Materials Literature
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Techniques are summarized for evaluating thermodynamic functions for pure elements in crystal and liquid phases. An accurate evaluation of the ion-motional free energy is given by quasiharmonic lattice dynamics at quantum temperatures, and computer simulations (e.g., molecular dynamics) at classical temperatures for b…
A theoretical analysis is presented in this paper to predict the dynamic plastic response of aluminium alloy and mild steel circular plates when struck normally by blunt solid cylindrical masses at the center. Reasonable agreement is obtained with experimental results for the permanent transverse displacements. Differ…
The effect of coexchanging of Cu-M-ZSM-5 zeolites (M = Ce, Sn, Sm) upon the interaction with nitric oxide was investigated by FT-IR. Spectra recorded on Cu-ZSM-5, in the presence of NO and at room temperature, exhibit typical features, very well reported in the literature. During NO decomposition at 673 K in the prese…
Photoinduced electron transfer reactions are characterized in supramolecular assemblies consisting of a series of Ru(II)−bipyridine complexes that include tethered dialkoxybenzene units 2 − 5 and cyclo[bis( N, N ‘- p -xylylene-4,4‘-bipyridinium)], BXV 4+ ( 1 ). Formation of supramolecular complexes between BXV 4+ and…
Alignate gels are known to be biocompatible, degradable, and nontoxic. In this study, sodium alginate was impregnated into a porous, knitted polyester graft (Microvel double velour graft) 6 mm in diameter. The alginate-impregnated graft was investigated in vitro and in vivo to evaluate its potential for use as a new v…
Ceramic materials are usually assumed linear elastic up to failure and the failure criterion is accustomed to be a limit condition related to the tensile strength. Due to the difficulties associated with the uniaxial tensile test, some different alternatives have been posed such as Brazilian tests and spalling test of…
A new procedure for the synthesis of mesoporous alumina membranes is presented. Using this technique, catalytic membranes with precise active layer width and location were prepared by sequential slip-casting of Pt/alumina and alumina sols. Different distributions of catalyst within the membrane can be easily obtained…
3-(o-Carboranylhydroxymethyl)-7-isopropylazulene sodium carboxylate (1) and 3-(o-carboranylmethyl)-7-isopropylazulene sodium sulfonate (2) were synthesized from the palladium-catalyzed addition reaction of 1-carboranyltributylstannane (4) to azulene aldehydes (3 and 9). Although the water solubility of 1 was of the or…
A new electron-deficient tentacle porphyrin meso-tetrakis[2,3,5,6-tetrafluoro-4-(2-trimethylammoniumethylamine )phenyl]porphyrin (TthetaF4TAP) has been synthesized. The binding interactions of TthetaF4TAP with DNA polymers were studied for comparison to those of an electron-deficient tentacle porphyrin and an electron…
Epitaxially grown Pb(Zr, Ti)O 3 (PZT, Pb:Zr:Ti=1:0.52:0.48) thin films were prepared on Nb-doped SrTiO 3 (100) substrates by dipping-pyrolysis process with metal naphthenates used as starting materials. The alignments of the films were investigated based on X-ray diffraction (XRD) θ–2θ scans, β scans (pole figures), a…
The infinite hierarchy of differential-recurrence relations for the equilibrium transverse correlation functions appropriate to magnetic relaxation of single-domain ferromagnetic particles with uniaxial anisotropy subjected to a uniform external magnetic field ${H}_{0}$ is derived by averaging Gilbert's equation. Exac…
Domains in certain Langmuir monolayers support a texture that is the two-dimensional version of the feature known as a boojum. Such a texture has a quantifiable effect on the shape of the domain with which it is associated. The most noticeable consequence is a cusplike feature on the domain boundary. We report the res…
This article examines the effects of the soft-segment composition on the structure and physical properties of waterborne polyurethane (WBPU) based on polycaprolactone–poly(ethylene glycol)–polycaprolactone (PCL–PEG–PCL) triblock copolydiol as the soft segment. The molecular weight of PEG in the soft-segment compositio…
A numerical technique has been developed to model texture in nematic liquid crystals. The technique differentiates between splay, twist and bend distortions and includes splay-splay compensation. The technique is tested by the simulation of the Freedericksz transition and by the determination of minimum energy directo…
The microstructures of α‐Al 2 O 3 seeded sol–gel‐derived alumina‐zirconia composites containing 20 wt% unstabilized zirconia (processed from zirconium n‐propoxide) were very fine, with submicrometer alumina grains and small, mainly intergranular zirconia particles, the latter having a critical size for the tetragonal‐…
Abstract Polymer networks showing different smectic polymorphism with either an interdigitated smectic A to undulated smectic A phase transformation or an interdigitated smectic A to double layer smectic C phase transformation are synthesized. Their orientation behavior in uniaxial mechanical fields is investigated by…
Three different sites of the ${\mathrm{Cr}}^{3+}$ ions in the fluoride perovskite ${\mathrm{KMgF}}_{3}$ have been identified by absorption, selective optical excitation, and time-resolved emission spectroscopy of the ${}^{4}{T}_{2}{\ensuremath{\leftrightarrow}}^{4}{A}_{2}$ transition. High-pressure measurements showin…
The synthesis of carboxyl-terminated poly(ethylene glycol adipate) (CTPA) and amine-terminated poly(amide sulfone) (ATPS) based on the CTPA and 4,4′-diaminodiphenyl sulfone (DDS) is described. The products were characterized by IR and 13C-NMR spectroscopic analysis, nonaqueous titration, viscosity measurement, and sol…
Time-resolved light scattering has been used to investigate phase-separation dynamics for off-critical mixtures of polybutadiene (PB) and polyisoprene (PI) with a well defined phase diagram. Percolation-to-cluster transition (PCT) occurs in the course of the phase separation process for an off-critical mixture of the…
Copolymers containing vinyl sugar units were synthesized by copolymerizing 2,3;4,5-di- O -isopropylidene-1-(4-vinylphenyl)- d -gluco( d -manno)pentitol ( 1 ) with styrene. Films and plates of the copolymers and blends were prepared by casting solutions on glass plates or by hot-pressing. Isopropylidene groups, the hyd…