Materials Literature
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The in-plane permeability or transmissivity of a geotextile becomes an important property when it is used in applications involving cohesive soils (clays). Because cohesive soils are relatively impermeable, the geotextile is mainly responsible for drain ing the water from the soil structure, thus releasing the pore wa…
Sodium silicate and sodium borate were tested as flame retardants on two types of paper sheet (100% rice straw pulp paper with a high silica content while the other consisted of 100% wood pulp paper). After addition of inorganic flame retardant salts (sodium silicate and sodium borate) on to the two samples of paper,…
We study the elasticity behaviour at the sol-gel transition with a percolation dynamic model via computer simulations on a square lattice. From the fluctuations in the center-of-mass motion of the percolating cluster we determine the critical behaviour of the macroscopic elastic constant of the gel phase, growing abov…
This paper is the result of an interdisciplinary research project at the Institute of Textile and Clothing Technology and the Institute of Solid Mechanics. The aim of this project is to describe and simulate the deformation behavior of flexural fabrics ( espe cially woven fabrics). For the simulation model, the shell…
The zeroth-order cross-reflection coefficients of a surface-relief grating are shown to be equal from experimental evidence and numerical evidence by use of rigorous coupled-wave analysis simulations. This result is valid for any range of grating parameters as well as for anisotropic media that have the optic axis in…
The kinetics of polarization switching in ferroelectric crystals is studied using the concept of fractals. The switching process is found to be multifractal.
Abstract Ionomeric polyblends of the zinc salt of maleated EPDM rubber (Zn‐mEPDM) and the zinc salt of maleated polypropylene (Zn‐mPP) in the composition range from 90/10 to 60/40 wt% behave as ionic thermoplastic elastomers (ITPE), which show synergism in physical properties. The ionomeric polyblend shows higher phys…
A time-domain analysis of quasi-static magnetic fields around nonperfectly conductive shields is performed by a numerical procedure based on the nodal-based finite element method (FEM). Eliminating the shield region from the computational domain, a new boundary is generated where impedance network boundary conditions…
The peroxo‐oxalate complexation method is a method that can be used for the preparation of doped barium titanate. In this paper we focus on BaTi 0.91 Zr 0.09 O 3 , which can be used for discharge capacitors in lamp starters. The preparation method described here is based on the complexation and subsequent precipitatio…
Abstract An unprecedented layered (2-D) honeycomb supramolecular structure comprised of μ4-σ-dimerized 7,7,8,8-tetracyano-p-quinodimethane dianion bridging four S = 2 substituted Mn(III)porphyrins as demonstrated with meso-tetrakis(2,4,6-trimethylphenyl)porphyrinato has been structural characterized.
Optically isotropic cubic mesophases, which are commonly exhibited by lyotropic materials, have been observed in a few thermotropic liquid crystalline systems also. Although the first thermotropic cubic mesophase was reported about 40 years ago, its existence in diverse systems is only a recent finding. Moreover, the…
The resonance Raman spectra of a mixed-valence copper dimer [Cu2(L)]3+ encapsulated by the ligand L = N(CH2CH2N(H)CH2CH2N(H)CH2CH2)3N are reported. Copper isotope data (63/65Cu) of solution spectra of [Cu2(L)]3+ allow identification of vibrational bands at 289 and 172 cm-1 as predominately Cu−Cu stretching and Cu−Cu−N…
With the predominance of XAFS analysis for structural information now using theoretical standards such as FEF~ The motivation for this work is threefold. First, the library is intended to reduce the need to collect XAFS data on model compounds, which is still useful in assessing the reliability of theoretical XAFS sta…
We demonstrate an innovative method for fabrication of high-spatial-frequency grating structures. This technique makes use of the near-field diffraction patterns from computer-generated phase holograms for lithographic fabrication of grating structures with periods that are one half that of the phase hologram mask. Li…
This article discusses the influence of two natural terpene resins (NTR), poly(α-pinene) (PαP A115) and poly(d-limonene) (PL C115), on morphology, miscibility, thermal, and dynamic-mechanical properties of their blends with isotactic polypropylene (iPP). The NTR have interesting physical and chemical properties, and t…
Abstract The trigonal structure of a new member of the eudialyte group was established from X-ray single-crystal diffraction, λ (Mo K α ) = 0.71073 Å; space group R 3 m ; a = 14.153(9) Å, c = 60.72(5) Å, V = 10546.1 Å 3 ; M = 3050; D x = 2.88 g/cm 3 ; Z = 3; μ = 28cm −1 ; R ( hkl ) = 0.068 for 3402 reflections. Due to…
Equilibrium constants determined from low molecular weight mixtures are used to predict the phase behavior of analogous polymer blends. Due consideration is given to intramolecular screening and functional group accessibility, factors that are a direct consequence of chain connectivity.
Two kinds of magnetization in isotropic permanent magnets are introduced and analyzed by FEM: one is a radial magnetization type, the other is a parabolic one. From the results of FEA, it is found that the permanent magnet with parabolic magnetization has low leakage flux and high interior surface flux density despite…
The microstructure and chemistry of a functionally gradient Ti-doped diamond-like carbon (DLC) coating prepared by a closed field unbalanced magnetron sputtering system (CFUBMS) on a type 304 stainless steel was analyzed by transmission electron microscopy (TEM), electron energy loss spectroscopy (EELS), and scanning…
Using the extended Jones calculus for oblique incidence, we have succeeded in representing light propagation through birefringent media on the Poincaré sphere for arbitrary propagation directions. The situation is far more complicated than for the case of perpendicular transmission. To achieve a simple representation…