Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and characterization of cellulose monoacetates: the relationship between structure and water solubilityCharles M. Buchanan, Kevin J. Edgar, and Alan K. WilsonCite this: Macromolecules 1991, 24, 11, 3060–3064Publication Date (Print):May 1, 1991Publication History…
A series of 1,2-phenylene bis[4-(4-alkoxybenzylideneamino)benzoates has been prepared in order to establish that the nonlinear molecular structure is not necessarily incompatible with mesophase formation. The phases appearing in the methoxy and ethoxy derivatives are classical nematic. While the propoxy to octyloxy de…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of cellulose [1-carbon-13]acetates and determination of monomer composition by NMR spectroscopyCharles M. Buchanan, Kevin J. Edgar, John A. Hyatt, and Alan K. WilsonCite this: Macromolecules 1991, 24, 11, 3050–3059Publication Date (Print):May 1, 1991Publication H…
The collapse of a spherical vapour cavity in the vicinity of a compliant boundary is examined numerically. The fluid is treated as a potential flow and a boundary-element method is used to solve Laplace's equation for the velocity potential. Full nonlinear boundary conditions are applied on the surface of the cavity.…
From the compositional dependences of the lattice parameters in the system ${\mathrm{LiV}}_{1\mathrm{\ensuremath{-}}\mathrm{y}}$Cr $_{\mathrm{y}}\mathrm{O}_{2}$, a critical V-V separation ${\mathrm{R}}_{\mathrm{c}}$=2.90\ifmmode\pm\else\textpm\fi{}0.01 \AA{} has been determined for an array of octahedral-site ${\mathr…
Radiation damage in h.c.p. metals is significantly different from that in f.c.c. or b.c.c. metals. In the latter metals, loops that are primarily interstitial in nature simply form on the close-packed planes, {111} for f.c.c. and {110} for b.c.c. The loops may then shear into configurations of lower energy, that is un…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSyntheses of quadruply two- and three-atom, aza-bridged, cofacial bis(5,10,15,20-tetraphenylporphyrins)Brett C. Bookser and Thomas C. BruiceCite this: J. Am. Chem. Soc. 1991, 113, 11, 4208–4218Publication Date (Print):May 1, 1991Publication History Published online1 May 2002…
Twinning is an important plastic deformation mechanism in the response of h.c.p. metals to applied stress, and in the present paper the atomic processes associated with {1011}, {1012}, {1121} and {1122} twinning in Mg are considered. The technique of atomic-scale computer modelling has been used, with atomic interacti…
Density functional theory is used to investigate two of the possible reasons for the discrepancy between theory and experiment for the interfacial width and tension of phase separated binary blends. The two reasons are the inadequacy of the density functionals used previously and the neglect of the composition depende…
A concept is developed and described which allows to measure the heat capacity and the effective thermal conductivity of stable and undercooled liquid metals and alloys in an electromagnetic levitation apparatus. We propose to use an ac pulse heating method which is used nowadays as a standard technique for precision…
The integer topological invariant called the Chern number is calculated for a quasi-one-dimensional conductor in the magnetic-field-induced spin-density-wave state. Due to the nonzero value of the Chern number the Hall conductivity per layer has the quantized value ${\mathrm{\ensuremath{\sigma}}}_{\mathit{x}\mathit{y}…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-field boron-11 magic-angle spinning NMR characterization of boron nitridesPaul S. Marchetti, Daekeun Kwon, Wayde R. Schmidt, Leonard V. Interrante, and Gary E. MacielCite this: Chem. Mater. 1991, 3, 3, 482–486Publication Date (Print):May 1, 1991Publication History Publi…
ADVERTISEMENT RETURN TO ISSUEArticleNEXTPermeability of shellac coatings to gases and water vaporRobert D. Hagenmaier and Philip E. ShawCite this: J. Agric. Food Chem. 1991, 39, 5, 825–829Publication Date (Print):May 1, 1991Publication History Published online1 May 2002Published inissue 1 May 1991https://pubs.acs.org/…
Silicon carbide films were deposited by plasma enhanced chemical vapor deposition utilizing monomethylsilane (CH3SiH3). Silicon (100) and polycrystalline gold were used as substrates. A mass spectrometric analysis of the monomethylsilane plasma showed that the majority of the Si–C bonds were preserved in the gas phase…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCluster of clusters. Structure of a novel gold-silver cluster [(Ph3P)10Au13Ag12Br8](SbF6) containing an exact staggered-eclipsed-staggered metal configuration. Evidence of icosahedral units as building blocksBoon K. Teo, Xiaobo Shi, and Hong ZhangCite this: J. Am. Chem. Soc.…
The effects of nuclear motion on the ground state and excited state optical spectra of porphyrins are examined in a number of experiments designed to generate excess vibrational energy within the macrocycle. These include time-resolved spectroscopic measurements following ultrafast radiationless transitions, and stati…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA model for intermolecular cooperativity in conformational relaxations near the glass transitionS. Matsuoka and X. QuanCite this: Macromolecules 1991, 24, 10, 2770–2779Publication Date (Print):May 1, 1991Publication History Published online1 May 2002Published inissue 1 May 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSite-specific reversible scission of hydrogen bonds in polymers: an investigation of polyamides and their Lewis acid-base complexes by infrared spectroscopyMichael F. Roberts and Samson A. JenekheCite this: Macromolecules 1991, 24, 11, 3142–3146Publication Date (Print):May 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA reexamination of the chemisorption of trimethylaluminum on silicaM. E. Bartram, T. A. Michalske, and J. W. Rogers Jr.Cite this: J. Phys. Chem. 1991, 95, 11, 4453–4463Publication Date (Print):May 1, 1991Publication History Published online1 May 2002Published inissue 1 May 1…
Rates of thermal decomposition and solvent rate effects have been measured for a series of nitrate esters. The alkoxy radicals formed by homolysis together with some of their further degradation products have been stabilized by hydrogen donation. Internal and external return of nitrogen dioxide has been demonstrated b…