Materials Literature
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Injection molding is one of the most extended polymer processing technologies. It enables the manufacture of final products, which do not require any further operations. The tools used for their production – the injection molds – are very complicated assemblies that are made using several technologies and materials. D…
Underground oil pipelines are made of pressurized pipes, and when damage occurs, the consequences can be disastrous. Pipeline accidents caused by stress can be attributed to material corrosion, impractical design, manufacturing defect, environmental damage, and man-made destruction. In this study, by utilizing the str…
Abstract We designed efficient precursors that combine complementary associative groups with exceptional binding affinities and thiocarbonylthio moieties enabling precise RAFT polymerization. Well defined PS and PMMA supramolecular polymers with molecular weights up to 30 kg mol−1 are synthesized and shown to form hig…
For the purpose of corrosion resistance improvement and wear reduction of protective composite coatings, methods of their formation on magnesium alloys were developed using plasma electrolytic oxidation and electrophoresis precipitation of superdispersed polytetrafluoroethylene (SPTFE). There was carried out a complex…
A dual-input boost-buck converter with coupled inductors (DIBBC-CI) is proposed as a thermoelectric generator (TEG) power conditioner with a wide input voltage range. The DIBBC-CI is built by cascading two boost cells and a buck cell with shared inverse coupled filter inductors. Low current ripple on both sides of the…
An innovative spray deposition technique has been applied to produce in situ TiB2/Zn-30Al-1Cu composites. The microstructures of the spray-deposited composite were studied using optical microscopy, scanning electron microscopy, and X-ray diffraction. Both theoretical and experimental results have shown that the TiB2 p…
A novel computational model is presented for the representation of polycrystalline grain structures and crystal plasticity finite element model are used to investigate size effect due to grain orientation and number of grains through the thickness, in term of activity of slip system, roll force and the scatter involve…
This preliminary study developed a novel cellulose pretreatment method for cost-effective cellulosic utilization using a modified cuprammonium solution as a solvent to dissolve cellulose followed by molecular oxygen/Fenton depolymerization. The modified cuprammonium solution is composed of cuprammonium solution and a…
In this paper, a controller based on error and the inverse segmented model, is used to control the position of an SMA actuator. First an inverse model using three segments for both heating and cooling processes is built and experiments are used to validate the model and to identify the parameters. Then a controller, w…
Chitosan is an interesting polysaccharide, which can be easily derived from chitin by deacetylation. Chitin is widely found in nature as a major component of the cell wall of shells of insects and crustaceans, among other animal or even botanic species. The most distinguishing chitosan properties are its biodegradabil…
In this study, polymer nanocomposites of isobutylene–isoprene rubber blended with sodium–montmorillonite were prepared using latex and co-coagulating methods and their influence on thermal, mechanical, and gas barrier if isobutylene–isoprene rubber composites were compared. The dispersion of the layered silicates in t…
Based on two promising p -CPhH 4 IDC and o -CPhH 4 IDC ligands, one 2D coordination polymer, [Ca( p -CPhH 2 IDC)(H 2 O)] n ( p -CPhH 4 IDC = 2-(4-carboxylphenyl)-1 H -imidazole-4,5-dicarboxylic acid) ( I ) and one novel dimeric complex, [Cd 2 ( o -CPhH 2 IDC) 2 (H 2 O) 6 ] · 4H 2 O ( o -CPhH 4 IDC = 2-(2-carboxylpheny…
In this study, we synthesized carboxymethyl chitosan-graft-poly(ε-caprolactone) (CMCS-g-PCL) by grafting ε-CL onto the hydroxyl groups of CMCS via ring-opening polymerization. The graft copolymers were characterized by 1H NMR spectroscopy and thermogravimetric analysis (TGA). Then use the graft copolymer to produce th…
In last years, due to the high prevalence of bone defects caused by disorders and injuries, several biomaterials have been developed to be used as bone substitutes [1]. To improve the chemical similarity between these substitutes and bone inorganic part, osteoconductive P2O5 glass-reinforced hydroxyapatite (GR-HA) com…
A co-polymerizable dendron of first generation synthesized from behera amine was homopolymerized and copolymerized with commercial monomers such as styrene, methyl methacrylate, and N-vinyl pyrrolidone. Characterization of the co-polymers was performed and it was found with the help of FT-IR and proton and carbon NMR…
The quantitative content of germanium, arsenic, and selenium in As1–x Se x , Ge1–x Se x , and Ge1–x–y As y Se x (As y (Ge1–z Se z )1–y ) glassy alloys has been determined by X-ray fluorescence analysis with fluorescence excitation by bremsstrahlung X-rays and an electron beam. The use of these techniques has made it p…
The crystallographic characteristics of the design elements of a metamorphic high-electron-mobility (MHEMT) heterostructure with an In 0.4 Ga 0.6 As channel are determined based on reciprocal space mapping. The heterostructure is grown by molecular beam epitaxy on the vicinal surface of a GaAs substrate with a deviati…
Surface properties of biopolymers are crucial for providing topographical and chemical cues to affect cellular behaviors, such as attachment, spreading, viability, proliferation, and differentiation. As an effective surface modification technique, plasma treatment is often applied to enhance surface wettability, adhes…
Metal wires (typically made of W or Ta) serve as catalysts to decompose the precursor gases to form reactive species in the technique of catalytic chemical vapor deposition. The reactions of these reactive species with the heated wire cause structural changes in the wire, which affect its catalytic properties and life…
Titanium and its alloys are widely used in orthopaedic and dental implants due to their mechanical properties and high corrosion resistance. It is known that porous metals can increase the in vivo lifetime of metallic implants by decreasing the effective Young’s modulus of implant material to match that of bone as wel…