Materials Literature
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Article Rheological and Calorimetric Characterization of an Epoxy System Cured in Presence of a Reactive Polyethersulphone was published on May 1, 2000 in the journal Journal of Polymer Engineering (volume 20, issue 3).
The Raman spectra of boron doped homoepitaxial diamond particles are investigated. The low frequency parts of the Raman scattering spectra of (100) and (111) growth sectors are very different in peak numbers and in peak positions. (100) facet has three broad bands centered at 580, 920 and 1020 cm -1 , (111) facet has…
Phosphor imaging plate technology has made it possible to directly image the distribution of primary beam electrons and scattered electrons in the environmental scanning electron microscope. The phosphor plate is exposed under electron scattering conditions in the microscope chamber. When processed, the electron inten…
Nanocrystalline exchange coupled Pr11.76Fe82.36B5.88 single-phase and Pr9Fe85B6 two-phase magnets containing 20 vol % α-Fe were produced using mechanical alloying. Micromagnetic finite element simulations were used to analyze the temperature dependence of the magnetic properties. In the single-phase exchange-coupled m…
Rapidly solidified Sm11Fe89 was observed to form partially ordered Sm2Fe17. The ordering increased systematically with annealing temperature, reaching an order parameter of 0.8 after annealing at 950 °C for 15 min. The coercivity of the corresponding interstitial compound Sm2Fe17Nx varied with annealing temperature an…
Abstract Nanomaterials have attracted a great deal of research interest recently. The small size of nanostructures constrains the applications of well-established testing and measurement techniques, thus new methods and approaches must be developed for quantitative measurement of the properties of individual nanostruc…
Abstract The degradation of a new thermoplastic polyethersulfone containing more than one SO 2 group in the repeating unit was carried out in both dynamic and isothermal heating conditions, under N 2 flow and in a static air atmosphere. The experiments indicated that the polymer degraded by initial random chain scissi…
It is demonstrated that the magnetostatic demagnetizing factor is not the only sample-shape dependent contribution to the hysteresis loop. There are also exchange contributions, which lead to interesting effects, particularly in nanostructures. An example is the recently discovered bulging mode in two-phase nanomagnet…
In order to determine the Debye parameter for the surface layer of Si crystal, we have measured the rocking curves of reflection high-energy electron diffraction (RHEED) from a Si(111)-7×7 surface at temperatures extending over a wide range, 293–1073 K. From the analysis of the dynamical calculation of RHEED intensity…
Article Carbon Black-Filled Conductive Polymers of Polypropylene, Ethylene Vinyl Acetate Copolymer, and Their Ternary Blends was published on May 1, 2000 in the journal Journal of Polymer Engineering (volume 20, issue 3).
Abstract Photoalignment technique has been applied for fabricating a zig‐zag defect‐free FLCD by using polyimide RN‐1199, −1286, −1266 (Nissan Chem. Ind.) and adopting oblique irradiation of unpolarized UV light. It is shown that among them RN‐1199 is the best for fabricating defect‐free cell, but RN‐1286 needs a low…
Slow straining of smooth tensile specimens of heat treated duplex stainless steel from a fabricated pipe has been used to assess susceptibility to embrittlement by hydrogen. The effect of the proportions of ferrite and austenite in the microstructure, produced by quenching after solution treatment at temperatures betw…
The concentration of charge carriers and their Hall mobility in Si:Er/Si layers grown by sublimational molecular-beam epitaxy were investigated as functions of temperature in the range of 300–77 K. No electric activity of Er-containing luminescent centers was observed. The feasibility of precise control over impurity…
A series of new poly(imide-hydrazide)s and poly(amide-imide-hydrazide)s were obtained by the direct polycondensation of N-[p-(or m-)carboxyphenyl]trimellitimide (p- or m-CPTMI) with terephthalic dihydrazide (TPH), isophthalic dihydrazide (IPH), and p-aminobenzhydrazide (p-ABH) by means of diphenyl phosphite and pyridi…
La–Zn substituted Sr-ferrite thin films were prepared by rf diode sputtering. The magnetic and crystallographic properties of the films were investigated by vibrating sample magnetometry and x-ray diffractometry. It is found that the texture of the films sensitively depends on the amount of substitution. Both the satu…
A study of the effects of microstructural changes on domain structure and magnetic properties as a result of fatigue has been made on Fe–C alloys subjected to either cold work, stress-relief annealing, or heat treatment that produced a ferritic/pearlitic structure. The magnetic properties varied with stress cycling de…
5,12-Dioxocyclams and bis-dioxocyclams were capped across the 1,8-secondary amino groups with 2,6-bis(bromomethyl)pyridine to give pyridine-capped mono- and bis-dioxocyclams. The copper(II) complex of capped monocyclam 5b was prepared and characterized by X-ray crystallography. Treatment of dioxocyclams with 2,3,5,6-t…
Abstract Porphyrin‐porphyrin and porphyrin‐chlorin dimers have been synthesized and evaluated for their photo‐physical and in vivo photodynamic therapy properties. Two of them can become potential new photosensitizers. Study of the reactivity of meso ‐tetraaryl porphyrins, as dienophiles, in Diels‐Alder transformation…
SmCo films with a Cr underlayer have been investigated as potentially attractive candidates for high density recording media. Magnetron sputtering was used here to produce Cr/SmCox/Cr films on Si (100) substrates. The magnetic films were deposited at a substrate temperature of 350 °C and an Ar pressure of 5 mTorr. Cr…
Novel long-chain acrylate based copolymers containing triphenylene groups have been synthesized which will open up new opportunities to synthesize discotic networks with columnar structure. This structure exists in the copolymer even when a non-discotic comonomer is introduced up to 75 mol-%. The cross-linking of the…