Materials Literature
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The development of a novel procedure based on microwave (MW) heating allowed to obtain a soluble derivative of Single Wall Carbon Nanotubes (SWNTs) by grafting poly(ethylene glycol) (PEG) chains to shortened SWNTs. The use of MW irradiation remarkably enhanced reaction rates compared to similar syntheses based on conv…
Abstract The correlation between the molecular architecture, morphology, and micromechanical deformation behaviour of styrene/butadiene (SB) block copolymers with different architectures (linear and star block copolymers, total styrene content, Φ ST = 0.74) was studied using dynamic mechanical analysis (DMA), uniaxial…
Abstract Micro‐Raman spectroscopy has been used to investigate the chemical micro‐heterogeneity of multiphase‐separated poly(ether urethanes) (PETU). Analysis of PETU cross‐sections by means of micro‐Raman spectroscopy revealed the nearly complete absence of soft segments in AI aggregates (called globules). These aggr…
The main aim of this work was to use highly concentrated W/O (water-in-oil) emulsions, prepared by the PIT (phase inversion temperature) method as templates for solid polystyrene foams with a narrow pore size distribution. The highly concentrated emulsions were prepared by a method based on the PIT principle, which co…
The effect of concentration on anisotropic phase behavior of acid-hydrolyzed cellulose suspensions has been examined using conventional polarizing microscopy and the novel technique of environmental scanning electron microscopy (ESEM). Microcrystalline cellulose dispersed in water formed biphasic suspensions in a narr…
Thermal compact models enable the prediction of junction temperatures of complicated components in a system level numerical simulation with a minimum of computational effort. A method for generating compact models has been proposed by the DELPHI consortium. Here a new approach is proposed that is no longer based on a…
Cotton and cotton/polyester blended weft knitted fabrics are prone to shrinkage during finishing processes and customer usage. The effect of various fabric characteristics on the shrinkage behavior of weft knits is as important as that of the fiber characteristics. In this work, three different single jersey knits wit…
Abstract This paper presents the current understanding of the flame retardant mechanism of Casico™. The study includes the flame retardant effect of each individual component: ethylene–acrylate copolymer, chalk and silicone elastomer, as well as the formation of an intumescent structure during heating. The flame retar…
Abstract This study was conducted to characterize the mechanical properties of extrusion‐foamed neat rigid PVC and rigid PVC/wood‐flour composites by using endothermic and exothermic chemical foaming agents (CFAs). The specific elongation at break (ductility) of the samples was improved by foaming, while the opposite…
The influence exerted by doping with Cu and Ag acceptor impurities at a content of 1, 3, and 5 at. % on the luminescence and photoconductivity of zinc oxide films has been studied. Electron-beam evaporation in optimal modes has been used to obtain films with predominant luminescence in the UV spectral range. It has be…
Carbon nanofibers were produced from polyacrylonitrile/N, N-Dimethyl Formamide (PAN/DMF) precursor solution using electrospinning and vacuum pyrolysis at temperatures from 773-1273 K for 0.5, 2, and 5 h, respectively. Their conductance was determined from I-V curves. The length and cross-section area of the nanofibers…
Pinned particles in space are introduced in our molecular-dynamics simulations. Effects of pinned particles on the structural relaxation in binary soft-sphere supercooled liquids are examined. It is found that the relaxation dynamics becomes slower as the number of the pinned particles increase and this tendency is en…
Abstract The phase separation and morphology in poly(urethane urea)s were investigated as soft segment length and chain extender structure were varied. Increases in soft segment length led to increased phase separation that resulted in greater mobility of the soft segment. This was shown by lower soft segment glass tr…
Abstract It is shown that the defect chemistry of acceptor-doped SrTiO3 is understood in great detail, and that this permits the accurate description, not only of the equilibrium electronic and ionic conductivities, but also of non-equilibrium situations generated by electrical or chemical driving forces, and even of…
A critical review of the literature has been undertaken to establish the current state of knowledge and understanding of the corrosion and stress corrosion cracking (SCC) of 13 wt-%Cr martensitic stainless steels for applications in the oil and gas industry. Corrosion data for 13%Cr martensitic stainless steels are cr…
Abstract Formation of agglomerate structure by the rubber particles through flocculation or networking mechanism during dynamic crosslinking of thermoplastic elastomers based on EPDM rubber and polypropylene has been evidenced. Scanning electron microscopy (SEM) examination performed on the crosslinked blend samples w…
Abstract Polymeric optical fibre (POF) is used for simple light guide and illumination applications. The polymer optical fibre materials can be utilised in flexible lighting elements which can be combined with textile structures. The POF woven fabrics are introduced as a flexible alternative to lighting elements. Vari…
While evidence is presented of the ingress of hydrogen to steels from near-neutral-pH solutions at potentials in the vicinity of open-circuit values, there is also evidence of dissolution occurring simultaneously. Such synergism presents problems in formulating a mechanism-based quantitative expression for crack growt…
In-situ structural changes at the lamellar level during uniaxial deformation and subsequent relaxation of a semicrystalline ethylene−propylene (EP) copolymer containing 78 wt % ethylene were studied by time-resolved synchrotron small-angle X-ray scattering (SAXS) at room temperature (25 °C). During the initial stage o…
The aim of the present study is to propose a predictive model for the shear modulus versus pressure and temperature G(P,T) to complete the principal known elasto-plastic models implemented in hydrodynamic computer codes. The relevance of the proposed G(P,T) model is discussed in detail. The generic approach is to mode…