Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSoluble Polyimides with Polyalicyclic Structure. 4. Colorless Polyimides from Bicyclo[2.2.1]heptane-2-endo,3-endo,5-exo,6-exo-tetracarboxylic 2,3:5,6-DianhydrideToshihiko Matsumoto and Toshikazu KurosakiCite this: Macromolecules 1995, 28, 16, 5684–5685Publication Date (Print…
The existence of low-frequency, almost dispersionless intrinsic resonant vibrational modes in a transition layer at clean interface between two media (a rigid and a soft crystal) with very different elastic properties is predicted. It is shown that nonlinear interaction of bulk acoustic phonons with fluctuation resona…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, Characterization, and in Vitro Degradation of a Novel Thermotropic Ternary Copolyester Based on p-Hydroxybenzoic Acid, Glycolic Acid, and p-Hydroxycinnamic AcidXiaoming Jin, Cosimo Carfagna, Luigi Nicolais, and Rosa LanzettaCite this: Macromolecules 1995, 28, 14,…
Abstract The structure of cellulose is investigated using a recently derived force field. Published experimental data is taken only as a starting point for purely theoretical investigations. The reliability of the method is validated by calculating physical properties of the obtained geometries. In the course of the i…
Recombinant Escherichia coli fadR atoC(Con) mutants containing the polyhydroxyalkanoate (PHA) biosynthesis genes from Alcaligenes eutrophus are able to incorporate significant levels of 3-hydroxyvalerate (3HV) into the copolymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(3HB-co-3HV)]. We have used E. coli fadR (F…
This paper will examine some of the changes that have occurred in epoxy resins and their chemistry and will explore the effect of these changes on electrical insulation. The intent is to present the chemistry in a fashion that will aid insulation designers in compiling their systems and manufacturing processes and wil…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTn-Alkyl Group-Substituted Poly(m-aniline)s: Syntheses and Magnetic PropertiesAkihiro Ito, Ken-ichi Ota, Kazuyoshi Tanaka, Tokio Yamabe, and Kazunari YoshizawaCite this: Macromolecules 1995, 28, 16, 5618–5625Publication Date (Print):July 1, 1995Publication History Published o…
The etching process of polycrystalline tin‐doped indium oxide (ITO) films in HCl solutions is investigated by kinetic and electrochemical experiments and the patterning characteristics are examined by scanning electron microscopy. The influence of oxidizing agents on the etching behavior is studied. A model is propose…
The different corrosion products formed on zinc specimens (pure or industrially electrodeposited) during exposure to solutions containing two concentrations of chloride were identified by Raman spectroscopy; the crystallographic nature of these products was checked by x‐ray diffraction and their morphology was describ…
Tire pyrolysis kinetics was investigated to explore an economically viable design for the pyrolysis process. Derivative thermogravimetry (DTG) and thermogravimetric analysis (TGA) were found to provide valuable information on pyrolysis kinetics and mechanisms of a heterogeneous compound like scrap tire rubbers. Kineti…
Void fraction measurement tests for BWR fuel assemblies have been conducted as part of a Japanese national project. The aim was to verify the current BWR void fraction prediction method. Void fraction was measured using an X-ray CT scanner. This paper describes typical results of void fraction distribution measurement…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRedox Switching of Anthracene Fluorescence through the CuII/CuI CoupleGiancarlo De Santis, Luigi Fabbrizzi, Maurizio Licchelli, Carlo Mangano, and Donatella SacchiCite this: Inorg. Chem. 1995, 34, 14, 3581–3582Publication Date (Print):July 1, 1995Publication History Publishe…
The widths and overall profiles of dielectric grating lines can be determined by measuring the intensity of diffracted laser light from the sample over a specified range of incident beam angles. This technique, known as 2-Θ scatterometry, is able to accurately and precisely measure photoresist structures in the subhal…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Diffused-Constraint Theory for the Elasticity of Amorphous Polymer Networks. 1. Fundamentals and Stress-Strain Isotherms in ElongationAndrzej Kloczkowski, James E. Mark, and Burak ErmanCite this: Macromolecules 1995, 28, 14, 5089–5096Publication Date (Print):July 1, 1995Pu…
All articles of this category A five-step general synthesis of 3,4-dialkoxypyrroles 7c-f is described starting with the condensation of dimethyl N -benzyliminodiacetate (1b) and diethyl oxalate to give dimethyl 1-benzyl-3,4-dihydroxypyrrole-2,5-dicarboxylate (2b) , which is bis- O -alkylated to the corresponding 3,4-d…
The microstructures of several commercial refractory bricks have been characterized using scanning and transmission electron microscopy. The “direct bond” is shown to be direct at the level of resolution attainable (∼0.3 nm), and a significant number of such direct contacts occur between non‐silicate phases in the mic…
Abstract Double yields, as well as other complex yielding behavior, that are observed during the tensile deformation of the polyethylenes have been studied in a systematic manner. The conditions under which such yielding is observed were established by studying a set of linear polyethylenes and well‐characterized ethy…
The new application of pulsed electroacoustic (PEA) method to measure space charge profiles in several millimeters thick polymers such as power transmission cable was proposed. In this method, space charge profiles are detected as acoustic wave signals that are generated by the space charge profiles existing in the sa…
In power systems with appreciable resistance, the transformers already connected to the supply system can experience unexpected saturation during the inrush transient of an incoming transformer. This saturation, which is established by the asymmetrical voltage drop across the system resistance caused by the inrush cur…
Sonic cleaning is a commonly used technique for removal of particles from surfaces. The theory of particle removal using ultrasound is reviewed. Effects of cavitation and acoustic streaming are discussed. Experimental results using ultrasonics and megasonics (ultrasonic cleaning near 1 MHz) from the literature are rev…