Materials Literature
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Polyelectrolyte (PE) multilayer (PEM) thin films prepared by layer-by-layer self-assembly on flexible substrates are exposed to elongation in many fields of technology. Upon elongation, these types of films are showing interesting, but not understood, phenomena, such as controlled wetting, stimuli-responsive nanovalve…
Abstract BACKGROUND: The valorization of renewable agro‐industrial residues and their further utilization for production of polymers and polymer additives is a highly attractive alternative for replacement of oil‐based materials. RESULTS: Liquefied wood flour and rice bran derived esters were synthesized and evaluated…
Ab initio wavefunction and density functional theory calculations have been performed to investigate the second-order nonlinear optical (NLO) properties of the bis{4-[2-(4-pyridyl)ethenyl]benzoato}-zinc(II) metal–organic framework (MOF). This has been carried out by adopting the supramolecular or cluster approach, whi…
Abstract Aromatic poly(benzoxazole)s are a class of rigid‐rod conjugated polymers. However, their poor solubility in organic solvents limits potential applications. Thus, a good method that can address this dilemma is needed, given that existing methods involve models with either poor solubility but good thermal stabi…
The conformation of a linear gradient copolymer chain in a homopolymer melt is investigated using theory and numerical solutions of self-consistent field equations. In the limit of large comonomer immiscibility and chain length, it is found that the copolymer collapses into a globule with monomers self-assembled into…
Abstract The volume resistivity of carbon black (CB)‐filled crosslinked styrene‐butadiene rubber (SBR) samples cured in two steps and having a fixed elongation condition declined slightly when the elongation ratio (α) was 3 or smaller, whereas the value increased markedly at α = 4. Three‐dimensional transmission elect…
Organoalumoxanes containing yttrium oxane groups, hydrolytically stable in air, and soluble in organic solvents have been synthesized for the first time. The composition of the yttrium-containing organoalumoxanes has been determined by 1 H and 27 Al nuclear magnetic resonance spectroscopy, IR spectroscopy, scanning el…
The hexagonal multiferroic LuMnO${}_{3}$ transforms to the $P{6}_{3}cm$ symmetry upon entering the ferroelectric phase. Using neutron diffraction and the pair density function analysis, it is shown that short-range local atomic distortions are present, calling for a lower symmetry, such as the $P{6}_{3}$, for the foll…
Abstract Polysulfone (PSF) microspheres with a hollow core/porous shell structure were prepared by a water‐in‐oil‐in‐water emulsion solvent evaporation method. The morphology of PSF could be controlled by variation of the surfactants, which included oleic acid, poly(vinyl pyrrolidone), and tween 80. The three kinds of…
We have constructed the T - x phase diagram of the TlGaS 2 -TlFeS 2 system (simple eutectic system, eutectic at 80 mol % TlFeS 2 with a melting point of 953 K). The system contains limited series of monoclinic solid solutions based on the ternary end-members. At an annealing temperature of 933 K, the TlGaS 2 -based so…
A new compoud based on carbazole functionalized β-diketone-boron difluoride ( 1 ) was synthesized. It is found that compoud 1 can gel toluene, ethylbenzene and some mixed solvents, and 3D networks consisting lots of nanofibers were observed using SEM and fluorescence microscopy. The molecular packing model in xerogel…
In contrast to advancements in the fabrication of new superhydrophobic materials, the characterization of their water repellency and quality is often coarse and unsatisfactory. In view of the problems and inaccuracies, particularly in the measurement of very high contact angles, we developed alternative methods for th…
Polyglycerol dendrimers (PGDs), which exhibit a well-defined structure consisting of only glycerol units, were examined as a host molecule of 5-fluorouracil (5-Fu) used as a model anticancer drug. (19)F- and (1)H-NMR titrations and fluorescence measurements were performed to estimate the molecular interaction between…
Abstract Ethylene‐octene copolymer (EOC) was irradiated using electron beam irradiation at different dosages (30, 60, 90, and 120 kGy). Effect of irradiation dosage on thermal and mechanical properties was studied. When compared to low density polyethylene, EOC exhibited higher degree of crosslinking reflected in incr…
Abstract This article investigates the transport behavior of three aromatic organic solvents, viz. benzene, toluene, and xylene in natural rubber (NR) composite membranes containing peanut shell powder (PSP) as filler at different temperatures by conventional weight‐gain experiments. PSP used in compounding the NR was…
Abstract Scanning electron microscopy (SEM) was employed to investigate crack initiation and propagation process in notched and unnotched Izod impact fracture surfaces of the cellulose nanofiber (CNF) and microfibrillated cellulose (MFC)‐filled polypropylene (PP) composites compared with microcrystalline cellulose (MC…
Purpose The purpose of this paper is to study the manufacturing of SAC 305 solder paste with multiwall carbon nanotubes (MWCNT) before and after structure modification and also to investigate the added carbon nanotubes' influence on the technological properties and the microstructure of “nano” solder pastes. This work…
Progress in systematic development of a thermodynamic database for Mg alloys with 21 components is reported. Models for multicomponent alloys are built in a methodical approach from quantitative descriptions of unary, binary and ternary subsystems. For a large number of ternary—and some higher—alloy systems, an evalua…
Ca 2.8 Ln 0.2 Co 4 O 9 + δ (Ln = La, Nd, Sm, Tb-Er) solid solutions have been prepared via a citrate route and their structural parameters have been determined. Their thermal expansion, thermoelectric power, thermal conductivity, and electrical conductivity have been measured above room temperature. The results demons…
Abstract Poly( L ‐lactide) (PLLA) and poly( L ‐lactide‐ co ‐glycolide) (78/22)0 [P(LLA‐GA)] were phase‐separated in PLLA/P(LLA‐GA) blends, forming independent domains and thence crystallizing separately. The crystallization of PLLA was not disturbed or delayed by the presence of P(LLA‐GA) and vice versa. PLLA and poly…