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。
With excitation by the light of the wavelengths longer than 320 nm, fluorescence spectra of polyethylene terephthalate (PET) films had somewhat different shapes from those excited below 300 nm through the intrinsic absorption of PET molecules. Also, in the measurements taken with a polarizer in front of the receiving…
A new cross-linking algorithm, NETSIM, is described which enables the study of continuously spatially distributed (off-lattice) polymer networks and reveals some topological features possibly associated with the enhanced mechanical properties seen in certain bimodal elastomer networks. These features are identified ba…
We report new data on the electrooptic behaviour of the semiconductor ferroelectric crystal Sn2P2S6 in the temparature region 295-390 K. At the room temperature the magnitude of the effective longitudinal electro-optic coefficient is about 50 pm/V, much larger than the value reported previously. Corresponding half-wav…
Determination of a set of processing parameters for a given material type is a complex process, and much work has been done using the framework developed in the last century by Darcy. While this model, assuming Newtonian flow through a granular (essentially a smoothed, porous) medium, has produced useful flow front pr…
The liquid crystalline material octylcyanobiphenyl was studied in the form of bridges spanning the space between two solid supports in an immiscible water bath. In the nematic phase the bridge collapses above a certain length-to-diameter ratio, consistent with the behaviour of ordinary Newtonian liquid bridges. The sm…
Low-temperature high-magnetic-field far-infrared spectroscopy and electron-spin-resonance measurements have been performed on single crystals of the cubic perovskite ${\mathrm{KNiF}}_{3}.$ We found the absorption at $48.7\ifmmode\pm\else\textpm\fi{}0.3 {\mathrm{cm}}^{\ensuremath{-}1}$ observed by Richards [P. L. Richa…
This paper studied the structure and properties of highly filled polyethylene/magnesium hydroxide composite. A third additive component was introduced to alter interfacial adhesion. Scanning electronic microscopy proved that the filler particles were totally surrounded by additive material. Interfacial adhesion played…
Abstract X-ray diffraction (XRD), infra red (IR) spectroscopy, gloss goniophotometry and stylus profilometry were used to investigate the alignment of kaolinite applied as a thin coating on a polyester film substrate. The principles and applicability of the analytical methods are reviewed and discussed in the context…
Abstract 1 H NMR relaxation data provide insight into the effects of carbon black fillers on the structure of polymer networks in products based on natural rubber so that accepted ideas concerning the interaction between elastomeric networks and active filling materials are confirmed. A new 1 H NMR relaxation experime…
Abstract Natural rubber was deproteinized with a proteolytic enzyme and surfactant to reduce nitrogen content less than 0.02%. The deproteinized rubber was further purified by acetone-extraction followed by transesterification with sodium methoxide. The density of rubber decreased and the thermal expansion coefficient…
Through combining an experimental investigation on the isothermal nanocrystallization thermodynamics of bulk amorphous selenium and a theoretical analysis, an easy and reliable way to derive the lower grain-size limit of polycrystalline materials was proposed. The grain-size limit for the polycrystalline selenium was…
Adsorption behavior of two grades of poly(ethylene glycol) (PEG) was measured on silica and alumina in the presence of other organic and inorganic additives commonly used in ceramic processing. A fractional factorial designed experiment showed that the level of adsorption was significantly influenced by the powder or…
<div class="htmlview paragraph">The paper represents a brief summary of a survey of the chemical and metallurgical composition of cast iron brake discs, as used in automotive applications by a wide range of different manufacturers across Europe. From the findings, sample discs were produced, to a standard design…
<div class="section abstract"><div class="htmlview paragraph">Automotive styling trends point to reduced bumper overhang, greater sweeps, and reduced overall package space for the bumper system. At the same time engineers are charged with improving bumper performance to reduce collision repair costs and en…
<div class="htmlview paragraph">To reduce emissions from diesel engines, the effects of oxidation catalysts on the emissions reductions were studied. The effectiveness of several oxidation catalysts on both the regulated and unregulated emissions was evaluated. The oxidation activity of the catalysts was varied…
Abstract In situ silica reinforcement for the acrylonitrile-butadiene rubber (NBR) vulcanizates, which were premixed with a conventional silica (VN-3) and γ-mercaptopropyltrimethoxysilane (γ-MPS), was achieved by the sol-gel reaction of tetraethoxysilane (TEOS) using ethylenediamine. It was observed that the reinforce…
Abstract Gelator 1 which has two aliphatic chains, three amide groups, and one glucosamine unit showed an excellent gelation ability for many organic solvents. The in situ cross-link of these organic gels by toluene-2,4-diisocyanate resulted in new robust gels with high Tgel values, retaining their gel fiber super-str…
The crystallization behavior of nominal-composition GeSb 2 Te 4 films prepared by rf-magnetron sputtering are examined. The crystal structures of the as-sputtered and the annealed films at different annealing temperatures are identified by the X-ray diffraction (XRD) method. Two phase transformations occur in the conv…
A new Monte Carlo (MC) method is used to interpret experimental stress−optical coefficients ( C ) of polyethylene (PE) networks in uniaxial deformation. The method considers the deformation of individual PE-network chains, whose conformational properties and −CH 2 − segment orientations are calculated using a rotation…
The aim of this study was to make clear the age-hardening mechanism in a dental high carat gold alloy. For this purpose, age-hardening behaviour of a commercial dental high carat gold alloy, 65.5 wt% Au-14.0 wt% Ag-10.0 wt% Cu-8.9 wt% Pt, was investigated by means of hardness testing, X-ray diffraction study and scann…