Materials Literature
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Abstract An investigation was conducted to establish property‐morphology relationships in polymethylmethacrylate/polyvinylidenefluoride (PMMA/PVDF) blends. All blends were compounded in a twin‐screw extruder and then processed by injection molding Mechanical properties of blends of various compositions were studied by…
It is demonstrated that the observed production by ultrasound of stable cavitation bubbles in tissues, at the frequency and intensities used by ter Haar and Daniels, (see ibid., vol. 26, p.1145-9, 1981), can be predicted on the basis of a presently available theory concerning the growth of bubbles by rectified diffusi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, structure, and properties of [Co8S6(SC6H5)8]4-, containing an octanuclear Co8S6 rhombic dodecahedron related to that of cobalt pentlanditeG. Christou, K. S. Hagen, and R. H. HolmCite this: J. Am. Chem. Soc. 1982, 104, 6, 1744–1745Publication Date (Print):March 1,…
A new technique for the characterization of semiconductors, surface photovoltage measured capacitance (SPMC) is introduced. This technique permits the semiconductor surface space-charge capacitance to be determined by simple measurements of the intrinsic surface photovoltage (ISPV) induced by chopped light. ISPV trans…
Magnetic hardening has been examined in the commercial Sm(Co, Fe, Cu, Zr)7.22 permanent magnet by correlating the magnetic properties with the microstructure of the sample. The shape of the initial magnetization curve and magnetic domain observations indicate that there is more than one magnetic hardening process invo…
A procedure is presented for the stereochemically restrained least-squares refinement of macromolecular structures with neutron and X-ray diffraction data from single crystals. This procedure has been tested by refining a model of ribonuclease A using neutron data to minimal spacings of 2.8 Å and X-ray data from withi…
Abstract The crystallization, from molten blends, of polypropylene (PP) and polybutene‐1 (PB), two highly crystallizable, polymers, their interaction in the amorphous phase, and the resulting tensile mechanical properties were studied. The crystallization was followed by DSC, showing two separate PP and PB crystalliza…
The effect of addition of Ti4+ under oxidizing atmosphere on the structural and magnetic properties of Ni0.3Zn0.7Fe2O4 is studied. The results of x-ray diffraction, magnetization, and Arrott plot measurements are reported. The data are analyzed on the basis of a three sublattice Yafet-Kittel model.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVolume dependence of the elastic equation of state. 3. Bulk-cured poly(dimethylsiloxane)R. W. Brotzman and B. E. EichingerCite this: Macromolecules 1982, 15, 2, 531–535Publication Date (Print):March 1, 1982Publication History Published online1 May 2002Published inissue 1 Mar…
Reductive methylation of hen egg-white (HEW) lysozyme with [13C]formaldehyde and NaCNBH3 and subsequent 13C NMR spectroscopy reveal resonances for each of the mono- and dimethyl derivatives of the six lysyl epsilon-amino groups and the NH2 terminus. Each resonance has a unique chemical shift, pKa, and chemical shift c…
Injection of liquid through a catheter into the circulation is known to produce clouds of signals detected by sonography. Blood forced through a stenotic conduit produced sonographic clouding, and bubbles of 10-100 microns were observed were observed by light microscopy. The microbubbles persisted up to three and a ha…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanisms for crystal phase transformations by heat treatment and molecular motion in poly(vinylidene fluoride)Yasuhiro Takahashi, Yoshiaki Matsubara, and Hiroyuki TadokoroCite this: Macromolecules 1982, 15, 2, 334–338Publication Date (Print):March 1, 1982Publication Histor…
Spheres of the metallic glass Au55 Pb22.5 Sb22.5 have been formed up to a size of approximately 1.5 mm in diameter. X-ray diffraction was used to establish the glassy nature of the samples and to provide evidence of two phase-separated glass regions. Scanning electron microscopy provided a direct visual observation of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLow-angle neutron scattering study of the lateral extension of chains in lamellar styrene isoprene block copolymersG. Hadziioannou, C. Picot, A. Skoukios, M. L. Ionescu, A. Mathis, R. Duplessix, Y. Gallot, and J. P. LingelserCite this: Macromolecules 1982, 15, 2, 263–267Publ…
Sodium sulfate‐induced hot corrosion of preoxidized B‐1900 and NASA‐TRW VIA has been studied at 900°C with special emphasis placed on the chemical reactions occurring during and immediately after the induction period. Thermogravimetric tests were run for predetermined periods of time after which one set of samples was…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation C. J. Powell, N. E. Erickson, T. Jach; Summary Abstract: Accurate determination of the energies o…
Modern electrical plant and machinery have to be designed to operate at high power densities at minimum cost and optimal efficiency with a high degree of reliability during operation. These stringent requirements necessitate accurate performance prediction at the design stage. As a first and important step in this pro…
Abstract A set of quantitative mineralogical methods was revised and evaluated for routine and rapid mineralogical characterization of clays from southern soils and sediments. The procedures adopted consist of soil dispersion in a pH 9.5 suspension by ultrasonics, centrifuge fractionation to give 300 mg of clay, K‐ an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRole of inorganic additives in the smoldering combustion of cotton celluloseFred Shafizadeh, Allan G. W. Bradbury, William F. DeGroot, and Thomas W. AanerudCite this: Ind. Eng. Chem. Prod. Res. Dev. 1982, 21, 1, 97–101Publication Date (Print):March 1, 1982Publication History…
The generalized Smoluchowski equation is solved exactly for two particles interacting via a hard core potential in one, two, and three dimensions without the hydrodynamic interaction. From this solution coherent and incoherent intermediate scattering functions, memory functions, and transport coefficients are calculat…