Materials Literature
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Abstract In this work, poly(ethylene oxide) (PEO)/organoclay nanocomposites with three different types of nanoclays (Cloisite 30B, Somasif JAD400, and Somasif JAD230) were prepared by melt mixing with a laboratory kneader followed by compression molding. The nanocomposites were characterized by atomic force microscopy…
The total synthesis of protoporphyrin IX and its disodium salt using a new alternative method to the classical MacDonald condensation is reported. The key step is the reaction of the new unsymmetrical diiodo dipyrrylmethane 1 with the known dipyrrylmethane 2 . Coupling of the two fragments leads directly to porphyrin…
Abstract The comparison of the degree of crystallinity and the micromechanical properties in the blends of recycled amorphous poly(ethylene terephthalate) (PET) with isotactic polypropylene (iPP) and high‐density polyethylene (HDPE) with a compatibilizer in different proportions is reported. The physical study of the…
The objective of this work is to investigate the effects of different chemical blowing agents (CBAs) and processing conditions on the cellular structure of foamed metallocene polyethylene and characterize an appropriate blowing agent. An experimental study was conducted to produce metallocene polyethylene foams in dry…
Abstract Shape memory polymers (SMPs) can keep a temporary state and subsequently recover to the original shape through a prescribed thermomechanical process. Although different theoretical models have been presented, the viscous effects were seldom considered. This article aims to provide an insight into the viscoela…
Poly(p-phenylenevinylene) (PPV) was chemically synthesized via the polymerization of p-xylene-bis(tetrahydrothiophenium chloride) monomer and doped with H(2)SO(4). To improve the electrical conductivity sensitivity of the conductive polymer, Zeolites Y (Si/Al = 5.1, 30, 60, 80) were added into the conductive polymer m…
Abstract The dynamic rheological and mechanical properties of the binary blends of two conventional high‐density polyethylenes [HDPEs; low molecular weight (LMW) and high molecular weight (HMW)] with distinct different weight‐average molecular weights were studied. The rheological results show that the rheological beh…
We present the results of muon-spin relaxation and heat capacity measurements on ${\text{LiFeSi}}_{2}{\text{O}}_{6}$ and ${\text{NaFeSi}}_{2}{\text{O}}_{6}$. In synthetic samples of both compounds we see a single muon oscillation frequency consistent with commensurate magnetic structures below ${T}_{\text{N}}$. In con…
The fabrication of three-dimensional fine-scale microdot arrays of organized mesoporous hybrid organosilicas by the coupling of inkjet printing (IJP) and Pluronic F127 driven evaporation-induced self-assembly (EISA) in the presence of cocondensed silica and organosilica precursors is demonstrated. The mesoorganization…
Abstract In situ polymerization of P3OT with SWCNT is carried out in the presence of a FeCl 3 oxidant in a chloroform medium. The characterization of the composites is performed with FTIR, Raman, 1 H‐NMR, UV–Vis, PL spectroscopy, XRD, SEM, TEM, and conductivity measurements. The change (if any) in CC symmetric and an…
Thin nematic films deposited on liquid substrates provide a unique situation to investigate coalescence: the whole process can be followed under microscope over a wide range of times, and temperature allows us to monitor the surface viscosity of the surrounding fluid. For the first time, the complete scenario of 2D co…
The new zinc porphyrin/tungsten alkylidyne dyad Zn(TPP)-C[triple bond]CC(6)H(4)C[triple bond]W(dppe)(2)Cl (1) possesses novel photophysical properties that arise from a tunable excited-state triplet-triplet equilibrium between the porphyrin and tungsten alkylidyne units. Dyad 1 exhibits (3)(d(xy) <-- pi*(WCR)) phospho…
New sports product innovations are rapidly developed and brought to market by the manufacturers in order to accommodate the diverse needs and changing personal preferences of the users. Over the years, this has resulted in a shorter life cycle of sports products and increased disposal rates and waste. Also, advances b…
Abstract Novel low refractive index fluorinated polymers were prepared from perfluoroalkylsilane and polyethoxysiloxane by a sol‐gel technique for antireflection applications. Perfluoroalkylsilane having low refractive index fluoroalkyl groups incorporate polyethoxysiloxane by condensation of their siloxane groups to…
Nanoparticulate zirconium tungstate prepared through hydrothermal methods was found to autohydrate under ambient conditions. This results in positive thermal expansion, limiting its usefulness for controlled thermal expansion composites. TEM and BET studies provided strong evidence that the cause of autohydration is a…
All Zn1−x Er x O (x=0.04, 0.05, and 0.17) films deposited on glass substrates by radio-frequency reactive magnetron sputtering exhibit the mixture of ferromagnetic and paramagnetic phases at room temperature. The estimated magnetic moment per Er ion decreases with the increase of Er concentration. The temperature depe…
By introducing mixed ligands into the hexaniobate system, three novel organic−inorganic hybrids, [Cu(en) 2 ] 2 {[Cu(1,10-phen)][Cu(1,10-phen)(H 2 O)]Nb 6 O 19 }·10.5H 2 O ( 1 ), [Cu(en) 2 ] 2 {[Cu(2,2′-bipy)][Cu(2,2′-bipy)(H 2 O)]Nb 6 O 19 }·9H 2 O ( 2 ) and [Cu(1,2-dap) 2 ] 2 {[Cu(2,2′-bipy)][Cu(2,2′-bipy)(H 2 O)]Nb…
Abstract Nickel oxide (NiO) nano particle is synthesized by Ultrasound assisted one pot method and thus synthesized nano NiO is mixed with poly(vinyl alcohol) (PVA) to prepare the PVA/NiO nanocomposite. The influence of the composition on the structural modification on the composite is evaluated. The particle size and…
A method for rendering bundle beams by utilizing the destructive interference effects of beams from multiple subwavelength slits surrounded by dielectric surface gratings is proposed. With oblique incident light on the multiple slits, it is possible to control the phases of surface plasmon polaritons (SPPs) induced in…
We present density-functional theory calculations of the electron spin resonance $g$ and hyperfine coupling $\mathbit{A}$ tensors in cluster models of a positively charged oxygen vacancy ${V}_{\text{O}}^{+}$ in semiconducting tin dioxide, ${\text{SnO}}_{2}$. Convergence of the results with the cluster size, basis set,…