Materials Literature
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Abstract To identify the effect of reactive preparation on the structure and properties of rigid polyurethane (PU)‐layered silicate nanocomposite, a range of nanocomposites were prepared by combining the various precursors in different sequences. The morphology of the samples was characterized by XRD and TEM. Tensile…
Abstract The new magnesium based intermetallic compounds Nd 4 Co 2 Mg 3 and Sm 4 Co 2 Mg 3 were synthesized by induction melting of the elements in sealed tantalum tubes in a water‐cooled sample chamber. The compounds were studied by X‐ray powder and single crystal diffractometer data: P 2/ m , a = 765.42(14), b = 380…
Abstract Thermal properties of blends of poly(aryl ether ether ketone), PEEK, with a thermotropic liquid crystalline polymer, Vectra®, were investigated by differential scanning calorimetry and X‐ray diffraction techniques. Isothermal crystallization experiments were performed over a wide range of crystallization temp…
This paper proposes a shunt electromagnetic filter to attenuate zero-sequence harmonic injection into three-phase star-grounded supplies. The device is built on the basis of zigzag windings and a three-leg core-type magnetic arrangement. Physical considerations as well as mathematical modeling and computer implementat…
Poly(acrylate) was derivatized with Rh III (pc) (pc = phthalocyanine) and the morphology of the strands was established by AFM microscopy. The strands of the polymer, poly-Rh III (pc), were seen as the strings of spherules expected for an hypercoiled poly(acrylate) backbone. Phthalocyanine pendants in a polymer, poly-…
Abstract A polystyrene‐ b ‐poly(2‐vinylpyridine) block copolymer containing a methylhydridosilane linking group was chemically grafted to an 8‐trichlorosilyloctene monolayer via a simple one‐step hydrosilylation reaction. The resulting Y‐shaped thin film exhibited a low grafting density, which was characteristic of th…
Abstract Summary: The crystallinity of a glycolysate obtained by glycolysis of PET with diethylene glycol (DEG) was qualitatively studied by optical microscopy using a polarizer and quantitatively by X‐ray diffraction. Moreover, the rheological behavior of this glycolysate was also studied in relation with its crystal…
Abstract The influence of combined 2,2,6,6‐tetra methylpiperidine 2‐hydroxyphenyl‐benzotriazole [1,3,5]triazine polymerizable stabilizers on the photostability of their copolymers with methyl methacrylate as well as the interaction of the photoreactive HALS and UV absorber fragments in the combined molecules have be…
Abstract An investigation on the effect of sulfonic group on solubility parameters and solubility behavior of poly(2,6‐dimethyl‐1,4‐phenylene oxide) (PPO) is presented. Sulfonated PPO (SPPO) was prepared using chlorosulfonic acid as a sulfonating agent. The structure of SPPO was confirmed by FT‐IR, and the ion exchang…
Abstract A new kind of AB 2 monomer, 4‐[2,6‐bis(3,4‐diaminophenyl)pyridin‐4‐yl]benzoic acid, was synthesized, and several hyperbranched polybenzimidazoles (HPBIs) were prepared through self‐polymerization followed by modification reactions with end‐capping reagents such as 4‐methyl benzoic acid and 3‐[3,5‐bis(trifluor…
Abstract In this study, polyvinyl alcohol/organically modified montmorillonite (HDA/MMT; organoclay) composite was prepared for the intercalation processes. Firstly, the rheological behavior of aqueous montmorillonite dispersions was investigated as a function of solid content. Hexadecylamine (HDA) was added to the mo…
Abstract The quasiliving characteristics of the ring‐opening polymerization of ϵ‐caprolactone (CL) catalyzed by an organic amino calcium were demonstrated. Taking advantage of this feature, we synthesized a series of poly(ϵ‐caprolactone) (PCL)–poly( L ‐lactide) (PLA) diblock copolymers with the sequential addition of…
Quick and accurate methods to calculate the mutual inductance of coaxial single layer coils remains important to this day in a large variety of engineering and physical disciplines. While modern finite-element electromagnetic field codes can do this accurately, the engineer often requires only a first- or second-order…
Abstract Nylon 6/carbon black conductive composites were prepared using two different methods, masterbatch dilution and melt mixing. Their effect on the size and distribution of carbon black agglomerates in the matrix was studied in terms of electrical and mechanical properties and morphology. The electrical resistivi…
Abstract The relationships between the pore size, fabric area density, and air permeability of the three‐dimensional (3D) nonwoven filter samples produced using a new 3D forming process has been studied. Results indicate that the thermally bonded nonwoven filter samples consist of multiple filtration layers of interco…
Abstract Ammonium polyphosphate (APP)/poly(butylene succinate) (PBS) composites were prepared with a unique water‐crosslinking technique to improve the flame retardancy and nondripping properties of the composites and to maintain the main structure of the composites during flame tests. The composites were treated with…
MOTIVATION: Accurate alignment of a target sequence to a template structure continues to be a bottleneck in producing good quality comparative protein structure models. RESULTS: Multiple Mapping Method (MMM) is a comparative protein structure modeling server with an emphasis on a novel alignment optimization protocol.…
Abstract To improve the mechanical properties and structure of poly(vinyl chloride) (PVC)/nano‐CaCO 3 nano composite, a core (nano‐CaCO 3 )/shell (SR) structured filler (40–60 nm) was successfully prepared by refluxing methyl vinyl silicone rubber (SR) and nano‐CaCO 3 particles (coupling agent KH550, KH560, or NDZ‐101…
Printed circuits: Aqueous polyacetylene dispersions were prepared by catalytic polymerization of acetylene in an aqueous emulsion with a cationic palladium catalyst with a bulky diphosphine ligand. Facile processing is demonstrated by ink-jet printing of the conductive-polymer dispersions to produce a functioning elec…
Abstract Trialkoxysilylated camphorsulfonamides have been used for the synthesis of functional organosilicas in a template‐directed hydrolysis‐polycondensation with tetraethylorthosilicate (TEOS). The sol–gel transformation leading to the formation of highly ordered materials indicates that trialkoxysilylated camphors…