Materials Literature
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Abstract This paper is intended to review some aspects of fibrillar networks by comparing polymer thermoreversible gels and organogels, the latter being obtained through the self‐assembling of small organic molecules. The morphology, the rheological properties and the gelation mechanisms are particularly examined. The…
Spectrophotometry measurements at wavelengths from 180 nm to 3000 nm, x-ray diffraction, and Raman spectroscopy were used in the characterization of polycrystalline Pb(Zr x Ti 1− x )O 3 films with various thicknesses deposited by pulsed laser deposition on MgO substrates. It was found that films were under a strong co…
The direct current (dc) conductivity (σdc) of pristine and ferric chloride doped poly(3-octylthiophene) has been measured in the temperature range of 6–300K. Mott’s three-dimensional variable range hopping and thermally activated tunneling are suggested as the dominant mechanisms of dc conduction at high (77–300K) and…
Abstract Polyamide 6/12 copolymers were prepared by employing two different initiation systems containing activator N‐benzoyl‐ε‐caprolactam (BzCL) and initiator either sodium salt of ε‐caprolactam (CLNa) or ε‐caprolactam magnesium bromide (CLMgBr). Materials prepared by initiation with CLNa show one melting endotherm…
Metal phthalocyanines (MPc) (M = Cu, Ni, Co and Fe) have been synthesized and characterized by XRD, IR, ESR and thermal technique. The solid state studies such as magnetic susceptibility, electrical resistivity and electron spin resonance have been carried out. Solar induced degradation of a textile dye Naphthol Blue…
The inverse flexoelectric phenomenon describes the generation of a mechanical deformation in an insulating solid by an applied gradient of the electric field. Lead magnesium niobate-lead titanate (PMNT) ceramic permits study of the inverse flexoelectric behavior because of its large flexoelectric coefficient. Special…
Depolymerization of chitin and chitosan in the course of deacetylation in an alkaline medium was studied, and the influence exerted on the process by the nature and concentration of the alkali (NaOH, KOH) and salts (NaCl, NaI, KI) was examined.
The influence of the Co addition and synthesis route on desorption properties of MgH2 were investigated. Ball milling of MgH2-Co blends was performed under Ar using different milling intensities and different weight ratios. Microstructural and morphological characterization, performed by XRD and SEM, show a huge corre…
The crystalline and magnetic structures and magnetic properties of La1−x BixMnO3+δ (0.4 ≤ x ≤ 0.6, 0 ≤ δ ≤ 0.06) manganites have been studied. The solid solutions having the stoichiometric oxygen content are shown to be orbitally ordered A-type antiferromagnets. An increase in the oxygen content above the stoichiometr…
The processes of cis-trans photoisomerization and thermal back isomerization as well as the effect of DNA on the spectral and kinetic characteristics of the triplet state of a number of meso-substituted thiacarbocyanine dyes: 3,3’-diethyl-9-methoxythiacarbocyanine iodide (K1), 3,3’,9-triethylthiacarbocyanine iodide (K…
The containment failure probability due to ex-vessel steam explosions was evaluated for Japanese BWR and PWR model plants. A stratified Monte Carlo technique (Latin Hypercube Sampling (LHS)) was applied for the evaluation of steam explosion loads, in which a steam explosion simulation code JASMINE was used as a physic…
Balanced and unbalanced composite right/left-handed transmission lines are used in the design of resonators. The balanced resonator is designed by changing the nonlinear phase response in order to control the spacing between modes and the Q factor. Two balanced ring resonators are measured and one demonstrates increas…
To study the minimal length required for the secretion of recombinant proteins and silk proteins in posterior silk gland, the signal peptide (SP) of the fibroin heavy chain (FibH) of silkworm Bombyx mori was systematically shortened from the C-terminal. Its effect on the secretion of protein was observed using enhance…
Local scale effects for linear continuous media are investigated as applied to the composites reinforced by nanoparticles. A mathematical model of the interphase layer is proposed that describes the specific nature of deformations in the neighborhood of the interface between different phases in an inhomogeneous materi…
Abstract A new semiaromatic polyamide, PA9-T, was melt-spun at take-up speeds from 200 to 1000m min −1 . The as-spun fibers were drawn with CO 2 laser-heated drawing to their maximal draw ratio (DR max ). The drawing stress was recorded during this process. The effects of take-up speed of melt-spinning on maximally dr…
Abstract Microcellular wood fibre reinforced polymers have practical significance given the possibility of reducing the density of automotive components due to their microcellular structure, as well as processing and performance advantages. A microcellular foaming process with a chemical foaming agent was applied at a…
A worldwide effort is underway to remove lead from many commercial products. Most ferroelectric ceramics contain lead, principally those based on lead-zirconate-titanate solid solutions. Recently a new non-lead containing composition series has been developed by Saito et al. These are alkaline niobate based materials…
This study evaluated the compliance and stiffness of decellularized canine common carotid artery as well as decellularized canine ureter and compared it with that of polytetrafluoroethylene, elastin gel combined with polylactic acid tube, and canine common carotid artery. To calculate the compliance and stiffness, int…
The textural dependence of the thermally sprayed Er-doped ZnO films on Er concentration is reported here. The [002] preferred growth orientation of hexagonal phase is obtained at the lower concentrations, while the [100] and [101] directions additionally raised from nearly 5at.% Er content onwards. The cathodoluminesc…
Abstract Synchrotron X-ray diffraction technique has revealed strain-induced crystallization and molecular orientation in vulcanized rubbers and thermoplastic elastomers (TPE) during deformation in real time. The stress-strain curves and wide angle X-ray diffraction (WAXD) patterns in vulcanized rubbers and TPE were m…