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。
Blends covering the entire range of compositions of a metallocenic ethylene/1-octene copolymer and two conventional isotactic poly(propylene)s (iPPs) of different molecular weight have been prepared, analyzing (by differential scanning calorimetry and X-ray diffraction) the effect of composition and molecular weight o…
We study some asymptotic behaviour of phase interfaces with variable chemical potential under the uniform energy bound. The problem is motivated by the Cahn-Hilliard equation, where one has a control of the total energy and chemical potential. We show that the limit interface is an integral varifold with generalized L…
The luminescence from single laser produced cavitation bubbles for varying degrees of asphericity is investigated temporally, spatially, and spectrally. The degree of asphericity is controlled with an adjustable rigid boundary near the bubble. Temporally, single and multiple light emission events happen during a time…
Abstract The effect of aramid, glass and cellulose short fibers on the processing behavior, crosslinking density and mechanical properties of natural rubber (NR), ethylene‐propylene‐diene terpolymer rubber (EPDM) and styrene‐butadiene rubber (SBR) has been investigated. Two fiber percentages (10 and 20 phr) were added…
Abstract Structural and electronic properties of the as‐grown (011) crystal face and the mechanically polished (001) surface of potassium titanyl phosphate (KTiOPO 4 or KTP) have been investigated by core‐level x‐ray photoelectron spectroscopy and reflection high‐energy electron diffraction (RHEED). With XPS analysis…
The Middle to Upper Miocene volcano-sedimentary units in the Mihalýccýk–Eskisehir area of Turkey consist mainly of altered tuff and claystone, with thin layers of dolomite and silica nodules and horizons. Ripple marks and desiccation cracks are common in the siliceous tuff and dolomite units. Green to yellowish green…
ABSTRACT: Linear low‐density polyethylene (LLDPE), oriented polypropylene (OPP), polycarbonate (PC), polyethylene terephthalate (PET film and PET bottle), and polyethylene naphthalate (PEN) were stored in a model solution containing 10 flavor compounds at 4, 20, and 40 °C and flavor absorption by the plastic materials…
ABSTRACT: Internal atmosphere modification in fruits and vegetables by surface film coatings depends on film permeability, coating thickness, and fruit surface coverage. Research in this area has been mostly empirical, with unpredictable results and diverse conclusions. To reduce variability, it is necessary to have a…
Hydrogen gas (H 2 ) was used to extract B 2 O 3 coatings from boron carbide (B 4 C) particles, permitting a lower temperature onset of sintering and restricting coarsening via solution and precipitation of B 4 C in B 2 O 3 liquid. Remnant H 2 had to be removed from the furnace before specimens were heated through temp…
A mechanistic model for the kinetics of hydrolysis of α‐tricalcium phosphate (α–Ca 3 (PO 4 ) 2 or α‐TCP) to hydroxyapatite (Ca 10− x (HPO 4 ) x (PO 4 ) 6− x (OH) 2− x or HAp) has been developed. The model is based on experimental hydrolysis rate data obtained using isothermal calorimetry. Analysis of the kinetic data…
Abstract Lanthanum phosphate (LaPO 4 ) powders were synthesized by precipitation with and without excess of phosphate and sintered at 1450° C. Bulk and surfaces of different origin and treatments were investigated using powder x‐ray diffraction, transmission electron microscopy and x‐ray photoelectron spectroscopy. Th…
The s p 3 tight-binding model is used to calculate electronic structures of narrow-gap carbon nanotubes. The curvature effects cause a small energy gap, a one-dimensional parabolic bands, and a shift in the Fermi wave vector. The energy gap is described by the approximate relation E g ≃5| V p p π | b 2 cos (3θ)/16 R d…
A fully integrated on-chip vacuum microtriode using carbon nanotubes as field emitters was constructed laterally on a silicon surface using microelectromechanical systems (MEMS) design and fabrication principles. Each electrode in the triode was made of a hinged polycrystalline silicon panel that could be rotated and…
Abstract Benzylation of sawdust from China fir was carried out to prepare plastics based on natural resources. It was found that thermoplasticity and mechanical properties of the chemically modified wood flour changed with the substitution reaction conditions. By compounding sisal fibers and the plasticized fir sawdus…
We have investigated the Jahn-Teller transition in ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{MnO}}_{3}$ by high-temperature powder neutron diffraction in the low-doping region $(0<x<~0.1).$ The Jahn-Teller transition temperature which is about ${T}_{\mathrm{JT}}\ensuremath{\approx}750\mathrm{K}$…
Abstract Crystalline manganite (γ‐MnOOH) has been synthesized and characterized using x‐ray diffraction and high‐resolution transmission electron microscopy techniques. The surface composition was studied with XPS between pH 0.4 and 11. Special pre‐cooling procedures were developed to keep the manganite/water interfac…
Abstract Phenolic resin/clay nanocomposites were prepared using a suspension condensation polymerization method that was suitable to both novolac and resole. Natural montmorillonite and two kinds of organic modified montmorillonite were adopted to investigate the effect of modification on the final morphology of the n…
In the present work the kinetics of the isothermal quiescent crystallization of the isotactic Poly(1-butene) (i-PB) is analyzed by means of rheological measurements and is used as an internal reference to study the effects of the shear flow. In particular, the flow-induced crystallization of two i-PB samples with diff…
Crystals of synthetic melanothallite, Cu2OCl2, have been prepared by chemical transport reactions. Its crystal structure (orthorhombic, Fddd, a 7.4691(15), b 9.5969(19), c 9.700(2) Å, V 695.3(2) Å3, Z = 8) has been refined to R1 = 0.028 (wR = 0.078; S = 1.180) on the basis of 346 unique observed reflections (|Fo | ≥ 4…
This paper illustrates a new model that enables the estimation of life of polymeric insulation subjected to DC stress, both in the presence and in the absence of voltage polarity inversions. The derivation of the model parameters is based on the results of space charge measurements and accelerated life tests realized…