Materials Literature
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Arrhenius plots are useful in predicting long-term use temperatures of organic materials and in choosing parameters for accelerated aging. For materials and components without established Arrhenius curves, a conservative value for the slope of the curve (which is also a measure of the activation energy of degradation)…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSite-dependent vibronic line widths and relaxation in the mixed molecular crystal pentacene in p-terphenylR. W. Olson and M. D. FayerCite this: J. Phys. Chem. 1980, 84, 16, 2001–2004Publication Date (Print):August 1, 1980Publication History Published online1 May 2002Publishe…
Magnetoelectric experiments provide information on spin configurations, critical indices and microscopic ionic interactions. The basic theory of the magnetoelectric effect in antiferromagnets is rederived in this article and extended to situations in which there is an external magnetic field including the spin-flop ph…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPeroxo complexes of molybdenum and tungsten stabilized by oxides of amines, phosphines, and arsines. Stability studiesAlan D. Westland, Ferial Haque, and Jean Marc BouchardCite this: Inorg. Chem. 1980, 19, 8, 2255–2259Publication Date (Print):August 1, 1980Publication Histor…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structure analyses of Rh2(bridge)4(BPh4)2.CH3CN and Rh2(TM4-bridge)4(PF6)2.2CH3CN. Further electronic spectral studies of binuclear rhodium(I) isocyanide complexesKent R. Mann, John A. Thich, Robert A. Bell, Catherine L. Coyle, and Harry B. GrayCite this: Inorg. Chem…
Abstract Infrared (IR) spectroscopy was used to study molecular deformation processes in polymers as a function of stress, strain, time and temperature. Stress‐induced frequency shifts were found to depend on temperature and morphology. Deformation of viscoelastic polypropylene was examined in terms of time dependent…
Abstract— Two examples of a new class of compounds, polyenes covalently linked to meso‐ tetraarylporphyrins, have been prepared. Optical studies revealed that energy transfer from a 26 π electron polyene moiety to the porphyrin was zero, whereas energy transfer efficiency from a polyene containing 18 π electrons was ˜…
The fluorescence excitation spectrum of free base phthalocyanine was observed in a supersonic free jet. The spectrum was very intense, and the cooling provided by the supersonic expansion produced a very well-resolved spectrum showing extensive vibrational structure. This is the first time that vibrational structure h…
For many years, study of the defect state of oxide crystals was overshadowed by activity in the alkali halides. However, during the last decade, work on oxides has emerged as an important field of study in its. own right. This burgeoning of interest came about for many reasons. First the properties of defects in the a…
A new type of highly stabilized GaAs FET oscillator using a dielectric resonator and a stabilization resistor in the feedback circuit has been developed. The oscillator fabricated with a microwave integrated circuit has a high external quality factor Q/sub ex/ for more than1000 with no hysteresis phenomena. The microw…
ADVERTISEMENT RETURN TO ISSUEPREVArticleRecent developments in ultraorientation of polyethylene by solid-state extrusionAnagnostis E. Zachariades, W. T. Mead, and Roger S. PorterCite this: Chem. Rev. 1980, 80, 4, 351–364Publication Date (Print):August 1, 1980Publication History Published online1 May 2002Published inis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA three-carbon condensative expansion. Application to musconeBarry M. Trost and John E. VincentCite this: J. Am. Chem. Soc. 1980, 102, 17, 5680–5683Publication Date (Print):August 1, 1980Publication History Published online1 May 2002Published inissue 1 August 1980https://pub…
We report a refinement of the original Bell–Dean model for vitreous silica using an energy minimization technique with a Keating force-field. Atomic coordinates are obtained for structures with several values of the oxygen bond angle in the range 130–160°. Values of the density, heat of crystallization, X-ray and neut…
ADVERTISEMENT RETURN TO ISSUEPREVArticleA van der Waals picture of the isotropic-nematic liquid crystal phase transitionWilliam M. Gelbart and Boris BarboyCite this: Acc. Chem. Res. 1980, 13, 8, 290–296Publication Date (Print):August 1, 1980Publication History Published online1 May 2002Published inissue 1 August 1980h…
Abstract Mixtures in various proportions of natural rubber (NR) and each of two tackifier resins, a poly‐β‐pinene and a modified pentaerythritol rosin ester, were used as the adhesive layer in joining a flexible polyester strip to a plane glass substrate. Measurements of the force required to peel the strip from the g…
Models are presented for the successive stages of aggregation and recombination of radiation‐induced defects in alkali halides. The construction of our models is assisted by the calculation of defect energies. We concentrate on three main areas: firstly, we consider initial aggregation of H centres, where we propose t…
Organometallic chemical vapor deposition of ZnO on sapphire, using the reaction of diethylzinc with H 2 O / H 2 , N 2 O / N 2 , and CO 2 / H 2 oxidizing gas systems, has been studied. Epitaxial films have been achieved at temperatures of 400° and 730°C, respectively, in the first two systems. The films have been chara…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAn electrode modified with polymer-bound dopamine which catalyzes NADH oxidationChantal Degrand and Larry L. MillerCite this: J. Am. Chem. Soc. 1980, 102, 18, 5728–5732Publication Date (Print):August 1, 1980Publication History Published online1 May 2002Published inissue 1 Au…
The Raman spectrum of SbCl3 is studied as a function of the temperature from 20°C to 85°C both in the solid and in the liquid state. In particular the evolution of the spectra is observed near and through the solid-liquid transition. Measurements are also performed in the liquid state, under the melting temperature (s…
Abstract Es wurde der Einfluss des Wassers auf das Korrosions‐verhalten von reinem Eisen, Zink, Aluminium und gewöhnlichem 18/9 CrNi‐Stahl in HCl‐haltigem Methanol untersucht. Die Aufnahme von potentiodynamischen Stromdichte‐Potential‐Kurven und die Immersionsversuche erfolgten bei 20°C und unter Ausschluss von Sauers…