Materials Literature
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Abstract In cast film extrusion, the polymer melt is extruded through a slit die, slightly stretched in air and then cooled on a chill-roll. An important part of the present work was devoted to the development and application of a thermomechanical model of stretching in air and of a purely thermal model of cooling on…
Abstract α,ω‐Dihydroxy‐terminated‐PMMA was synthesized by the bulk polymerization of methyl methacrylate in the presence of a functional “iniferter,” viz., N , N ′‐diethyl‐ N , N ′‐bis(2‐hydroxyethyl)thiuram disulfide (DHTD). The kinetics of the polymerization were studied by determining the polymerization rate as a f…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDonor-acceptor properties of ambient-temperature chloroaluminate meltsThomas A. Zawodzinski Jr. and Robert A. OsteryoungCite this: Inorg. Chem. 1989, 28, 9, 1710–1715Publication Date (Print):May 1, 1989Publication History Published online1 May 2002Published inissue 1 May 198…
The purpose of this study was to relate changes in collagen composition with the mechanical properties of aortas of spontaneously hypertensive rats (SHRs). SHRs and normal Wistar-Kyoto (WKY) rats were killed at ages 6 and 20 weeks, and their aortas were removed. A portion of each aorta was used for determination of pa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeterobimetallic gold-palladium phosphine cluster complexes. X-ray crystal and molecular structure of [Au8Pd(PPh3)8](NO3)2Larry N. Ito, Brian J. Johnson, Ann M. Mueting, and Louis H. PignoletCite this: Inorg. Chem. 1989, 28, 11, 2026–2028Publication Date (Print):May 1, 1989P…
Aluminum anodization has been studied in the basic ambient temperature molten salt . The anodization process was studied as a function of chloride anion concentration. Two different anodization processes are observed with onset potentials of approximately −1.1 and 0 V. The more cathodic anodization involves formation…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTotal synthesis of K-13Dale L. Boger and Daniel YohannesCite this: J. Org. Chem. 1989, 54, 11, 2498–2502Publication Date (Print):May 1, 1989Publication History Published online1 May 2002Published inissue 1 May 1989https://doi.org/10.1021/jo00272a003RIGHTS & PERMISSIONSArticl…
An experimental investigation of phenomena associated with the oblique hypervelocity impact of spherical projectile on multisheet aluminum structures is described. A model that can be employed in the design of meteoroid and space debris protection systems for space structures is developed. The model consists of equati…
A comparison is made of two different approaches to the description of phase transitions in the ${A}_{2}$${\mathrm{BX}}_{4}$ structure (space group ${D}_{4h}^{17}$, I4/mmm) due to rigid octahedral tiltings. The lower-symmetry subgroups due to coupling of the ${K}_{13}$\ensuremath{\tau}^ $^{7}$ (${X}_{2}^{+}$) and ${K}…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAn off-lattice constant-pressure simulation of liquid polymethyleneRichard H. BoydCite this: Macromolecules 1989, 22, 5, 2477–2481Publication Date (Print):May 1, 1989Publication History Published online1 May 2002Published inissue 1 May 1989https://pubs.acs.org/doi/10.1021/ma…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolid-state and solution stability of poly(anhydrides) and poly(esters)Abraham J. Domb and Robert LangerCite this: Macromolecules 1989, 22, 5, 2117–2122Publication Date (Print):May 1, 1989Publication History Published online1 May 2002Published inissue 1 May 1989https://pubs.…
Sintered, polycrystalline ZnO ceramics with copper as the only additive exhibit highly nonlinear current-voltage characteristics. Increasing nonlinearity index (α=4–45) with Cu concentration of 0.01–1 mol % is also variable with respect to ceramic processing methods. Incorporation of Cu in the ZnO lattice is indicated…
Quenching and annealing studies have been carried out to investigate the effects of the A-site occupancy in the tungsten bronze structure on the polarization, pyroelectric coefficient, dielectric permittivity, and phase transition (Curie temperature range) behavior of ferroelectric relaxor Sr1−xBa x Nb2O6 (1−x = 0.75,…
Sinter‐forging types of experiments were carried out on powder compacts of glass. The shear and densification strains were measured simultaneously during the forging process. This information was analyzed to obtain the shear viscosity of the glass and the intrinsic sintering pressure, both as a function of density. Th…
The tensile strength of skin is associated, in part, with its potential for laceration from impact. The quasi-static tensile strength of skin depends on orientation. The objective of this study was to determine whether the strength of skin in high speed tensile failure experiments exhibits a similar dependence on orie…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChelating ability of poly(vinylamine): effects of polyamine structure on chelationShiro Kobayashi, Kyung Do Suh, and Yukio ShirokuraCite this: Macromolecules 1989, 22, 5, 2363–2366Publication Date (Print):May 1, 1989Publication History Published online1 May 2002Published ini…
Dielectric and piezoelectric properties of relaxor ferroelectrics in the solid solution, formulated (1−x)(Pb1–1.5yLay)(Mg1/3Nb2/3)—x PbTiO3, have been investigated. The dielectric properties show typical first order ferroelectric behavior for PT ≥ 35% and relaxor type below being indicative of the morphotropic phase b…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPentaammineruthenium(III) complexes of neutral and anionic (2,3-dichlorophenyl)cyanamide: a spectroscopic analysis of ligand to metal charge-transfer spectraRobert J. Crutchley and Mark L. NaklickiCite this: Inorg. Chem. 1989, 28, 10, 1955–1958Publication Date (Print):May 1,…
Under specific conditions, ceramics can be deposited from gaseous precursors within porous substrates. This technique, referred to as chemical vapor infiltration (CVI) is particularly suited to the preparation of ceramic matrix composites (CMC). Pore filling by CVI results from two simultaneous phenomena : (i) a surfa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNickel-aluminum alloy as a reducing agentLarry K. Keefer and George LunnCite this: Chem. Rev. 1989, 89, 3, 459–502Publication Date (Print):May 1, 1989Publication History Published online1 May 2002Published inissue 1 May 1989https://pubs.acs.org/doi/10.1021/cr00093a002https:/…