Materials Literature
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Abstract Poly(1‐octene) was synthesized by polymerization of 1‐octene using high performance MgCl 2 ‐supported TiCl 4 in combination with triethyl aluminum (TEAl) as cocatalyst in n ‐hexane for 2 h. Two catalysts, C 1 (diester catalyst) having di‐isobutyl phthalate as internal donor and C 2 (monoester catalyst) having…
We measured the infrared-active vibrational modes of the Kagom\'e staircase compound ${\text{Ni}}_{3}{\text{V}}_{2}{\text{O}}_{8}$ as a function of temperature to elucidate magnetoelastic interactions and local structure changes through the series of magnetic-ordering transitions. A detailed analysis of frequency-shif…
New pyrrolo[3,4-c]pyrrole-1,4-dione (DPP) derivatives carrying 3,4-ethylenedioxy-thiophenylphenyl (EDOT-phenyl) substituent groups in the 3- and 6-position, or in the 2- and 5-position of the DPP chromophore were synthesised and electrochemically polymerised. The properties of the polymers were investigated using cycl…
Large deformation kinematics and internal forces arising from defects in crystalline solids are addressed by a nonlinear kinematic description and multiscale averaging concepts. An element of crystalline material with spatially uniform properties and containing defects such as dislocation lines and loops is considered…
The aggregation behavior of peptides Ac-VQIVYK-amide (AcPHF6) and Ac-QIVYK-amide (AcPHF5) from the amyloidogenic protein tau was examined by atomic force microscopy (AFM) and fluorescence microscopy. Although AcPHF5 did not show enhancement of thioflavin T (ThT) fluorescence in aqueous buffer, distinct aggregates were…
Novel ternary type-I clathrate compounds Ba(8){Zn,Cd}(x)Si(46-x), x∼7 have been synthesized from the elements by melting and reacting in quartz ampoules. Structural investigations for both compounds, i.e. x-ray single-crystal data at 300, 200 and 100 K for Ba(8)Zn(7)Si(39) and Rietveld data for Ba(8)Cd(7)Si(39), confi…
Abstract An efficient extrusion process involving the injection of water while processing was used to prepare poly (styrene‐ co ‐acrylonitrile) (SAN)/clay nanocomposites with a high degree of nanoclay delamination. The usefulness of water‐assisted extrusion is highlighted here, in comparison with classical extrusion a…
This paper reports on the laser induced changes on the optical properties of a-Ga 50 Se 50 thin films prepared by the thermal evaporation technique under vacuum. Thin film samples, on a glass substrate, were exposed to laser light of wavelength λ = 532 nm for different exposure times, t E ( t E = 0, 500, 1500 and 3000…
Abstract This article presents the analysis of the processing parameters influence on the foaming behavior and cellular structure of PP‐montmorillonite foams. Polypropylene nanocomposites containing 5.0 phr of an organically‐modified montmorillonite (MMT) were initially melt‐compounded in a twin‐screw extruder with az…
Abstract A series of acrylonitrile–butadiene–styrene (ABS) copolymers were prepared using lithium‐catalyzed low‐ cis rubber (PB700A), nickel‐catalyzed high‐ cis rubber (BR9004), and their compounded rubber (PB700A/BR9004 = 50:50) as toughening agents through bulk polymerization. The effects of molecular structures of…
Abstract The polymethylphenylsilsesquioxane (PMPSQ) microspheres were used as an additive for the injection‐molding of polycarbonate (PC) in order to obtain a flame retardant polymer and to damage the other properties of PC as low as possible. The results showed that PMPSQ microspheres were a kind of effective flame r…
Lactobacillus casei L-lactate dehydrogenase (LCLDH) is activated through the homotropic and heterotropic activation effects of pyruvate and fructose 1,6-bisphosphate (FBP), respectively, and exhibits unusually high pH-dependence in the allosteric effects of these ligands. The active (R) and inactive (T) state structur…
Abstract Di(isononyl) cyclohexane‐1,2‐dicarboxylate (DINCH) was used as a new plasticizer for poly(lactic acid) (PLA), and the effects of DINCH and tributyl citrate ester (TBC) on the morphology, mechanical and thermal properties, and durability of PLA were compared. DINCH has limited compatibility with PLA, leading t…
When solving the crystal structure of complex molecules from powder data, accurately locating the global minimum can be challenging, particularly where the number of internal degrees of freedom is large. The program Mogul provides a convenient means to access typical torsion angle ranges for fragments related to the m…
In this work we investigated the chemical composition and structure of (K0.5Na0.5)NbO3 (KNN) single crystals grown by the solid state crystal growth method. The optical, scanning, and transmission electron microscopies were employed for the analysis of the chemical homogeneity and domain structure of the KNN crystal.…
Poly(vinyl acetate) (PVAc) is an inexpensive, high-tonnage bulk commodity polymer which, unlike most vinyl polymers, is moderately biodegradable. PVAc has been shown to exhibit anomalously high solubility in CO 2 with respect to other vinyl hydrocarbon polymers. Understanding the phase behavior of PVAc in CO 2 and its…
Nanoparticles of europium doped yttrium oxide (Y 2 O 3:Eu 3+ ) were synthesized by the coprecipitation method using oleic acid as a surfactant in the presence of other additives. Incorporation of additives like ethylenediaminetetraacetic acid (EDTA) and NaCl in the reaction mixture drastically affects the particle siz…
These studies show for the first time that the synthesis of two distinct phase-separated copolymers within one colloidal particle, i.e., poly(methyl methacrylate) (PMMA)/n-butylacrylate (nBA) and poly(nBA)/pentafluorostyrene (p-PFS) phases, results in unique acorn-shaped morphologies and are capable of coalescence. Sp…
Molecular dynamics simulations of ZnO nanowires under tensile loading were performed and compared with simulations of TiO(2) wires to present size-dependent mechanical properties and super ductility of metal oxide wires. It is shown that while large surface-to-volume ratio is responsible for their size effects, ZnO an…
The objective of this review article is to provide a concise discussion of atomistic modeling efforts aimed at understanding the nanoscale behavior and the role of grain boundaries in plasticity of metallic polycrystalline materials. Atomistic simulations of grain boundary behavior during plastic deformation have focu…