Materials Literature
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The thermal insulation properties of thermoplastic polyurethane elastomer nanocomposites were characterized at different heat fluxes. Thermoplastic polyurethane elastomer was modified with different loadings of montmorillonite nanoclays and carbon nanofibers (CNFs) via twin screw extrusion processing. The addition of…
A coupled thermo-mechanical model is presented for calculating the compressive strength and failure of polymer laminated composites with thermal barrier when exposed to fire. Thermal barriers are used to protect composite structures from fire, and this article presents a model for calculating the improved structural s…
Atomic pair distribution functions are useful because they have an easy intuitive interpretation and can be obtained both experimentally and from computer-generated structure models. For bulk materials, atomic pair distribution functions are solely determined by the intrinsic atomic geometry, i.e., how atoms are posit…
We reported a novel poly(ether amine) (PEAC) containing poly(ethylene oxide) (PEO) short blocks and coumarin units, which was synthesized by nucleophilic addition/ring-opening polymerization of diepoxy and diamine monomers. PEAC can be directly dispersed in aqueous solution as uniformly sized nanoparticles 50-60 nm in…
The pairing symmetry is one of the major issues in the study of iron-based superconductors. We adopt a minimal two-band tight-binding model with various channels of pairing interaction, and derive a set of two-band Bogoliubov--de Gennes (BdG) equations. The BdG equations are implemented in real space and then solved s…
The mesoscopic reversible and irreversible polarization dynamics in polycrystalline PZT thin film capacitors are studied using local spectroscopic mapping and macroscopic first-order reversal curve measurements. The transition from a regime of short range domain wall motion to the formation of mesoscopic clusters to c…
Flame retardants including magnesium hydroxide (MH) and huntite hydromagnesite (HH) were used to develop halogen free flame retardant (HFFR) compounds based on ethylene vinyl acetate (EVA) for wire and cable applications. Cone calorimeter and limiting oxygen index (LOI) results show that cross-linking affects not only…
Abstract A new strategy for the immobilization of iminium organocatalysts through the acid–base assembly of multidentate chiral primary amines and solid polyacids is presented. A suitable structurally distinctive C 2 ‐symmetric chiral primary amine (CPA) was identified in this study and the optimal CPA–POM hybrid obta…
Cup-shaped nanocarbons (CNC) generated by the electron-transfer reduction of cup-stacked carbon nanotubes have been functionalized with porphyrins (H(2)P) as light-capturing chromophores. The resulting donor-acceptor nanohybrid has been characterized by thermogravimetric analysis (TGA), Raman and IR spectroscopy, tran…
The miscibility behavior of binary mixtures of poly(vinylidene difluoride) (PVDF) and six different kinds of polyhedral oligomeric silsesquioxanes (POSS) compounds ((ethylic) 8 Si 8 O 12 (E-POSS), (phenyl) 8 Si 8 O 12 (P-POSS), (3, 3, 3-trifluoropropyl) 8 Si 8 O 12 (FP-POSS), (1H, 1H, 2H, 2H-nonafluorohexyl) 8 Si 8 O…
Interactions with the substrate that allow near perfect horizontal alignment in combination with large difference in the coefficient of thermal expansion are shown to lead to uniaxial compressive strain in as-grown single-walled carbon nanotubes on single crystal quartz. Temperature dependence of Raman G-band spectra…
A new type of bimetallic Au-Ag heterostructured material was prepared by a selective growing strategy of a Ag nanodewdrop on the petal tip of a Au flower using an electrochemical method. The whole process was strictly controlled by forming the reactive tip of the flower petal and passivating the facet along the body o…
As a first step, a qualitative analysis of the spin-orbit operator was performed to predict the kind of organic compounds, where it could be expected that the SO/FC (spin-orbit/Fermi contact) and SO/SD (spin-orbit/spin dipolar) yield unusually small contributions to the "heavy atom effect" on (13)C SCSs (substituent c…
Highly ordered Sn-incorporated SBA-15 mesoporous materials with Sn loading up to 10 mol % were prepared in one pot using P123 triblock copolymer as the template in a self-generated acidic environment with the aid of NaCl. The acidity of the synthesis solution generated by hydrolysis of Sn precursor was found suitable…
A quaternary tin(IV) antimony(III) sulfide decorated by lanthanum(III) ethylenediamine complexes, namely, [La(en)(4)SbSnS(5)](2) x 0.5 H(2)O (1; en = ethylenediamine), has been solvothermally synthesized and structurally, thermally, and optically characterized. Its structure features an isolated hexanuclear molecule o…
Abstract The fixed‐bed oxygen absorption processes of the series of Ba 1−x Sr x Co 0.8 Fe 0.2 O 3−δ oxides were studied by oxygen partial pressure swing absorption in the temperature range of 300–850°C. The results show that SrCo 0.8 Fe 0.2 O 3−δ , with the smallest A‐site ion radius, has the largest oxygen absorption…
Solution-processed nanocrystal films have attracted significant interest as potential semiconductor materials with size-tunable optical and electronic properties that can be deposited with low-cost printing and coating techniques. Significant progress has been reported with groups II-VI and IV-VI nanocrystal films bec…
New silicon-containing soybean-oil-based copolymers were prepared from soybean oil, styrene, divinylbenzene, and p-trimethylsilylstyrene by cationic polymerization using boron trifluoride etherate as initiator. Soxhlet extraction and NMR spectroscopy indicate that the copolymers consist of a cross-linked network plast…
We show that classical many-particle systems interacting with certain soft pair interactions in two dimensions exhibit novel low-temperature behaviors. Ground states span from disordered to crystalline. At some densities, a large fraction of normal-mode frequencies vanish. Lattice ground-state configurations have more…
We propose a trilayer $\ensuremath{\pi}$-junction that takes advantage of the unconventional ${s}_{{x}^{2}{y}^{2}}=\text{cos}\text{ }{k}_{x}\text{ }\text{cos}\text{ }{k}_{y}$ pairing symmetry which changes sign between electron and hole Fermi pockets in the iron pnictides. In addition, we also present theoretical resu…