Materials Literature
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The tensile stress–strain behavior and fracture properties of some new soybean oil based polymeric materials were investigated at room temperature. These materials were prepared by the cationic copolymerization of regular soybean oil, low saturation soybean oil (LoSatSoy oil), or conjugated LoSatSoy oil with styrene a…
This book reviews the major technical issues of the subject from an applications and systems perspective. It describes where today's aftertreatment are currently under research, and how aftertreatment can most effectively be integrated into a vehicle's powertrain. The text is organised according to eight specific prob…
Nanocomposite films consisting of metal nanoparticles embedded in a dielectric matrix were fabricated by simultaneous sputtering of a gold target and plasma-enhanced chemical vapor deposition of hydrogenated SiO2. The optical constants of the films were determined from spectroscopic ellipsometry measurements and were…
Previous studies have put into evidence the key role of a charge transfer excited state, noted X, in the primary steps of laser photolysis of sodium decatungstate solutions. In this work, we report a thorough study of the reactivity of the X transient towards different organic and inorganic substrates in acetonitrile…
Order-disorder, martensitic and magnetic transformations in the Ni2AlMn alloys have been investigated by differential scanning calorimetry (DSC), X-ray diffraction (XRD) and transmission electron microscopy (TEM) techniques. The critical temperatures corresponding to the above transformations have been determined. It…
(LSGM) perovskite compositions doped with Co or Fe were prepared by a combustion synthesis technique. Small doping levels of Co or Fe (≤ 10 mol % on the B‐site) resulted in increased electrical conductivity at low temperatures (due to the introduction of electronic charge carriers into the lattice), but at high temper…
Hyperbranched polymers consisting of aromatic or aliphatic polyether cores and epoxide chain-end peripheries were prepared by proton transfer polymerization. AB2 diepoxyphenol monomer 1 proved to be well suited for the preparation of hyperbranched aromatic polymer 2 by this proton transfer polymerization. The use of c…
Measurements of the thermal expansion coefficients (TECs) of chitin crystals in the lateral direction are reported. We investigated highly crystalline α chitin from the Paralithodes tendon and an anhydrous form of β chitin from a Lamellibrachia tube from room temperature to 250 °C, using X-ray diffraction at selected…
Experimental investigations in the system albite-water have been carried out to evaluate the accuracy of a new procedure to determine major-element solubilities in fluid phases and water solubilities in melts. The system albite-water had been examined previously and some consensus has been achieved with respect to pha…
Epoxidized soybean oil (ESO) has been used to toughen epoxy resin cured with ambient temperature hardener, Tris-2,4,6-(N,N-dimethyl amino methyl) phenol. The ESO was prepolymerized with the amine hardener to obtain the liquid epoxidized soybean rubber (ESR). The ESR modified epoxy networks were evaluated for their the…
Thermally stable mesoporous silica molecular sieves with wormhole framework structures, previously obtainable only from silicon alkoxides, have been prepared from low cost soluble silicate precursors in the presence of non-ionic surfactants as structure directors.
Anomalously high coercive field magnets with large remanence magnetizations have been prepared from electron-transfer salts of tetracyanoethylene and MnII(porphyrin). These magnets exhibit metamagnetic-like behavior at low temperature but, anomalously, show hysteresis with a large remanent magnetization. Metamagnets t…
The sintering characteristics and the reaction of additives with BaTiO 3 (BT) were examined for two materials having Nb‐rich composition (Comp.N) and Co‐rich composition (Comp.C) to elucidate the relation between the stability of the core–shell microstructure and the Nb/Co ratio in the BT–Nb 2 O 5 –Co 3 O 4 system. TE…
Nitinol is a very attractive material for manufacturing minimally-invasive therapy devices and tools because of its unique superelasticity and shape-memory properties. While several studies have shown it to possess good biocompatibility, its high nickel content and possible dissolution during corrosion still remain a…
Heterometallic compounds comprising copper(II) and rare-earth cations with carboxylate groups of the 2,2′-oxydiacetato as the connecting ligands, have been investigated. Five isostructural polymers [{Cu3Ln2(oda)6(H2O)6}·12H2O]n (Ln = Y (1), Gd (2), Eu (3), Nd (4) and Pr (5)) have been obtained and their structures det…
A series of lactic/glycolic acid polymers with various molar ratios of lactic to glycolic acid and various molecular weights were synthesized using the ring-opening polymerization method. The polymerization conditions for the lactic/glycolic acid polymer synthesis were as follows: 150 degrees C, 700 microm Hg, 3 h, 0.…
Nonisothermal melt and cold crystallization kinetics of poly(aryl ether ketone ether ketone ketone) (PEKEKK) were investigated by differential scanning calorimetry (DSC). The Avrami equation modified by Jeziorny could only describe the primary stage of nonisothermal crystallization kinetics of PEKEKK. Also, the Ozawa…
A 54-ferrocene dendrimer is synthesized by a convergent route and can be used to modify a Pt electrode in CH2Cl2; it can be reversibly oxidized in DMF in a single 54-electron wave (and with NO+).
The use of polypeptide models has proved to be a valuable tool to obtain accurate information on the collagen triple helix. Here we report the high resolution crystal structure of a collagen-like polypeptide with repeating sequence Pro-Hyp-Gly. The structure has been refined to an R(factor) of 0.137 and an R(free) of…
In high‐temperature solid oxide fuel cells where natural gas is used as a fuel, high‐carbon‐activity environments can be encountered in the anode compartment. Under these conditions, nickel could corrode by a process known as metal dusting. In the present study, metal dusting corrosion of pure nickel is simulated in h…