Materials Literature
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Degradation of performance and life time of a functional material or device thereof is induced, to a great extent, by mass transfer in the material that is driven by various thermodynamic forces imposed intentionally or accidentally during its operation or service. The forces are any gradient of intensive thermodynami…
In order to separate the effects of a specific microbial species (Pseudomonas) in sea water on carbon steel, a comparative study of the corrosion and mechanical properties of AISI 1045 carbon steel in natural sea water, sterile sea water and Pseudomonas inoculated sea water was carried out using tensile testing, mass…
A novel polyurethane (PU) conducting composite film was developed by a simple coupling reaction route. The morphologies and structural characterization were conducted by means of FTIR, UV-vis, XRD, TEM, TGA and POM. The influence of the MWNTs-COOH loading amount and curing temperature on response was investigated. The…
Abstract In this work, the diffusivity of three different migrants is investigated in water plasticized polyamides, while changing humidity at a steady temperature, and also in dry polyamides tested at different temperatures close to the glass transition point (Tg). The effect of hydration on the structure and the bar…
LLDPE/LDPE blend films were prepared using a Brabender extruder by melt blending and blowing. The research results indicated that addition of LDPE has no significant effect on the melting temperature of LLDPE, but the crystallinity as well as spherulite size of the blends decreases. In addition, with increasing conten…
Abstract Water‐soluble, meta‐ and para‐linked poly(arylene ethynylene)s containing L‐aspartic acid‐functionalized fluorene units (P1 and P2) and their model compounds (M1 and M2) have been synthesized, and their photophysical properties and fluorescent sensing properties were investigated in aqueous solution. P1 and M…
Conventional transient finite-element methods (FEM) of magnetic field and electric circuit coupled problems often result in unbalanced power computation. In the worst case, the output power may be even miscomputed to be larger than the input power which violates all fundamental laws of physics. Eddy-current loss compu…
Possessing high H(2) capacities and interesting dehydrogenation behavior, metal amidoborane ammoniates were prepared by reacting Ca(NH(2) )(2) , MgNH, and LiNH(2) with ammonia borane to form Ca(NH(2) BH(3) )(2) ⋅2 NH(3) , Mg(NH(2) BH(3) )(2) ⋅NH(3) , and Li(NH(2) BH(3) )(2) ⋅NH(3) (LiAB⋅NH(3) ). Insight into the mecha…
A numerical dynamic and magneto-mechanical strong coupled model of linear magnetostrictive actuators was found. The model includes the magneto-mechanical coupling term, which reflects the strong coupling characteristic of magnetostrictive actuators. With this model, the dynamic magnetic and the mechanical problems can…
On the dot: A water-soluble single-source precursor has been used in the synthesis of CdS quantum dots passivated with a nucleotide in an aqueous one-pot reaction (see figure). The crystal structure of the decomposition product of a single-source precursor, 3-methyl-5-(1,2,3,4-tetrahydroxybutyl)oxazolidine-2-thione is…
Abstract Two new solvates of ginsenoside compound K (nonstoichiometric hydrate/CKH and methanol solvate/CKM) have been discovered and characterized in this paper. They were obtained through cooling crystallization in different solvents, and CKM could be prepared by transformation from CKH as well. The solvates were an…
Graphene is an attractive material for device applications, but device characteristics are very unstable because the graphene is very sensitive to environmental factors such as charges nearby the graphene, metal contacts, defects, contaminants and other adsorbates. Since the interactions between graphene and environme…
The polymer foam quality was enhanced significantly by modifying the structural and decomposition characteristics of chemical blowing agent (CBA), including the basic particle size, compatibility with the polymer matrix and gas yield. The submicrometer semicarbazide-covalently anchored polystyrene (SCPS) particles wer…
We analyzed the effect of etchants for metal catalysts in terms of the characteristics of resulting graphene films, such as sheet resistance, hall mobility, transmittance, and carrier concentration. We found the residue of $FeCl_3$ etchant degraded the sheet resistance and mobility of graphene films. The residue was i…
This paper presents an improved dynamic E&S vector hysteresis model to increase modeling accuracy under non-ellipticB-waveforms and describes its implementation to the finite element method (FEM). Since the dynamic E&S model is expressed via magnetic reluctivity and hysteresis coefficients modeling the vector hysteres…
A generalized methodology for the rigorous characterization of metafilms/metasurfaces through a set of electric and magnetic surface susceptibilities is presented in this paper. According to the novel formulation, the particle polarizabilities of the metafilm are extracted from theS-parameters of a normally incident p…
Abstract A Langevin dynamics simulation method is presented to create polymer networks. The properties of the network are found to depend on the interactions between segments of the precursor chains, the FJCs, and the excluded volume chains modelled by the repulsive WCA potential. The mean square displacements of the…
The present work investigated the characteristics and mechanism of corrosion product films and the corrosion rates of standard and microalloyed ‘antisulphur’ steels in H2S/CO2 containing oilfield environments at various temperatures. The resistance of antisulphur steels to CO2/H2S corrosion was highlighted to provide…
The melt flow behaviours of low-density polyethylene (LDPE)/palm kernel shell (PKS) composites were studied. Acrylic acid (AA) was used as a chemical modifier for PKS. The effect of filler loading and the presence of AA in melt flow behaviour of composites were determined. The melt flow index of the composites decreas…
In this paper, two-dimensional finite element analysis (FEA) is used to compute the electric field in stator slot of a synchronous motor. The electrical insulation between the conductors and the edges of slot is evaluated. The relationship between size of air gap and electric field in this air gap is discussed. Second…