Materials Literature
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Synthesis and characterization of thermally stable polycyanurate is being reported here. The polycyanurate is a copolymer obtained by interfacial polycondensation of bisphenol-A, bisphenol-F and 2-methoxy-4, 6-dichloro-s-triazine. The copolymer obtained is characterized by various means. Spectroscopic characterization…
$^{15}\mathrm{N}$ nuclear-magnetic-resonance (NMR) measurements are reported on solid $^{15}\mathrm{NNO}$. Because of the anisotropic chemical shift and intramolecular dipole coupling, molecular reorientation results in a change in the nuclear-precession frequency. The rate of combined-translation-rotation jumps in th…
When undoped Yttrium Stabilized Zirconia is exposed either to reducing atmospheres or to electrical currents it becomes coloured. In this paper we present the results of a systematic study applying optical and EPR techniques to zirconia single crystals stabilized by calcium or yttrium, in which defects were produced b…
Two peaks at 355 and 525K appear in the thermoluminescence spectrum of polycrystalline spinel X-irradiated at room temperature. They are due to thermally released electrons which recombine at several impurity centres as well as at V-centres. The influence of defects arising from the structural disorder and the non-sto…
We present results from both, calorimetric and dilatometric studies of the isothermal ordering process taking place in a Cu-Zn-A1 shape memory alloy after quenches from T, temperatures ranging from 350 K to 1200 K. The dissipated energy and the length variations of the system are obtained during the process. The chang…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of poly(ethylene oxide) crystallization from solution: concentration dependenceNi Ding and Eric J. AmisCite this: Macromolecules 1991, 24, 24, 6464–6469Publication Date (Print):November 1, 1991Publication History Published online1 May 2002Published inissue 1 Novembe…
Lithium phosphate glasses with different iron oxide contents were prepared using a rapid quenching technique and their glass transition temperatures (Tg), densities (d) and refractive indexes (n) were measured.X-ray photoelectron spectroscopy(XPS), infrared spectroscopy(IR) and Mossbauer spectroscopy have been used to…
ABSTRACT Our previous report on separating low fat flesh from fatty fish by cryo‐shattering indicated that at appropriate temperatures, fat content in particles increased with particle size. The effect was temperature dependent; that effect of low temperature on fracture stress and elastic modulus of model fish flesh…
An experimental study has been conducted to estimate volumetric heat transfer coefficients between product volatiles and the .solid matrix within the tortuous pore network of decomposing glass-filled polymer composites. Two such composite materials, denoted as Haveg H41N and Fiberite MXBE-350, have been studied in thi…
Abstract This paper reports an investigation of the influence of fabric softener on fiber transfer, using a relatively new fiber transfer abrasion tester. Nine medium-weight apparel fabrics were evaluated with and without fabric softener. Fiber transfer from these fabrics was evaluated in terms of the total number of…
A new method for the examination of molds that involves the use of a device that dispenses a thin layer of a transparent adhesive material over the surface of a coverslip is described. The advantages of this method over previous methods used for the microscopic examination of molds are delineated.
In this paper, the acid-base interaction is shown to consist of at least two major components: the electrostatic (or ionic) and charge transfer (or covalent). To complement existing acid-base theories, we further demonstrate the relevance of the density-functional theory to surface interactions and solid adhesion. On…
Direct writing of metal features narrower than 100 nm is accomplished by scanning a focused ion beam over a substrate covered with a thin solid metalorganic film. A metalorganic cluster coordination compound [Ir4(CO)11Br][N(C2H5)4] is spun on an oxidized silicon wafer from acetone solution and the resulting layer is i…
The authors present test results on preparing a set of Co-substituted Ni ferrites Ni/sub 1-x/Co/sub x/Fe/sub 2/O/sub 4/ (x=0.04 to 0.25) as a material which absorbs electromagnetic wave energy at the X band. A novel method of determining the dependence of the microwave complex permeability on the frequency is describe…
Populations of the widespread diatom Aidacosira islandica (O. Müll.) Sim. from a number of USSR water-bodies have been studied with the help of SEM. Morphological variability of the frustules has been considered with special attention to the structure of mantle areolae and such diagnostic characters as the number of a…
The effect of hexachlorophene (HCP; 2,2'-methylenebis(3,4,6-trichlorophenol), cuprizone (CPZ; bicyclohexone oxaldihydrazone) and triethyl tin (TET; triethyl tin sulphate) in producing vacuoles in the brain of the Sprague-Dawley rat has been quantified by image analysis of the extent of the spongy change in the white m…
The application of magnetostriction in the design of a hybrid, electromechanical/hydraulic high-performance linear (large force and stroke) and/or rotational (large moment and angle) actuator is considered. The design concept combines the high power density of actuation possible with magnetostriction (approaching 0.1…
Diatoms occur at Site 768 in the equatorial Indian Ocean in three intervals: (1) Quaternary to upper Pliocene, (2) lower Miocene to upper Oligocene, and (3) upper Campanian. The diatom assemblages are documented for each of these intervals. Similarities between the diatom flora in the equatorial Pacific and at Site 75…
The magnetic annealing behavior of electroplated, 2.00- mu m-thick, NiFe films containing nominally 82% Ni, in the temperature range from 100 to 500 degrees C, was investigated through characterization of the structural properties of full films and the domain configurations of films shaped like an inductive-head yoke.…
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