Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEstimation of measurement error variances from process dataGedeon A. Almasy and Richard S. H. MahCite this: Ind. Eng. Chem. Process Des. Dev. 1984, 23, 4, 779–784Publication Date (Print):October 1, 1984Publication History Published online1 May 2002Published inissue 1 October…
Tension-torsion tests with a computer controlled servohydraulic testing machine are reported. Yield surfaces were obtained during a load controlled path, which includes combined stress creep, as well as during a strain controlled path, which includes combined stress relaxation. These surfaces and their relation to the…
The optical and near infrared absorption of dilute Tm3+ and Yb3+ impurities in YPO4 and LuPO4 single crystals have been measured at liquid helium and nitrogen temperatures. For Tm3+, the spectral region from 5 000 to 38 000 cm−1 was examined and Zeeman spectra were obtained in the visible region. The observed transiti…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolvent effects in polyelectrolyte solutions. 1. Potentiometric and viscosimetric titration of poly(acrylic acid) in methanol and counterion specificityNicolaas T. M. Klooster, Frans Van der Touw, and Michel MandelCite this: Macromolecules 1984, 17, 10, 2070–2078Publication…
The stationary state of a phenomenological model of two-dimensional nucleation-controlled crystal growth is found, using an operator formalism akin to quantum field theory, and the implications for the growth of polymer crystals are briefly discussed. The method also enables a correspondence to be drawn between this p…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTControl of spin state in (porphinato)iron(III) complexes. An axial ligand orientation effect on the spin state in bis(2-methylimidazole)(octaethylporphinato)iron(III) perchlorateDavid K. Geiger, Young Ja Lee, and W. Robert ScheidtCite this: J. Am. Chem. Soc. 1984, 106, 21, 6…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
X-ray absorption spectra about the K edges of Ni, Cu and Ti have been measured at the Stanford Synchrotron Radiation Laboratory. The imaginary part of the atomic scattering factor f ′′ was determined using the optical theorem and the real part f ′ computed by the Kramers–Kronig dispersion relation. Methods for evaluat…
Abstract The ASTM E‐42 committee round robin on XPS measurements found, in a simple survey, that the intensity‐energy response of electron spectrometers was unacceptably unreliable. In this paper new, high accuracy, reference procedures are developed to define the relative intensity‐energy response function of spectro…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
Abstract Change in yield and deformation associated with physical aging was studied on a series of polycarbonates (bisphenol‐A polycarbonate, polyestercarbonates, and phenolphthalein‐bisphenol‐A copolycarbonates) and a polysulfone. A combination of tensile and biaxial yield measurements, dynamical mechanical analysis,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and DNA binding and photonicking properties of acridine orange linked by a polymethylene tether to (1,2-diaminoethane)dichloroplatinum(II)Bruce E. Bowler, L. Steven Hollis, and Stephen J. LippardCite this: J. Am. Chem. Soc. 1984, 106, 20, 6102–6104Publication Date…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPyridinium molybdates. Synthesis and structure of an octamolybdate containing coordinately bound pyridine: [(C5H5N)2Mo8O26]4-E. M. McCarron III, J. F. Whitney, and D. B. ChaseCite this: Inorg. Chem. 1984, 23, 21, 3275–3280Publication Date (Print):October 1, 1984Publication H…
Abstract Cylindrical specimens of poly(methyl methacrylate) ( PMMA ) were quenched from above the glass transition and subsequently tested in torsion. Torque and normal‐force relaxation responses were recorded simultaneously. The experiments were performed at 40, 60, and 80°C, at increasing aging times and at deformat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface-enhanced Raman scattering from copper and zinc phthalocyanine complexes by silver and indium island filmsCarol. Jennings, Ricardo. Aroca, Ah Mee. Hor, and Rafik O. LoutfyCite this: Anal. Chem. 1984, 56, 12, 2033–2035Publication Date (Print):October 1, 1984Publication…
Abstract The kinetics of isothermal crystallization of polymer blends in which the matrix is a crystallizable polymer is considered. It is shown that depending on the difference in interfacial energies the inclusions are rejected or engulfed by the growing spherulite. Other factors influencing rejection, engulfing, an…
The adsorption of the cationic dye rhodamine 6G by montmorillonite (Wyoming bentonite) and laponite (synthetic hectorite) was studied by visible and fluorescent spectroscopy and by X-ray diffraction methods. Adsorption of the dye takes place by the mechanism of cation exchange. X-ray data indicate that the adsorbed ca…
The photodarkening effect in evaporated As2S3 films has been studied. Optical transmissivity was measured and its dependence on intensity, wavelength, temperature and previous thermal history was found. A structural investigation was also made using Raman spectroscopy. A feature at 231 cm−1 in the Raman spectra, which…
The scanning electron microscope (SEM) is usually operated with a beam voltage, V0, in the range of 10-30 kV, even though many early workers had suggested the use of lower voltages to increase topographic contrast and to reduce specimen charging and beam damage. The chief reason for this contradiction is poor instrume…
Abstract The kinetics of phase segregation of segmented linear polyurethanes, from a homogeneous single‐phase system into a two‐phase one, have been studied by measuring the heat capacity change at the glass transition of the soft phase. The extent of phase segregation at equilibrium is a linear function of the Flory–…