Materials Literature
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Recent years have shown steady progress in research towards molecular electronics [1,2], where molecules have been investigated as switches [3-5], diodes [6], and electronic mixers [7]. In much of the previous work a Scanning Tunnelling Microscope was employed to address an individual molecule. As this arrangement doe…
We consider spatially discrete bistable reaction-diffusion equations that admit wave front solutions. Depending on the parameters involved, such wave fronts appear to be pinned or to glide at a certain speed. We study the transition of traveling waves to steady solutions near threshold and give conditions for front pi…
Abstract We evaluated the effects of the solvent composition with respect to the solution concentration, applied electric field, and tip‐to‐collector distance on the morphology of electrospun poly(vinyl chloride) (PVC) fibers. The solvent volume ratio was strongly correlated with the diameter of the electrospun fibers…
Abstract Poly(lactic acid) (PLA) was blended with five plasticizers in a batchwise mixer and pressed into films. The films were analyzed by means of dynamic mechanical analysis and differential scanning calorimetry to investigate the properties of the blends. Triacetine and tributyl citrate proved to be effective as p…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
Abstract Poly(ethylene terephthalate) copolymers (abbreviated PEBEPT) containing 2‐butyl‐2‐ethyl‐1,3‐propanediol (BEPD) for the whole range of compositions were prepared by bulk polycondensation of either terephthalic acid or dimethyl terephthalate as the diacid monomer with mixtures of ethylene glycol and BEPD. Polym…
This paper describes results obtained using an automated, crystallographically-based technique for twin identification. The technique is based on the automated collection of spatially specific orientation measurements by electron backscatter diffraction (EBSD) in the scanning electron microscope (SEM). The key feature…
昨今, コンクリート構造物からのコンクリート片の剥落が社会問題となっている.本文では, コンクリート片の剥落が生じた鉄道高架橋, 架道橋, およびこ線橋 (以下, 高架橋等とする) のかぶり, コンクリートの中性化深さ, 鉄筋腐食度などを調査し, 高架橋等からのコンクリート片の剥落要因を検討した. その結果, かぶり, 中性化残り, および雨水, 漏水の影響が, コンクリート片の剥落および鉄筋腐食と関係の深いことがわかった.
Deformation of a grain in polycrystalli ne metals is restricted or forced by deformation of neighbor grains during plastic deformation processes. It also gives influence to deformation of neighbor grains at the same time. Interaction between grains causes inhomogeneous local deformation and texture during plastic defo…
A novel lamellar silica mesostructure has been prepared using a silicone-based copolymer as the template under different conditions. The results demonstrated that the silicone copolymer with an unrestricted supramolecular configuration is responsible for the formation of the lamellar structure. Lamellar materials have…
Development of recrystallization texture in a IF steel containing 0.002wt% C, 0.0 6 wt% Ti is investigated by EBSD technique. Strong a-fiber texture, maximum at {112} is developed in cold rolled state, and strong ?-fiber texture which has maximum value at {111} is developed after annealing in salt bath. A technique to…
The new combined methodology for quantitative description of texture, structure and other microstructural parameters of thin layers using X-ray diffraction is presented and applied to the case of a ferroelectric thin film of Pb0.76Ca0.24TiO3 on a Pt/TiO2/SiO2/Si substrate. The approach allows the quantitative texture…
Novel amphiphilic poly(norbornene)s were prepared from two different monomers bearing a copper phthalocyanine and a branched hydrophilic side chain through a ring-opening metathesis reaction using a ruthenium initiator. The phthalocyanine moieties were contained as a side chain of the resulting poly(norbornene) backbo…
Abstract X‐ray reflectivity has been used to determine the mass uptake of probe molecules in porous thin films supported on thick silicon wafers. The adsorption occurs by capillary condensation when the films are exposed to probe vapor at controlled partial vapor pressures. The probe solvent partial pressure was varie…
Abstract The work presented here discusses a new technique for preparing silk fibers and films with persistent antimicrobial activity through use of metallic dyestuffs during the fiber dyeing process. The length of the silk fibers investigated contracted when the fibers were immersed in concentrated neutral salt solut…
In many applications where thin films are involved, like in electronics or ferroelectricity, it is required quantitatively to characterize their texture and residual stresses. Moreover, commonly the films contain several layers and phases, and due to the severe overlapping of the reflection peaks and sharp texture, th…
dimensional phase- field model is d eveloped to describe the cubic to tetragonal martensitic phase transformation in thin film attached to a substrate. Elastic solutions are derived for both elastically anisotropic and isotropic thin films with arbitrary domain structures, subject to the mixed stress -free and constra…
Abstract An inverted emulsion method for the synthesis of electrically conductive polyaniline–polystyrene blends of different compositions (10, 30, 50, 70, and 85%, wt/wt) is described. Polymerization of aniline is carried out in chloroform in the dispersed phase by using benzoyl peroxide as a novel oxidant and sulfos…
Abstract The effect of various benzenesulfonamide (BSA) plasticizers on the amorphous phase of semicrystalline polydodecamide (PA‐12) has been investigated. MonoBSAs appear as efficient glass‐transition temperature ( T g ) depressors because of their miscibility with the host polyamide (PA), low glass transition, and…
The mono-terminal hydroxyl groups of polybutadiene of varying chain length were studied as sites for initiation of lactone ring-opening polymerization by lipase catalysis. Novozyme-435 (immobilized Candida antarctica lipase B) was an effective catalyst for this acylation. Monohydroxyl-terminated polybutadiene with M n…