has been devised for measurement of thin samples with high conductivity. The conduct…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDegradation of nonalternating poly(ester amides)K. E. Gonsalves, X. Chen, and J. A. CameronCite this: Macromolecules 1992, 25, 12, 3309–3312Publication Date (Print):June 1, 1992Publication History Published online1 May 2002Published inissue 1 June 1992https://pubs.acs.org/do…
Abstract X‐ray photoelectron spectroscopy provides a useful tool for the critical comparison of the chemical nature of the nitrogens corresponding to the various intrinsic redox states of electroactive polypyrrole (PPY) and polyaniline (PAN) and their N‐substituted derivatives. Proton modifications of the PPY nitrogen…
This paper describes the design of shape memory alloy force and displacement actuators based upon the thermomechanical constitutive relations previously developed by the authors. Numerical simulations and design case studies are presented which show the utility and advantages of this method over design methods current…
Les structures de six dimeres de benzoate de cuivre(II) ont ete determinees. Les valeurs de -2J obtenues a partir des mesures de susceptibilite magnetique sont situees dans la gamme 316-350cm -1 . La petite interaction ferromagnetique anormale de l'additif quinoleine , -2J=267cm -1 , serait due a la structure courbee…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPillared clays as superior catalysts for selective catalytic reduction of nitric oxide with ammoniaR. T. Yang, J. P. Chen, E. S. Kikkinides, L. S. Cheng, and J. E. CichanowiczCite this: Ind. Eng. Chem. Res. 1992, 31, 6, 1440–1445Publication Date (Print):June 1, 1992Publicati…
Abstract The characteristic ratio C ∞ and the entanglement molecular weight M e are two key molecular parameters that control melt viscoelasticity, solid mechanical (brittle/ductile) behavior, and adhesion of polymers. We show that the characteristic ratio C ∞ and the entanglement molecular weight M e can be predicted…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSquaraine chemistry. Synthesis, characterization, and optical properties of a class of novel unsymmetrical squaraines: [4-(dimethylamino)phenyl](4'-methoxyphenyl)squaraine and its derivativesKock Yee Law and F. Court BaileyCite this: J. Org. Chem. 1992, 57, 12, 3278–3286Publ…
The reaction between SiC and SiO 2 has been studied in the temperature range 1400–1600 K. A Knudsen cell in conjunction with a vacuum microbalance and a high‐temperature mass spectrometer was used for this study. Two systems were studied—1:1 SiC (2 wt% excess carbon) and SiO 2 ; and 1:1:1 SiC, carbon, and SiO 2 . In b…
Finite element calculations have been carried out for spherical unit cells containing a concentric spherical hole to characterize the power law creep of a material containing voids. Axisymmetric states of macroscopic stress were applied to the unit cells ranging from purely hydrostatic loading to purely deviatoric str…
Abstract The melting behavior of poly(butylene terephthalate) (PBT) has been investigated, and a simulation has been performed to determine whether the multiple melting endotherms observed during the thermal analysis of PBT can be explained by the simultaneous melting and recrystallization of an initial distribution o…
We develop here an empirical procedure for constructing embedded-atom-method (EAM) interatomic potentials for hcp metals. This is based on fitting perfect-crystal lattice properties. The contribution of the lattice inner degrees of freedom, due to the two atoms per lattice site, is included into the elastic response o…
Room temperature vulcanizing (RTV) silicone rubber coatings are applied to electrical insulators to improve their subsequent insulation strength, particularly under wet conditions. Under prolonged wetting the hydrophobicity of the coating is reduced temporarily and the insulator protection is lost. After a dry period,…
The structure and function of the xylose (glucose) isomerase from Actinoplanes missouriensis have been analyzed by X-ray crystallography and site-directed mutagenesis after cloning and overexpression in Escherichia coli. The crystal structure of wild-type enzyme has been refined to an R factor of 15.2% against diffrac…
The spreading of a drop of viscous fluid on a horizontal surface by capillarity has been studied by a number of authors. Different hypotheses have been advanced for the crucial questions of the contact angle at the moving rim of the drop. It is argued that there is one model that agrees with experiments and is economi…