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In the original paper (see ibid., vol. 1, no. 1, p. 153-9, 1994), the authors show that the two-parameter Weibull distribution is satisfactory to represent the results on samples of HV thermally aged EPR cables. This does not exclude, as well as they indicate it, that the three-parameter Weibull distribution is someti…
The influence of small ruthenium additions on the corrosion behavior of high-chromium duplex stainless steels (DSS) was studied. Ruthenium additions (≤ 0.28%) increased the corrosion resistance of the base alloy by simultaneously improving hydrogen evolution efficiency and inhibiting anodic dissolution. The corrosion…
Other| April 01, 1995 The crystal structure of gillulyite, Tl2(As,Sb)8S13, from the Mercur gold deposit, Tooele County, Utah, U.S.A. Franklin F. Foit; Franklin F. Foit Washington State University, Department of Geology, Pullman, WA, United States Search for other works by this author on: GSW Google Scholar Paul D. Rob…
The concentration dependence of the orientational order parameter of acetic acid dissolved in nematic solvents has been generated by computer simulation on the basis of an equilibrium model for liquid crystalline solutions containing non-mesogenic solutes. Comparison of this predicted dependence with experiment allows…
Abstract Thermogravimetric analysis (TGA) at constant temperature was used to measure weight loss of plasticized nitrocellulose (NC) propellants due to vaporization of plasticizer. Plasticizers consisted of three 2‐nitroxyethylnitramine (NENA) compounds, diethylene glycol dinitrate (DEGDN), and nitroglycerin (NG). Ini…
The thermoelastic martensitic transformation and the stress-strain behaviour associated with the transformation in manganese-rich Mn-Cu alloys have been examined by tensile testing using single crystals grown by the Bridgman method. In the case of the deformation below the martensitic transformation temperature, twinn…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal Decomposition of NF3 by Ti, Si, and Sn PowdersElizabeth Vileno, Michael K. LeClair, Steven L. Suib, Michael B. Cutlip, Francis S. Galasso, and Steven J. HardwickCite this: Chem. Mater. 1995, 7, 4, 683–687Publication Date (Print):April 1, 1995Publication History Publi…
Other| April 01, 1995 Palladium oxide equilibration and the thermodynamic properties of MgAl2O4 spinel Laurinda Chamberlin; Laurinda Chamberlin California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States Search for other works by this author on: GSW Google Scholar Joh…
Abstract For a triplet competitive‐consecutive halogenation sequence forming mono‐, di‐ and trihalogenated products of the form, A + B → R + B → S + B → T, under semibatch operation adding B to A, if perfect mixing could be assumed at all scales, the product distribution would be unchanged on scaling up. However, if t…
Abstract The influence of the crown ether concentration on the reaction rate constants and the equilibrium constant in anionic (butoxymethyl)oxirane polymerization was studied. Polymerizations of (phenoxymethyl)oxirane and (2‐(9‐carbazoyl)ethoxymethyl)oxirane were carried out for the sake of comparison. The observed c…
For several reasons, biodegradable polymers have recently attracted much public and industrial interest. This contribution focuses on microbial aspects of the biodegradability of polymeric materials in the environment. It provides an overview on biodegradability and the mechanisms of degradation of relevant natural an…
Abstract Different grades of impact‐modified polystyrene were studied by viscometry, tensile impact test and colour change upon exposure to polychromatic irradiation at 55°C in air. The samples underwent extensive reduction in intrinsic viscosity [η] and tensile impact strength, and yellowed upon polychromatic irradia…
Abstract —The charge of the expandable interlayers in a series of fourteen diagenetic illite/smectites (I/S) from lower Paleozoic K-bentonites was determined by the alkylammonium ion exchange method. The magnitude (<0.50 equivalents per half formula unit) and characteristic heterogeneous distribution of interlayer…
Abstract Many fundamental questions for the understanding of polymer networks are more suitably addressed by current computer simulations than by experiments. Details of the microscopic topology, such as the elastically active cluster or loop entanglements, can be identified as well as controlled. In particular, it is…
The recycling of biodegradable thermoplastics such as ZENECA's BIOPOL range of poly-3-hydroxybutyrate and poly-3-hydroxyvalerate copolymers needs to be considered in terms of both material recycling and organic recycling by composting. BIOPOL can be recycled as regrind. The addition of BIOPOL to a model waste stream d…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTModular High-Tg Second-Order Polymeric Nonlinear Optical Materials. Polyfunctional Epoxide and Diisocyanate Cross-Linked Chromophoric PolyhydroxystyrenesEric T. Crumpler, Jennifer L. Reznichenko, Dequan Li, Tobin J. Marks, Weiping Lin, Paul M. Lundquist, and George K. WongCi…
Poly(3-hydroxybutyrate) [P(3HB)] was produced by Alcaligenes eutrophus from fructose or butyric acid in nitrogen-free media at different pHs and temperatures, and the time-dependent changes in the molecular weight of P(3HB) were studied. P(3HB) polymers were accumulated within cells in the presence of a carbon source,…
Edwin E. Budzinski, Jean D. Dawidzik, John C. Wallace, Harold G. Freund, Harold C. Box, The Radiation Chemistry of d(CpGpTpA) in the Presence of Oxygen, Radiation Research, Vol. 142, No. 1 (Apr., 1995), pp. 107-109
Double hysteresis loops have been observed in ferroelectric lead zirconate titanate ceramics with a Zr/Ti ratio of 65/35 (PZT 65/35). In addition, dielectric dispersion was found near 50 °C, corresponding to the high-temperature to low-temperature rhombohedral ferroelectric [FER(HT)-FER(LT)] transformation. Structural…
A chain of N monomers is attached to a small colloïdal particle, and is pulled (at a velocity V) inside a polymer melt (chemically identical, with P monomers per chain). The main parameter for this problem is the number X(V) of P chains entangled with the (N) chain. Earlier estimates of X are criticized, and a new for…