Materials Literature
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A novel method of preparing low-density microporous polymeric foam materials has been utilised to produce media which are effective in crossflow microfiltration applications. Polyhipe polymer (PHP) is produced by the polymerisation of a high-internal-phase emulsion (HIPE), resulting in a homogeneous, highly porous, lo…
A constitutive equation for a planar fiber network under transverse compression is derived allowing for an in-plane fiber orientation distribution. The fibers are assumed to be well dispersed in space and to have a large aspect ratio and uniform diameter. A compression experiment, performed on a glass-fiber network ob…
This communication describes our results using these novel alkoxysilane precursors for PECVD of SiO_2 films in an inductively coupled rf plasma reactor. The effects of deposition time, rf power, and organosilane pressure on the films’ characteristics are described.
Lanthanum-modified lead zirconate titanate (PLZT) specimens with La contents x between 0 and 5 at. % and a Zr/Ti ratio of 95/5 (PLZT x/95/5) have been investigated by dielectric spectroscopy, Sawyer-Tower polarization (P-E) measurements, and hot-stage transmission electron microscopy (TEM). The dominate phase of PLZT…
Experimental results on the dynamics of a beam constrained by shape memory wires are presented. It is observed that the damping increases significantly when the shape memory wires are stressed such that they lie within the pseudoelastic hysteresis loop. Theoretical models of the inner hysteresis loop are considered, a…
The poles and zeros of the scattering operator of a corrugated waveguide and of a bare grating are studied mathematically and numerically. An initial tutorial section recalls how their use can explain grating anomalies and other curious phenomena in linear optics. This approach is then used in nonlinear optics to unde…
A new computer simulation technique for modeling morphological pattern formation during nucleation, growth, and coarsening of coherent misfitting particles is developed. Microstructure evolution during precipitation of tetragonal phase from Mg‐partially‐stabilized cubic zirconia is investigated. Our computer simulatio…
The photoionization of ${\mathrm{Ti}}^{3+}$ in sapphire \ensuremath{\alpha}-${\mathrm{Al}}_{2}$${\mathrm{O}}_{3}$ was studied by means of one-step and two-step photoconductivity measurements. An absorption band of ${\mathrm{Ti}}^{3+}$ at 2700 \AA{} was shown to be due to a ${\mathrm{Ti}}^{3+}$ localized exciton. One-p…
This 3rd edition of High Voltage Engineering Testing describes strategic developments in the field and reflects on how they can best be managed. All the key components of high voltage and distribution systems are covered including electric power networks, UHV and HV. Distribution systems including HVDC and power elect…
Melamine has shown broad utility as a flame retardant in plastics although its commercial use to date as a flame retardant additive has been principally in coatings and flexible urethane foams. Its mode of action appears to involve endothermic sublimation and vapor-phase dissociation, but it also undergoes conversion…
A developed strict kinetic model for the growth of porous anodic films was employed to the experimental results obtained at different bath temperatures and current densities of Al anodization. Treatment of the values of parameters involved in the kinetic equation showed that the pore/cell surface density depends only…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStabilization of NiO(111) Thin Films by Surface HydroxylsM. A. Langell and M. H. NassirCite this: J. Phys. Chem. 1995, 99, 12, 4162–4169Publication Date (Print):March 1, 1995Publication History Published online1 May 2002Published inissue 1 March 1995https://pubs.acs.org/doi/…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAbsorption, Adsorption, and Desorption Studies of the Oxygen/Rh(111) System Using O2, NO, and NO2Kevin A. Peterlinz and Steven J. SibenerCite this: J. Phys. Chem. 1995, 99, 9, 2817–2825Publication Date (Print):March 1, 1995Publication History Published online1 May 2002Publis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDynamic Light Scattering and Dynamic Viscoelasticity of Poly(vinyl alcohol) in Aqueous Borax Solutions. 1. Concentration EffectAkihiro Koike, Norio Nemoto, Tadashi Inoue, and Kunihiro OsakiCite this: Macromolecules 1995, 28, 7, 2339–2344Publication Date (Print):March 1, 1995…
The recombinant CelS (rCelS), the most abundant catalytic subunit of the Clostridium thermocellum cellulosome, displayed typical exoglucanase characteristics, including (i) a preference for amorphous or crystalline cellulose over carboxymethyl cellulose, (ii) an inability to reduce the viscosity of a carboxymethyl cel…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-Temperature Chemical and Microstructural Transformations of a Nanocomposite OrganoceramicPhillip B. Messersmith and Samuel I. StuppCite this: Chem. Mater. 1995, 7, 3, 454–460Publication Date (Print):March 1, 1995Publication History Published online1 May 2002Published in…
This work discusses the results of a self-consistent-field calculation of conformational and thermodynamic properties of polymers end-grafted to a surface in athermal solvents. Three primary issues are addressed. First, we address the question raised recently by Carignano and Szleifer as to whether the second virial t…
Polyanilines are particularly flexible family of electronic polymers. There are three insulating forms; one of which, pernigraniline base, sustains soliton excitations with very unusual properties due to the key role of ring-torsion angle alternation in additon to bond length dimerization. Protonation of the emeraldin…
The viscous Cahn-Hilliard equation arises as a singular limit of the phase-field model of phase transitions. It contains both the Cahn-Hilliard and Allen-Cahn equations as particular limits. The equation is in gradient form and possesses a compact global attractor A, comprising heteroclinic orbits between equilibria.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Free Volume Distribution Model of Gas Sorption and Dilation in Glassy PolymersS. S. Jordan and W. J. KorosCite this: Macromolecules 1995, 28, 7, 2228–2235Publication Date (Print):March 1, 1995Publication History Published online1 May 2002Published inissue 1 March 1995https…