Materials Literature
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The internal reinforcement of Douglas-fir by glass or basalt fibers impregnated with resorcinol-phenol-formaldehyde or polymeric diphenylmethanediisocyanate bonding resins has been investigated. The objective was to evaluate the improvement in composite properties by the use of silane coupling agents. Fibers were trea…
Vielzeuf and Holloway (1988) experimentally studied the melting of a metapelite under fluidabsent conditions. At 10 kbar, three main stages of melting were distinguished : I) The first melting occurs below 800~ and corresponds to the breakdown of muscovite via reactions such as Ms + Bt + PI + Qtz + V = M + Als;Ms + PI…
The one-electron donor (reducing) sites and their strength distribution on hydrotalcite, MgO and Al2O3 surfaces have been measured with a series of electron acceptor molecules (nitrobenzene, m-dinitrobenzene, sym-trinitrobenzene, 2,4-dinitrotoluene, tetracyanoethene), whose electron affinity (Eea) values are different…
These experimental studies are mainly concerned with the matter ejection from the free surface and the bulk microspalling of the sample near the free surface. We describe an experimental technique using flash X‐ray radiography in order to study the shock‐induced ejection and microspalling. Experiments have been achiev…
Ionomers are predominantly nonpolar polymers that contain a small amount of bonded salt groups. Microphase separation of ion-rich microdomains occurs as a consequence of the thermodynamic incompatibility of the salt groups and the polymer matrix and associative interactions between salt groups. Associations of the sal…
As indicated by thin layer cyclic voltammetry, electrocrystallization of bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) at the second oxidation potential affords a charge-transfer salt of 1 : 1 stoichiometry, i.e.(BEDT-TTF)PF6·0.5CH2Cl2, the crystal structure of which is presented.
This paper describes the effect of fibre linear density and the use of carded cotton on the mechanical properties and handle of blended-fibre fabrics produced from open-end-spun and ring-spun yarns. It is found that, whereas fibre linear density has very little effect, the use of carded cotton with polyester fibre enh…
Considerable progress has been made in assigning the UV/VIS/near-IR electronic spectra (5000–50 000 cm–1) of [Ru2Cl9]3– and [Ru2Br9]3–, with the aid of SCF-Xα-SW calculations. A conceptual framework within which band energies and relative intensities can be discussed was constructed by reference to the corresponding […
Solid state reaction diffusion between Ag and Zr in the temperature range from 980 to 1190 K has been studied. Two intermetallic compounds, AgZr and AgZr2, predicted from the Ag–Zr phase diagram have been observed in the diffusion zone. About 95% of the total thickness of the compound layers is occupied by the AgZr ph…
For this study, the authors have prepared a lubricating grease based on a titanium metal complex soap thickener, which has so far exhibited performance characteristics comparative to other conventional high performance lubricating grease
Two occlusive, adhesive dressings--one hydrocolloid (absorptive) and one zinc-medicated (non-absorptive)--were studied regarding their occlusivity and effects when applied to normal human skin for 48 h. Both dressings reduced normal transepidermal water loss by about 70%. As documented by a 7-fold increase in the wate…
A discussion of the mechanism of nylon 6, 6 dissolving process using CaCl2/MeOH as the sol-vent is presented. The calcium chloride forms a complex compound with nylon 6, 6 by breakingthe hydrogen bonds. The melting point of the CaCl2 --nylon 6, 6 complex was found to be reducedby 91K relative to the pure nylon 6, 6 po…
透過型電子顕微鏡(TEM)および走査透過型電子顕微鏡(STEM)を用いたフタロシアニン高分子LB膜, 長鎖脂肪酸およびフラーレン(C60)の蒸着膜の高分解能・高コントラスト結像の結果を紹介する.
AC small‐signal immittance spectroscopy is employed as a viable tool to demonstrate electrical characterization, performance improvement, and quality assurance issues of smart materials‐based components and novel devices. The variation in the ac response, complemented via dc measurements within a range of tolerating t…
Abstract The thermal conductivity of ice, formed at different cooling rates during the solidification process, is measured between 2 and 80 K. It is found that the thermal conductivity depends upon the cooling rate. The density of vibrational states is determined from the heat capacity data available in literature and…
The intercalation of copper(I) and (II) ions into the interlamellar regions of the layered compounds ALaNb2O7(A = H, K, Cs) has been carried out. Copper(I) ions could be inserted into the interlayer by ion exchange in aqueous CuCl despite the very low solubility of CuCl in water. Copper(II) ions could be inserted by h…
Structural analyses of the products formed in the base-catalysed alkylation of 2-naphthol with glyoxal were performed by IR, 1H and 13C NMR spectroscopy and mass spectrometry. The final product, 7a,14c-dihydrobenzo[e]benzo[4,5]benzofuro[2,3-b]benzofuran (4), was determined to be in the cis rather than the trans form.…
The effects of the imidization temperature of poly(imide-siloxane) on the adhesion strength of epoxy resin/poly(imide-siloxane) joints were studied. The effects of the content and molecular weight of polydimethylsiloxane in poly(imide-siloxane) on the adhesion strength were also examined with samples of pyromellitic d…
We investigated the structural and physical properties of spinel compounds ${\mathrm{Mg}}_{2\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Ti}}_{1+\mathit{x}}$${\mathrm{O}}_{4}$ in the Mg[${\mathrm{Ti}}_{2}$]${\mathrm{O}}_{4\mathrm{\ensuremath{-}}}$Mg[MgTi]${\mathrm{O}}_{4}$ system. Polycrystalline samples of ${\mathrm{…
Abstract Optical examination of as‐grown {100} surfaces of sodium chlorate crystals grown from aqueous solution revealed the presence of elliptical growth hillocks. The hillocks were present on both enantiomorphous forms and originated from dislocations, inclusions, and microcrystals attached to the growing surface. T…