Materials Literature
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ABSTRACT In this study, we synthesized a new class of copolymeric lattices based on vinyl pivalate (VPi) and modified oleic acid (OA) through a batch emulsion polymerization process. The effects of the chemically modified OA [methacrylated methyl oleate (MAMO)] on the thermal stability, glass‐transition temperature (…
Graphene sheets (GS) are at the forefront of electromagnetic interference (EMI) shielding/attenuation materials science research because of their excellent electrical properties (Wen B et al 2014 Adv. Mater. 26 3484 , Zhang Y et al 2015 Adv. Mater. 27 2049 ). GS/polyacrylate (PA) composites were prepared using a solve…
The present study examines the heating efficiency of a combination of manganese or cobalt ferrites in a binary (Co- or Mn-) ferrite nanoparticle form with magnetite, covered with citric acid to improve biocompatibility. The nanoparticle synthesis is based on the aqueous co-precipitation of proper salts, a facile, low-…
A versatile strategy is highly desired to prepare well-designed side chain liquid crystal polymers (SCLCPs). Two rigid and topological SiH/Vinyl-functionalized polystyrenes (PSs), namely poly(4-vinylphenyldimethylsilane) (PVPDMS) and poly(4-vinylphenyl-1-butene) (PVSt), were synthesized via anionic polymerization (AP)…
Dense (~98.5%), lithium aluminum silicate glass‐ceramics were obtained via the sinter‐crystallization of glass particle compacts at relatively low temperatures, that is, 790–875°C. The effect of P 2 O 5 on the glass‐ceramics' sinter‐crystallization behavior was evaluated. We found that P 2 O 5 does not modify the surf…
Abstract In this study the electrospinning of polyvinyl alcohol (PVA) was evaluated and optimized for minimum fiber diameter following Taguchi methodology. The effect of four factors including the solution concentration, voltage, flow rate and needle-collector distance each at 3 levels on fiber diameter were investiga…
Abstract The surface properties of polydimethylsiloxane (PDMS) were modified by treatment with an atmospheric pressure rotating plasma jet (APPJ) and the surface modifications were studied to assess its hydrophilicity and adhesion to acrylic adhesive tape intended for medical applications. Furthermore, the extent of h…
In the fine chemical and pharmaceutical industries, the operation of highly exothermic reactions with the autocatalytic features may lead to safety issues. From the safety point of view, identification of the autocatalytic features and the corresponding kinetics for a given reaction are of significant importance. In t…
Characteristics and gel properties of gelatin from goat skin, as influenced by extraction conditions, were studied. Yield of gelatin was 22.1–23.1% (wet weight basis). All gelatins contained α-chains as the predominant components, followed by β-chain. However, no β-chain was retained when extracted at 70C. Gelatin ext…
Abstract We evaluate the effects of high pressure during annealing on the structural and superconducting properties of Ag-doped FeSe bulks. The results obtained in this work indicate that the annealing at high pressure increases the critical temperature, upper critical field and irreversibility field due to the improv…
Cellulose-based paper is essential in everyday life, but it also has further potentials for use in low-cost, printable, disposable, and eco-friendly electronics. Here, a method is developed for the cellulose-mediated microwave sintering of Ag patterns on conventional paper, in which the paper plays a significant role…
Tallow amphopolycarboxyglycinate-stabilized silver nanoparticles: new frontiers in development of plant protection products with a broad spectrum of action against phytopathogens, Krutyakov, Yurii A, Kudrinskiy, Alexey A, Zherebin, Pavel M, Yapryntsev, Alexey D, Pobedinskaya, Marina A, Elansky, Sergey N, Denisov, Albe…
ABSTRACT We present a strategy for stabilizing the morphological integrity of electrospun polymeric nanofibers by heat stimuli in situ crosslinking. Amorphous polymer nanofibers, such as polystyrene (PS) and its co‐polymers tend to lose their fiber morphology during processing at temperatures above their glass transit…
Multiwalled carbon nanotubes (MWCNTs) and pharmaceutical compounds are classified by the US Environmental Protection Agency as contaminants of emerging concern, with significant research devoted to determining their potential environmental and toxicological effects. Multiwalled carbon nanotubes are known to have a hig…
Abstract New routes to vanadium sesquioxide and tantalum oxide nitride (γ- and δ-phase) are presented. Phase pure V2O3 with bixbyite-type structure, a metastable polymorph, was obtained from vanadium fluoride hydrates at ~750 K. It crystallizes in the cubic crystal system in space group I a 3 ¯ $Ia\bar 3$ with lattice…
Polyimides (PIs) crystallized from melts are promising thermally stable, heat-resistant plastics with high destruction viscosities. Nanocomposites that in turn serve as matrixes for carbon plastics can be obtained on the basis of PIs filled with carbon nanoparticles of various structures and morphologies. The presence…
Data from recent studies of polymer composites with nanosized silica particles are considered. A comparative analysis of current approaches to the description of concentration changes in the glass-transition temperatures of these systems is performed. The morphology of the surface layer in materials with nanoparticles…
The physicomechanical properties of polymer composites based on aramide fibers that are obtained by the wet-spinning technique with the use of epoxy binders are discussed. The chemical structures of reinforcing fibers and components of epoxy binders; the microstructures, surface structures, and some properties of aram…
Abstract We prepared polypropylene/organoclay nanocomposites by melt blending in a twin-screw extruder, exploring the domain of high screw speeds (up to 1 100 min−1). The samples were characterized at both microscale (size of agglomerates) and nanoscale (level of exfoliation). We show that, despite a satisfactory exfo…
In this work, a biodegradable linear‐dendritic copolymer composed of methoxypolyethylene glycols (mPEG) and a third generation glycolic acid oligomer based dendron is synthesized. The amphiphilic copolymer can self‐assemble into polymeric micelles in aqueous solution with a low critical micelle concentration (CMC). Hy…