Materials Literature
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This chapter contains sections titled: Introduction Sapphire structure Sapphire crystal growth Corundum crystal defects Applications Brief crystal-growth technique characterization Conclusion References Appendix: sapphire physical properties
Degradable polyacrylamide (PAAm) was prepared by incorporating temperature-sensitive azo groups into the polymer backbone. Ceric ions (Ce(IV)) and 2,2′-azobis[2-methyl- N -(2-hydroxyethyl)propionamide] were used as a redox couple to initiate the polymerization of acrylamide. The presence of azo groups in the backbone…
Abstract An acidic Cs salt of H4SiW12O40 (Cs3HSiW12O40), which was prepared by titrating an aqueous solution of H4SiW12O40 with an aqueous solution of Cs2CO3, possessed only micropores and exhibited size-selective catalysis for acid-catalyzed reactions in liquid phase.
Abstract BACKGROUND: Owing to difficulties in catalyst recovery from slurries the deposition of a catalyst on suitable supports has been investigated extensively in recent years. The support material and the method of coating influence the activity. Photocatalytic decolorization of methyl orange (MO) and Rem Red F3B (…
Abstract The viscosity, loop tack, and shear strength of silica‐filled epoxidized natural rubber (ENR 25 and ENR 50 grade) adhesive were investigated using coumarone‐indene as the tackifying resin. Silica loading was varied from 10–50 parts per hundred parts of rubber (phr), whereas the coumarone‐indene concentration…
A numerical study is performed on the thermal and electrochemical characteristics of a tubular solid oxide fuel cell (SOFC) employing the steam reforming of biogas in each individual cell unit but indirectly from the anode. The numerical model used in this study takes account of momentum, heat, and mass transfer in an…
Amorphous metastable alloy of nominal composition ${({\text{Fe}}_{0.5}{\text{Cu}}_{0.5})}_{87}{\text{Zr}}_{13}$ has been synthesized by high-energy ball milling. The alloy exhibit a ferromagnetic behavior with a Curie Temperature of ${T}_{\text{C}}=255\text{ }\text{K}$, as determined from low-field measurements wherea…
Abstract Azlons are increasingly concerned for their excellent performance properties and biodegradation. A kind of novel azlon, zein/viscose textibe fibers, were fabricated by wet‐spinning of zein and cellulose sulfonate blended solution. Some parameters that determine the fabrication process were optimized. The stru…
Abstract Organic nanoparticles as heterogeneous nucleators have a great effect on the crystallization of polymer matrices in nanocomposite systems, and the effect will be enhanced under shear flow. A home‐made dynamic‐packing injection molding (DPIM) device was developed to explore the effect of organic clay on the sh…
Abstract Methoxypoly(ethylene glycol)‐grafted poly(β‐amino ester) was synthesized for the fabrication of pH‐sensitive micelles, and these micelles were modified with deoxycholic acid to facilitate the hydrophobic interaction between the micellar core and paclitaxel. The micelle properties were studied by dynamic light…
The feasibility of edge-functionalization of graphite was tested via the model reaction between pyrene and 4-(2,4,6-trimethylphenyloxy)benzamide (TMPBA) in poly(phosphoric acid) (PPA)/phosphorous pentoxide (P(2)O(5)) medium. The functionalization was confirmed by various characterization techniques. On the basis of th…
Abstract Styrene–maleic anhydride copolymer (SMA) with higher MA content (21.8 wt %) than reported SMA (mostly 8 wt %) was used as a compatibilizer for poly(2,6‐dimethyl‐1,4‐phenylene oxide) (PPO)/polyamide 6 (PA6) blends by in situ formed PA‐ g ‐SMA during melt processing. The tensile strength and flexural strength o…
Abstract The adsorption of 2‐amino‐5‐cyanopyridine (2‐ACP) was investigated in solution at different pH values by i n situ surface‐enhanced Raman scattering (SERS) spectroscopy combined with the electrochemical method. The assignments of the main bands were first performed on the basis of the spectral features of simi…
The electronic spin-orbit coupling in carbon nanotubes is strongly enhanced by the curvature of the tube surface and has important effects on the single-particle spectrum. Here, we include the full spin-orbit interaction in the formulation of the effective low-energy theory for interacting electrons in metallic single…
The H-terminated polycrystalline diamond thin film surface is photochemically functionalized using allylamine. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) aided by principal components analysis (PCA) is then employed to systematically elucidate (i) the photochemical grafting of trifluoroacetamide group p…
Abstract The effect of electron beam irradiation on the structural and optical properties of Poly‐Allyl‐Diglycol‐Carbonate CR‐39 solid state nuclear track detector was investigated. Samples from CR‐39 detector were irradiated with electron beam with doses at levels between 10 and 140 kGy. The structural and optical mo…
Abstract The mechanical behavior of acrylonitrile butadiene rubber (NBR) – organo modified layered silicate was modeled using Design of Experiments (DoE). Response surface methodology (RSM), a DoE tool was used to optimize the formulations for optimal performance of the nanocomposites. A Box‐Behnken design with three…
A method for estimating the positional displacement of protein bound gold nanoparticles is presented and used to estimate the rigidity of linkage of Au(144) nanoparticles bound to a tetrameric model protein. We observe a distribution of displacement values where most Au(144) clusters are immobilized to within 3Å relat…
Abstract In this study, maleinized soybean oil triglycerides (SOMA) were reacted with epoxidized soybean oil triglycerides (ESO) to give plant oil‐based thermoset polymers. To increase fracture toughness of the product, different amounts of SOMA was replaced by maleic anhydride grafted polypropylene (MMPP) (Epolene E4…
Abstract Recycled polyamide 6 (PA6) cloth was used as the only raw material to prepare single polymer composites (SPC) by partially melting the PA6 fibers. During the process, part of PA6 fibers was melted to fill the gap between the remained fibers at a temperature in the melting temperature range of fibers. The matr…