Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Diffusion of Si and O ions in simulated liquid SiO 2 under high pressure (or high density) have been studied in a model containing 3000 ions under periodic boundary conditions with pairwise interatomic potentials which have a weak electrostatic interaction and Morse-type short-range interaction. In order to observe di…
Abstract The imidization of poly(styrene‐ co ‐maleic anhydride) (SMA) was conducted, and the glass‐transition temperatures ( T g 's) of the resulting products were measured with differential scanning calorimetry. The contributions from functional groups of maleic anhydride, N ‐phenylmaleamic acid, and N ‐phenylmaleimi…
Abstract Acrylic‐based nanocomposite resins have been investigated in view of future application in water borne automotive coatings by the aid of postemulsification processes. Mechanical, flow and leveling properties of the nanocomposite resins, containing various concentrations of silicate, have been investigated. Th…
The new mineral fluorcalciobritholite, ideally Ca3Ce2(SiO4)2(PO4)F, has been found at Mount Kukisvumchorr, Khibiny alkaline complex, Kola Peninsula, Russia, in veinlets which contains aggregates of orthoclase, nepheline, sodalite and biotite in association with grains of fayalite, gadolinite-(Ce), zircon, monazite-(Ce…
Dilatometric measurements were performed to obtain the average thermal expansion coefficients of a series of Gd-based bulk metallic glasses. The fragilities of these alloys were determined based on differential scanning calorimetry measurements. It was found that there is a linear correlation between the fragility par…
Abstract Phenyl acetylene terminated poly(carborane‐silanec) (PACS) was synthesized by the couple reaction of methyldichlorosilane with 1,7‐dilithio‐ m ‐carborane and lithium phenylacetylide. The structure was characterized using FTIR, 1 H‐NMR, 13 C‐NMR, 29 Si‐NMR, and gel permeation chromatography. PACS exhibits solu…
A series of $(100\ensuremath{-}x)$ $\mathrm{Si}{\mathrm{O}}_{2}\text{\ensuremath{-}}x\mathrm{Hf}{\mathrm{O}}_{2}$ planar waveguides $(10<x<45)$ doped with $0.01\phantom{\rule{0.3em}{0ex}}\mathrm{mol}\phantom{\rule{0.2em}{0ex}}%$ ${\mathrm{Er}}^{3+}$ was prepared by a sol-gel route. The lifetime of the $^{4}I_{13…
Abstract The successful formation of organized multilayer assemblies, formed from the Dawson type mixed addenda heteropolyanion, [P 2 W 17 V IV O 62 ] 8− , and a Ru 2+ pentaerythritol based metallodendrimer, [RuDen] 8+ , has been achieved on carbon electrode surfaces. Cyclic voltammetric studies of the assembly across…
Abstract A kind of hydrophilic nano‐SiO 2 was applied to poly(ethylene terephthalate)/polyamide‐6 (PA‐6) blends. Melt‐blended composites were prepared at various component ratios and different nano‐SiO 2 levels. Mechanical, morphological, dynamic mechanical, and thermal tests were carried out to characterize the prope…
A kinetic model is developed with the goal of understanding and predicting the morphology evolution of nanocrystals in nonequilibrium growth conditions. The model is based on the assumption that under such conditions, different crystal planes have different kinetic parameters. This model focuses on the morphology-deve…
A new kind of amphiphiles containing an organometallic headgroup, an alkyl zinc alkoxide, self-assembles to form [MeZnOPEGn] gel (PEG: polyethylene glycol; n=400; see picture, left), which in turn serves as a precursor to afford nanoporous ZnO (right).
Abstract Waste tire powder was functionalized in the presence of various concentrations of allylamine and benzoyl peroxide. Fourier transform infrared spectroscopy studies confirmed the presence of allylamine on the surface of the rubber powder. The surface energy of the functionalized rubber powder revealed that the…
Abstract The changes of chemical and crystal structures of the reacetylation and degraded chitosans caused by sonication, acid hydrolysis, and H 2 O 2 oxidation were studied systematically. During the reacetylation of chitosan, acetic anhydride can result in the degradation of chitosan when its concentration exceeds a…
Beta,beta'-Fused monoruthenocenylporphyrins, Cp*Ru(III)[1,2-[M(II)-5,10,15,20-tetrakis(3,5-di-tert-butylphenyl)-porphyrinato]-3-methyl-cyclopentadienide] (M = Ni (20), Cu (21), Zn (22)), and bisferrocenoporphyrins, Fe(II) bis[1,2-[M(II)-5,10,15,20-tetraphenylporphyrinato]-3-methyl-cyclopentadienide] (M = Ni (24), Cu (…
The properties of isotactic polypropylene (iPP) melts are investigated via atomistic molecular dynamics (MD) simulations in the isothermal−isobaric ( NPT ) ensemble. A fully flexible model is developed and validated by comparing predicted volumetric and thermodynamic behavior with available experimental data. Atomic-l…
Abstract A novel superabsorbent nanocomposite based on partially neutralized acrylic acid, waste polystyrene foam, and sodium type montmorillonite (Na‐MMT) powder was synthesized through emulsion polymerization using N, N′‐methylenebisacrylamide as a crosslinker, 2,2′‐azo‐bisiso‐butyronitrile, ammonium persulfate, and…
The relation between a dynamic and a thermodynamic temperature, glass transition Tg and boiling point Tb, is investigated for various glass-forming liquids, with emphasis on monohydroxy alcohols. As is well known, Tb and Tg are positively correlated across a large variety of liquids. However, we found that the same qu…
Abstract Fibers made of cellulose (CE) and silk fibroin (SF) are wet spun from solutions in N , N ‐dimethylacetamide containing 7% LiCl (w/w). Different coagulation baths (water and ethanol) and spinning conditions are used. By using water as the coagulant, a partial dissolution of SF occurs and negligible variation o…
Abstract Poly(ethylene terephthalate) (PET) resin is one of the most widely used engineering plastic with high performance, but the poor impact strength limits its applications for the notch sensitivity. In this research, toughened PET alloy was prepared by blending recycled PET with polycarbonate (PC) and MDI (methyl…
Abstract Methyl methacrylate (MMA) was directly grafted on natural rubber (NR) or sulfur prevulcanized (SP) NR surface. The rubber sheet was primarily treated with argon plasma, followed by exposure to air for generating active functional groups. After immersing in a mixture of 30% hydrogen peroxide and MMA in ethanol…