Materials Literature
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Significance and UseThese test methods are suitable for research and as quality control and specification tests. It is necessary to know the hydroxyl contents of polyols in order to formulate polyurethane systems.Scope1.1 These test methods measure the hy
Plastics Engineering is the official publication of the Society of Plastics Engineers (SPE). We provide plastics professionals with a wealth of information about machinery, technological advances, materials innovations, sustainability, and more.
This guide covers test procedures for performing accelerated tests to evaluate relative corrosion resistance of various coatings applied to mechanical fasteners. Corrosion mechanisms such as general and crevice corrosion may be evaluated with this method. Test duration may be selected to achieve any desired level of c…
Significance and UseThere are three types of olefinic groups present in sufficient concentrations to warrant consideration, one or more of which can normally be found in any polyethylene (4). The three types are: trans-vinylene, R - CH = CH - R′, sometime
Significance and Use Lightfastness or weatherability for specified periods of time is pertinent for certain types of printed matter such as magazine and book covers, posters and billboards, greeting cards and packages. Since the ability of printed ma
This practice covers the sampling, for the determination of chemical composition of nonferrous metals and alloys that have been reduced to their final form by mechanical working; that is, by such means as rolling, drawing, and extruding. The porti
We report a green phosphor Zn 2 SiO 4 :Mn 2+ with a surface modified by coating SiO 2 nanoparticles. The phosphor was coated with SiO 2 nano-particles using a modified sol–gel method. The pH levels of phosphor solution were changed to investigate its effect on the phosphor characteristics. The SiO 2 nano-particles are…
In the UK, ACAL Energy and its development partners have put the ground works in place to install the world's first FlowCath® fuel cell technology system to be used in a practical application, at the Warrington, Cheshire site of Solvay Interox Ltd.
The International Center for Materials Nanoarchitectonics in Japan – part of the National Institute for Materials Science (NIMS) – has developed two types of novel proton-conducting oxide electrolytes for use in solid oxide fuel cells. The research team anticipates that these new electrolytes will accelerate the comme…
Researchers at the National Renewable Energy Laboratory (NREL) have certified the first all-quantum-dot photovoltaic cell, which was based on lead sulfide and demonstrated reasonable quantum dot solar cell performance for an initial efficiency measurement along with good stability. The certified open-circuit voltage o…
A new method of evaluating crystallization activation energy of Ge 2 Sb 2 Te 5 is proposed by in situ resistance measurement under isothermal annealing conditions. Linear relationship between logarithmic time and reciprocal temperature in modified Johnson–Mehl–Avrami–Kolmogorov equation is derived under the assumption…
Significance and UseThis test method is suitable for setting specifications, for use as an internal quality control tool, and for use in development or research work on industrial aromatic hydrocarbons and related materials. It also gives an indication
In this work, the organic light-emitting diodes (OLEDs) based on Alq3 are fabricated. In order to make clear the transport mechanism of carriers in organic light-emitting devices at low temperature, detailed electroluminescence transient response and the current-voltage–luminescence (I–V–L) characteristics under diffe…
Zehong Yang1, Xiaojun Zhao1,21Nanomedicine Laboratory, West China Hospital and Institute for Nanobiomedical Technology and Membrane Biology, Sichuan University, Chengdu, People’s Republic of China; 2Center for Biomedical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USAAbstract: RADA16-I peptide h…
Abstract : Understanding tribological response of materials (adhesion, friction and wear) from atomistic and molecular perspective is essential for design of reliable devices with dimensions in the nanometer regime. In this project atomistic simulations have been carried out to discover fundamental mechanisms that con…
The project aimed to study the diffusion of specific counter anions into a conducting-polymer film by the choice of various counter-ions in the solution, cyclic voltammetry behaviour of the conducting polymers and investigation of the morphology of the polymer. It has been observed that the redox activity was strongly…
Following our previous investigation of magnetic phase transitions in Pr1-xLuxMn2Ge2 [1], the magnetic structures of Pr1-xLuxMn2Ge2 (x=0.2; 0.4) have been investigated over the temperature range (10-450 K) using the high intensity diffractometer Wombat at OPAL. Four magnetic transitions have each been detected for bot…
This report presents the results of investigations carried out for polymer- and low-weight molecular materials prepared in the form of thin films by various methods, namely the thermal vacuum evaporation and chemical vapour deposition. The influence of the technological conditions on the structure, surface morphology,…
The method for determining mass fraction of W and Ti in WC-TiC sample by X-ray fluorescence spectrometry was introduced. Based on the correlations between XRF intensity and element concentration in W and Ti of WC-TiC sample, the matrix correction method was used to eliminate the influence of absorption and strengtheni…
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