Materials Literature
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Abstract The first‐principles full‐potential linearized augmented plane‐wave method based on density functional theory is used to investigate electronic structure and magnetic properties of I A subgroup elements with nitrogen (LiN, NaN, KN, and RbN) in assumed three types of crystalline structure (rock salt, wurtzite,…
A wholly ab initio method for deriving chemical thermodynamic data for inorganic crystals is a useful tool for theoretical research in material science. In this work, all electron density functional computations together with phonon vibrational analysis were used to derive thermodynamic profiles of two polytypes of Si…
Methyl methacrylate-butadiene-styrene (MBS) were prepared by emulsion polymerization method through grafting of styrene (St) and methyl methacrylate (MMA) with varied ratio on polybutadiene (PB) particles. The effect of St/MMA weight ratio of the shell in MBS on the property of PVC/MBS blends was investigated. It was…
Thin laminates (thickness δ = 20–45 nm) of barium titanate, BaTiO3 (BT), have been synthesised by the sol–gel method followed by heating of the amorphous precursor powder in air. An orthorhombic BT polymorph forms along with a tetragonal phase (t-BT) after 2 h of heating the precursor at 600°C, as evidenced by a well-…
Needle-punched nonwoven fabrics were made from 100% jute fiber using various levels of fabric weight, punch density, and depth of needle penetration. The number of variables and their combinations in the experimental plan were selected following a statistical experimental design technique. Various tensile responses or…
Soy protein isolate has been cross-linked with furfural, a bio-based aldehyde and blended with an organoclay Cloisite 30B. The cross-linking process has been ascertained from FTIR data. The structure and apparent interlayer spacing of the SPI/ MMT nanocomposites prepared via solution intercalation has been detected by…
An amino-acid-based hydrophobically modified biocompatible copolymer, poly[(sodium N-acryloyl-L-valinate)-co-(N-octylacrylamide)] was synthesized and characterized. Techniques such as fluorescence probes, DLS, and TEM were used to investigate its aggregation behavior in aqueous solution. The copolymer was observed to…
Two new organic–inorganic hybrid cobalt-molybdovanadates [Co(phen)3]H2[H2V2Mo6O26] · 7H2O (1) and [Co(2,2′-bipy)3][Na(H2O)7][VMo12O40] (2) have been hydrothermally synthesized and structurally characterized by elemental analyses, IR, UV, XPS spectroscopy, thermogravimetric (TG) analyses, and X-ray single crystal diffr…
A physical mechanism of micelle formation in homopolymer systems is elucidated. The mechanism is applicable in particular to melts of stereoisomeric polymers, for example, polystyrene. It is hinged on aggregation and crystallization of occasional atypical stereoregular fragments of mostly irregular (atactic) polymer c…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
A newly developed pure-rolling fatigue test rig with three contact points for bearing balls was used to perform rolling-contact fatigue (RCF) tests. The fatigue properties of GCr 15 steel balls and two kinds of Si 3 N 4 ceramic balls (GSN-200 and NBD-200) produced with different technologies were compared. Life test d…
Polymethyl methacrylate (PMMA) was blended with ethylene methacrylate (EMA) copolymer in different compositions by melt mixing technique using Haake Rheochord twin screw extruder. The physico-mechanical, thermal, optical and chemical properties of PMMA/EMA blends were investigated with special reference to the blend c…
We have prepared four tetraaryl derivatives of 3,6-dimethylene-1,2,4,5-tetraoxocyclohexane (aryl = Ph; 4-MeOPh; 4-Me(2)NPh; and 3,5-(t-Bu)(2)-4-MeOPh) with guidance from an earlier reported ab initio analysis (Misiolek, A. W.; Jackson, J. E. J. Am. Chem. Soc. 2001, 123, 4774-4780). These electron acceptors may be chem…
The quantitative structure–property relationship approach was performed to study the nematic transition temperatures (T N) in thermotropic liquid crystals. The multi-linear regression analysis (MLRA) and artificial neural networks (ANNs) were employed to develop linear and nonlinear models, respectively. The proposed…
The peculiar electronic and structural properties of elemental boron are studied with first principles calculations including both density functional theory and wave-function based approaches. Interaction between boron and atomic hydrogen and lithium, is considered. In particular trapping a hetero-atom, such as hydrog…
Water-based nanocomposite was synthesized using in-situ polymerization of Methyl Methacrylate. Nano-CaCO3 was added during polymerization along with aqueous solution of surfactant. Quantity of nano-CaCO3 was varied as 0, 2 and 4% of monomer quantity. XRD gram shows the presence of nano-CaCO3, which causes the crystall…
Polypyrrole hexagonal microplates (PHMs) (50-100 microm long, 10-20 microm wide, and 0.8-1.2 microm thick) with a quasicrystalline structure and high electrical conductivity (up to 400 S/cm) are simply fabricated using single crystals of 4-sulfobenzoic acid monopotassium salt (KSBA) in aqueous medium. Moreover, the fa…
Abstract BACKGROUND: Wholly aromatic polyamides (aramids) are high‐performance polymeric materials with outstanding heat resistance and excellent chemical stabilities due to chain stiffness and intermolecular hydrogen bonding of amide groups. Synthesis of structurally well‐designed monomers is an effective strategy to…
A pressure-sensitive, nonreacting and nonfouling adhesive which can perform well both in air and underwater is very desirable because of its potential applications in various settings such as biomedical, marine, and automobile. Taking a clue from nature that many natural adhesive pads have complex structures underneat…
Abstract The miscibility of poly(vinyl chloride) (PVC) and poly(ethylene oxide) (PEO) blends was investigated by using differential scanning calorimetry (DSC), refractive index measurements and x-ray diffraction (XRD) analysis. The negative Flory-Huggins interaction parameter, χ 12 from the melting point depression of…