Materials Literature
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Abstract The effects of branch content (BC) and comonomer type on the mechanical properties of metallocene linear low‐density polyethylene (m‐LLDPEs) were studied by means of a stress–strain experiment at room temperature. A total of 16 samples with different BCs and comonomer types were used. In addition, the effect…
Abstract Polypyrrole‐coated polystyrene latex particles (400–1000 nm‐sized) bearing reactive amino, carboxylic acid and N ‐succinimidyl ester groups (PS‐PPyNH 2 , PS‐PPyCOOH and PS‐PPyNSE, respectively) were prepared by the in situ copolymerization of pyrrole (Py) and the N‐functionalized pyrrole in the presence of PS…
A modified Hopkinson technique is developed to simultaneously load a sample in both the axial and radial directions. This is accomplished by using a composite incident-bar and a composite transmission-bar system. The incident-bar system consists of a large-diameter bar, followed by a small-diameter bar that fits insid…
Abstract Many organic materials are damaged and decompose by irradiation of X‐rays during XPS measurements. Factors for the decomposition and/or degradation are considered to be X‐ray, radiant heat and electrons from the X‐ray source, photoelectrons and the inelastically scattered electrons from the sample itself, and…
Abstract We have investigated the electrochemical formation of oxide layers on silver in 1 M NaOH (pH 13.8) using a combination of electrochemical techniques, X‐ray photoelectron spectroscopy (XPS) and surface sensitive grazing incidence X‐ray absorption spectroscopy (XAS). While the XPS experiments were performed aft…
Abstract Silicon carbide (SiC) is a wideband semiconductor that is very promising for many applications in optoelectronics and microelectronics. Since information on the electron transport processes in SiC is scarce, its systematic study is highly desirable. The aim of this work is to determine experimentally by elast…
Abstract Novel poly(aryl ether ketone) copolymers with pendant 3‐(trifluoromethyl)phenyl groups were synthesized by the reaction of a crystal‐disrupting monomer, 3‐(trifluoromethyl)phenylhydroquinone (FH) and a mesogenic monomer, 4,4′‐biphenol (BP) with 1,4‐bis( p ‐fluorobenzoyl)benzene (BF). Thermotropic liquid cryst…
Abstract A series of high cis‐1,4 polybutadiene compounds with various levels of N330 carbon black were prepared and tested using a Rubber Process Analyzer RPA® (Alpha Technologies), suitably modified for so‐called Fourier transform rheometry. Strain sweep test protocols were used in order to capture strain and torque…
Highly ordered hexagonal arrays of isoporous films prepared from poly(9,9'-dihexylfluorene) and polystyrene-grafted silica nanoparticles (Si-graft-PS) are presented. These close-packed arrays were formed in areas of many square millimeters. The pore size varied from 3.6 to 8.5 microm, depending on the concentration of…
Abstract The use of X‐ray photoelectron spectroscopy (XPS) is expanding rapidly with the advent of more convenient, high‐resolution laboratory‐based instruments. The increase in the numbers and distribution of synchrotrons has also fuelled this burgeoning interest. Powell (C. J. Powell, J. Vac. Sci. Technol. A 21 (S42…
We performed transport measurements and voltage noise analysis on ${\mathrm{Sr}}_{2}\mathrm{Fe}\mathrm{Mo}{\mathrm{O}}_{6}$ thin films, in zero applied magnetic field as a function of temperature $T$, down to $10\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. The samples, grown by pulsed laser deposition on $\mathrm{Sr}\mathr…
Measurements are presented of acoustic emissions from cavitation collapses on the surface of a synthetic kidney stone in response to shock waves (SWs) from an electrohydraulic lithotripter. A fiber optic probe hydrophone was used for pressure measurements, and passive cavitation detection was used to identify acoustic…
Hydrophilic and hydrophobic aerosil particles immersed in S-(+)-[4-(2-methylbutyl) phenyl 4-n-octylbiphenyl-4-carboxylate] or [p-(n-decyloxy) benzylidene-p-amino-(2-methylbutyl) cinnamate] compound have been studied by employing x-ray diffraction. The aerosil-induced relative layer compression Delta d has been measure…
Abstract The effects of the blend composition and compatibilization on the morphology of linear low‐density polyethylene (LLDPE)/ethylene vinyl acetate (EVA) blends were studied. The blends showed dispersed/matrix and cocontinuous phase morphologies that depended on the composition. The blends had a cocontinuous morph…
Abstract The nature of the interface between thin organosilane bis‐1,2‐(triethoxysilyl)ethane (BTSE) films and alkaline‐cleaned aluminium surfaces has been investigated using XPS. The literature states that an oxane bond (MOSi) is formed by the reaction occurring between OH groups of both the silane and the metal surf…
Abstract We examine the graphite plasmon loss structure in reflection electron energy loss spectroscopy (REELS) and XPS with respect to the issue of measuring the energy, E p , of the π + σ plasmon peak. The two spectra differ in shape because they are based on different physical processes. In fact, a static core hole…
This paper presents and compares two different uniaxial constitutive models for superelastic shape-memory alloys (SMAs), suitable to study the dependence of the stress-strain relationship on the loading-unloading rate. The first model is based on the inclusion of a direct viscous term in the evolutionary equation for…
Abstract Novel multiblock poly(ester amide)s containing poly( L ‐lactide) and cycloaliphatic amide segments were synthesized from telechelic oligomer of α,ω‐hydroxyl terminated poly( L ‐lactide), 1,3‐cyclohexylbis(methylamine), and sebacoylchloride by the “two‐step” interfacial polycondensation method. The blocky natu…
This study investigates the structures of layers of amphiphilic diblock copolymers of poly(t-butyl styrene)-poly(styrene sulfonate) (PtBS-PSS) adsorbed on both the bare mica surface (hydrophilic) and an octadecyltriethoxysilane (OTE)-modified mica surface (hydrophobic). When the surface is rendered hydrophobic, the no…
Abstract Angle‐resolved X‐ray photoelectron spectroscopy (ARXPS) is widely accepted as a useful tool for nondestructive in‐depth analysis of near surface regions. In the present paper, it is shown for a variety of applications which kind of qualitative and quantitative information can be derived from ARXPS measurement…