Materials Literature
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Composite films of polypyrrole and or lithiated particles have been synthesized for use as cathode‐active materials of rechargeable lithium batteries. The composite films were prepared by electrolysis of pyrrole dissolved in propylene carbonate solution in the presence, of suspended particles. The maximum amount of th…
Circular braiders can be adapted to make complex shapes by overbraiding a contoured mandrel and adjusting the process parameters, usually by trial and error. To advance this technology, we developed a detailed model of the braiding process. The model relates the shape of the braid to the machine speeds (which can be p…
Abstract This article introduces thermal spray coatings and describes the various types of coating processes and coating devices, including the flame spray, electric-arc spray, plasma spray, transferred plasma arc, high-velocity oxyfuel, and detonation gun. It provides information on the surface preparation methods an…
We determine the characteristic length scale, L(t), in phase-ordering kinetics for both scalar and vector fields, with either shortor l L(t) consistently by comparing the global rate of energy change to the energy dissipation from the local evolution of the order parameter. We derive growth laws for O(n) and other mod…
(1994). Spectrum for the allen-chan, chan-hillard, and phase-field equations for generic interfaces. Communications in Partial Differential Equations: Vol. 19, No. 7-8, pp. 1371-1395.
Electric fatigue is a major obstacle for some potential applications of ferroelectric materials based on reversals of spontaneous polarization, such as memory devices and high strain actuators. Our studies of finegrained hotpressed lead zirconate titanate with lanthanum dopant (PLZT 7/68/32) show that fast fatigue is…
Metal-free phthalocyanines and metal phthalocyaninates (M = Ni, Cu, Co or Zn) carrying eight alkylthio-groups on peripheral positions have been synthesised from 4,5-bis(alkylthio)phthalonitrile and 1,8-diazabicyclo[5.4.0]undec-7-ene (dbu) or the corresponding anhydrous metal salt [NiCl2, CuCl, CoCl2 or Zn(O2CMe)2]. Th…
Now in its second edition, this widely used text provides a unique presentation of today's polymer science. It is both comprehensive and readable. The authors are leading educators in this field with extensive background in industrial and academic polymer research. The text starts with a description of the types of mi…
Doxil® (Stealth® liposomal doxorubicin HCl) Injection is doxorubicin HCl incorporated into long circulating liposomes that contain surface-grafted polyoxyethylene chains. These surface-grafted polymer chains reduce the interaction of the liposomes with the mononuclear phagocytic system, accounting for the long circula…
Hi‐Z Technology, Inc. (Hi‐Z) has been developing a 1 kW thermoelectric generator for class eight Diesel truck engines under U.S. Department of Energy and California Energy Commission funding since 1992. The purpose of this generator is to replace the currently used shaft‐driven alternator by converting part of the was…
Chemical‐bath deposition of ZnS thin films from NH 3 / NH 2 ‐ NH 2 / SC ( NH 2 ) 2 / ZnSO 4 solutions has been studied. The effect of various process parameters on the growth and the film quality is presented. A first approach to a mechanistic interpretation of the chemical process is reported. The structural, optical…
We consider pattern formation during the supercooling solidification of a pure material, using a phase field model. The model gives rise to a rich variety of three-dimensional patterns, including very realistic dendritic crystal forms. We show how the strength of anisotropy has a crucial influence on the shape of crys…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharacterization of hydrogen bonding in cellulose-synthetic polymer blend systems with regioselectively substituted methylcelluloseTetsuo Kondo, Chie Sawatari, R. St. J. Manley, and Derek G. GrayCite this: Macromolecules 1994, 27, 1, 210–215Publication Date (Print):January 1…
Under wet and contaminated conditions dry band arcing occurs on the surface of HV outdoor insulators coated with room temperature vulcanizing (RTV) silicone rubber. The thermal impact of the arcing on the surface of the RTV causes chemical changes. The gradual loss of hydrophobicity due to dry band arcing is of consid…
A magneto-structural relationship showing linear dependence of antiferromagnetic exchange coupling constant (–J) on Ni–O–Ni bridge angle as well as the intramolecular Ni ⋯ Ni distance has been obtained with a series of phenoxy-bridged macrocyclic dinickel(II) complexes with centrosymmetric structures.
Physical behaviour of polymeric foams - an overview. Polyurethane flexible foam formation. Characterization of polymeric cellular structures. The morphology of flexible polyurethane matrix polymers. Heat transfers in foams. Thermal ageing. The elastic behaviour of low density cellular plastics. Hysteresis and energy l…
Electrochemical measurements, x-ray photoelectron spectroscopy, and scanning tunneling microscopy have been used to study the effect of hydrogen peroxide on the passivity of titanium in a phosphate-buffered saline (PBS) solution. The results indicate that the passive film formed in the PBS solution--with and without a…
The amphipathic anthracycline base doxorubicin (DXR) was accumulated in the aqueous phase of the liposomes where it reached a level as high as 100-fold its concentration in the remote loading medium. Most of the intraliposomal DXR was present in an aggregated state. Efficient (>90%) and stable loading into the liposom…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCationic polymerization of glycidol: coexistence of the activated monomer and active chain end mechanismR. Tokar, P. Kubisa, S. Penczek, and A. DworakCite this: Macromolecules 1994, 27, 2, 320–322Publication Date (Print):January 1, 1994Publication History Published online1 M…
Polymer-dispersed liquid crystals (PDLC) are widely used for electro-optic applications such as flexible displays, privacy windows or projection displays. Besides these applications, the confinement of a liquid crystal to small cavities is of fundamental interest. The present paper contains a review of the work on nem…