Materials Literature
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Abstract A preceramic polymer for SiBNC fiber, polyborosilazane, has been synthesized by one‐step condensation reaction of dichloromethylsilane, BCl 3 , and hexamethyldisilazane with high yield. The reaction mainly involves the condensation of SiCl and BCl with NSiMe 3 followed by SiMe 3 Cl evaporation and dehyd…
This study concerns an experimental investigation of room-temperature creep at different stresses in polycrystalline ${\text{LaCoO}}_{3}$-based oxides under compression. A phenomenological approach for ferroelastic creep is proposed to identify the most important parameters that affect creep strain over different time…
Dissipative particle dynamics (DPD) simulation technique is an effective method targeted on mesoscopic simulations in which the interactions between particles are soft. As a result, it inevitably causes bond crossing and interpenetration between particles. Here we develop a practical method based on the two-dimensiona…
ABSTRACT The response surface methodology (RSM) was used in the optimization of a modified recipe of almond paste cookies to pinpoint the best combination of the most important factors, in order to obtain an enhanced product with quality characteristics similar to the typical one. In this modified recipe, bamboo fiber…
Abstract Reactions between hydroxyl‐terminated glycidyl azide polymer (GAP) and different isocyanate curatives such as toluene diisocyanate (TDI), isophorone diisocyanate (IPDI), and methylene diicyclohexyl isocyanate (MDCI) at various temperatures viz. 30, 40, 50, and 60°C were followed by Fourier transform infra red…
A flux-assisted thermal conversion route to the pore-free high crystallinity magnesium borate (Mg 2 B 2 O 5 ) nanowhiskers with a length of 0.47−3.0 μm, diameter of 50−240 nm, and aspect ratio of 5−36 at a relatively low temperature of 650−700 °C (200−350 °C lower than that needed via the traditional method) was devel…
Abstract In this study, biodegradable rigid cellular materials were synthesized from the reaction of malonic acid with epoxidized soybean oil. Malonic acid reacts with two epoxy groups to give a network polymer. In the course of this reaction, initially formed malonic acid monoester (MAME) can decarboxylate and produc…
Abstract The isothermal and nonisothermal crystallization behavior of Nylon 12 was investigated using differential scanning calorimetry (DSC). An Avrami analysis was used to study the isothermal crystallization kinetics of Nylon 12, the Avrami exponent ( n ) determined and its relevance to crystal growth discussed and…
Multiwalled carbon nanotube (MWNT) microspheres were fabricated by layer-by-layer (LBL) assembling of modified MWNTs and poly(diallyldimethylammonium chloride) (PDDA) via electrostatic interactions on poly(methacrylic acid) (PMAA) microspheres and subsequent calcination. The MWNT/PDDA film growth on planar substrates…
Abstract Crystal growth in solution is a surface‐controlled process. The variation of growth rates of different crystal faces is considered to be due to the molecular arrangement in the crystal unit cell as well as the crystal surface structures of different faces. As a result, for some crystals, the growth rate for a…
A simple catalytic system that uses commercially available manganese(II) perchlorate as the catalyst and peracetic acid as the oxidant is found to be very effective in the epoxidation of aliphatic terminal alkenes with high product selectivity at ambient temperature. Many terminal alkenes are epoxidised efficiently on…
Abstract Two new inorganic–organic hybrid germanotungstates built from trivacant Keggin fragments and in situ generated hexanickel clusters [Ni(en) 2 ] 0.5 [{Ni 6 (μ 3 ‐OH) 3 (en) 3 (H 2 O) 6 }(B‐α‐GeW 9 O 34 )] · 3H 2 O ( 1 ) and [{Ni 6 (μ 3 ‐OH) 3 (dap) 3 (H 2 O) 6 }(B‐α‐GeW 9 O 34 )] · H 3 O · 4H 2 O ( 2 ) (en = et…
Abstract The effects of the filler loading and aging time on the mechanical and electrical conductivity properties of natural rubber were investigated. In this work, carbon black (type N220) was used as a filler, and its loading was varied from 0 to 50 phr. The mechanical properties (e.g., the tensile strength and cat…
Numerical simulations of time-dependent thermal energy transport in semiconductor thin films are performed using the lattice Boltzmann method applied to phonon transport. The discrete lattice Boltzmann Method is derived from the continuous Boltzmann transport equation assuming nonlinear, frequency-dependent phonon dis…
Al-doped ZnO films were grown on glass substrates by the pulsed-laser deposition technique with varying substrate temperatures. The optical band gap decreases from 3.64 to 3.46 eV as the substrate temperature increases from 350 to 450 °C, illustrating the increase in Al content in the context of a degenerate semicondu…
Water-soluble chitosan (WCS) with five different molecular weights was synthesized by N-acetylation of chitosan with acetic anhydride. Degree of deacetylation of sample was determined by potentiometric titration. The structure of WCS was characterized by FTIR, XRD, and gel permeation chromatography. The critical aggre…
Monodisperse Pt nanoparticles (NPs), 3−5 nm in diameter, were synthesized by the formic acid reduction of H 2 PtCl 6 at 80 °C. They were used to decorate single- and multiwalled carbon nanotubes (CNTs), previously sonicated in deionized water, via high surface density self-organization at room temperature. The surface…
The morphology evolution of poly(styrene−ethylene/butylene−styrene) monolayer thin films upon “annealing” in the vapor of cyclohexane, a selective solvent for majority poly(ethylene/butylene) block, was investigated by atomic force microscopy (AFM). The pathway information on the two-dimensional ordering from poorly o…
The crystallization kinetics of mullite formation in a diphasic precursor consisting of a silicone resin filled with commercial γ‐alumina nanoparticles (15 nm mean particle size, specific surface area of 100 m 2 /g), heated in air from 1250° to 1350°C, was studied by X‐ray diffraction. Transitional γ‐alumina and amorp…
We present a numerical method that consistently implements thermal fluctuations and hydrodynamic interactions to the motion of Brownian particles dispersed in incompressible host fluids. In this method, the thermal fluctuations are introduced as random forces acting on the Brownian particles. The hydrodynamic interact…