Materials Literature
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Abstract Biodegradable polycaprolactone (PCL) was melt‐compounded in a Werner & Pfleiderer twin‐screw extruder (ZSK25) together with wood flour (WF) and lignin with maleic anhydride‐grafted polycaprolactone (PCL‐ g ‐MA) used as a compatibilizer. The grafting of maleic anhydride onto PCL was achieved with reactive…
Two types of three-arm or four-arm star-shaped hydroxy-terminated poly(ε-caprolactone) (PCL) were successfully synthesized via the ring-opening polymerization of ε-caprolactone (CL) with multifunctional initiator, such as trimethylolpropane (TMP) or pentaerythritol (PTOL), and stannous octoate (SnOct 2 ) catalyst in b…
Abstract The synthesis and properties of a class of soluble fluorine‐containing aromatic polyimides are described. Substituents of trifluoromethyl groups on the aromatic rings of paralinked aromatic ether diamine conferred the polymer prepared thereof with enhanced solubility, low‐moisture absorption, and low dielectr…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSyntheses of Conjugated Polymers Derived from N-Alkyl-2,7-carbazolesJean-François Morin and Mario LeclercView Author Information Canada Research Chair in Polymer Chemistry, Department of Chemistry, Centre de Recherche en Sciences et…
The cubic complex Ginzburg-Landau equation is one of the most-studied nonlinear equations in the physics community. It describes a vast variety of phenomena from nonlinear waves to second-order phase transitions, from superconductivity, superfluidity and Bose-Einstein condensation to liquid crystals and strings in fie…
Resonant Raman scattering (RRS) measurements made with a tunable laser provide a highly reliable technique to study the shape of the joint density of electronic states (JDOS) of isolated single-wall carbon nanotubes (SWNTs). RRS can be used to determine the energy value for the one-dimensional (1D) van Hove singularit…
Ag(111) films were deposited at room temperature onto H-passivated Si(111)-(1x1) substrates, and subsequently annealed at 300 C. An abrupt non-reactive Ag/Si interface is formed, and very uniform non-strained Ag(111) films of 6-12 monolayers have been grown. Angle resolved photoemission spectroscopy has been used to s…
Understanding the power spectrum of the magnetization noise is a long standing problem. While earlier work considered superposition of 'elementary' jumps, without reference to the underlying physics, recent approaches relate the properties of the noise with the critical dynamics of domain walls. In particular, a new d…
We investigate the periodic Anderson model in the presence of an external magnetic field, using dynamical mean-field theory in combination with the modified perturbation theory. A metamagnetic transition is observed which exhibits a massive change in the electronic properties. These are discussed in terms of the quasi…
An improved micro-SQUID technique is presented allowing us to measure the temperature dependence of the magnetisation switching fields of single nanoparticles well above the critical superconducting temperature of the SQUID. Our first measurements on 3 nm cobalt nanoparticle embedded in a niobium matrix are compared t…
We present a practical method to compute the vibrational resonant Raman spectra in solids with delocalized excitations. We apply this approach to the study of tetrahedrous amorphous carbon. We determine the vibrational eigenmodes and eigenvalues using density functional theory in the local density approximation and th…
Structural, magnetic, electrical and thermal transport, and heat-capacity measurements are reported on single crystals of ${\mathrm{Eu}}_{8}{\mathrm{Ga}}_{16}{\mathrm{Ge}}_{30},$ ${\mathrm{Sr}}_{8}{\mathrm{Ga}}_{16}{\mathrm{Ge}}_{30},$ and ${\mathrm{Ba}}_{8}{\mathrm{Ga}}_{16}{\mathrm{Ge}}_{30}.$ These compounds all cr…
Inelastic X-ray scattering data have been measured in liquid lithium at 475 K as a function of momentum transfer $Q(2<Q<55{\mathrm{nm}}^{\mathrm{\ensuremath{-}}1}),$ and at several constant energies transfer E in the range 15--40 meV. This data provide a direct experimental evidence that Umklapp-like processes c…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
Mesoporous activated carbon fiber (ACF) was prepared from a phenolic resin containing a small amount (0.1 wt%) of an organic nickel complex through carbonization and steam activation. Microporous ACF as reference sample was also prepared from a phenolic resin without any agent. In both cases, for the mesoporous ACFs a…
Abstract New polyethers ( P2 , P4 ) with isolated emitting distyrylbenzene derivatives and pendant aromatic 1,3,4‐oxadiazole chromophores have been prepared by the Horner–Wadsworth–Emmons olefination reaction. Polyethers P1 and P3 without oxadiazole groups have also been synthesized for comparison. The reduced viscosi…
Full factorial experimental design incorporating multilinear regression analysis of the experimental data allows quick identification of main trends and effects using a limited number of experiments. In this study, we illustrate the usefulness of these techniques in macromolecule crystallization studies, by employing…
Aluminum coated with ZrO2, SiO2, and BaTiO3 films by a sol-gel dip coating was anodized to examine the structure and dielectric properties of anodic oxide films. Anodizing leads to the formation of anodic oxide films, which consist of an outer Al- (Zr, Si, BaTiO3) composite oxide layer and an inner Al2O3 layer, at the…
Eight adducts between different pyridylporphyrins and ruthenium complexes, MPyP[RuCl(2)(DMSO)(2)(CO)], c-DPyP[RuCl(2)(DMSO)(2)(CO)](2), TrPyP[RuCl(2)(DMSO)(2)(CO)](3), TPyP[RuCl(2)(DMSO)(2)(CO)](4), (MPyP)(2)[RuCl(2)(DMSO)(2)], [c-DPyP[RuCl(2)(DMSO)(2)]](2), MPyP[RuCl(2)(CO)(3)], and [c-DPyP[RuCl(2)(CO)(2)]](2), have…
In terms of general social trends and technical trends in the electronic components industry, environmental problems and safety have caught attention and are progressing the acquisition of ISO-9000 and ISO-14000, lead-free soldering, dehalogenation, and the adoption of other environmental countermeasures. Technically,…