Materials Literature
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Most of the binders used in paints, varnishes, lacquer films, and photolithographic coatings are made up of macromolecules. The final dry coating consists predominately of a polymer, either cross-linked or un-cross-linked. The material may have been polymeric before application or cured to become a polymer after applica…
Abstract The application of surface‐attached, thiol‐ene polymer films for controlling material properties in a gradient fashion across a surface was investigated. Thiol‐ene films were attached to the surface by first depositing a thiol‐terminated self‐assembled monolayer and performing a thiol‐ene photopolymerization…
Nanocomposites of montmorillonite (MMT) with poly(1‐naphthylamine) (PNA) is investigated for the first time by emulsion polymerization using three different oxidants. Polymerization of PNA was confirmed by Fourier transformation infrared (FT‐IR) as well as UV‐visible spectra. The in situ intercalative polymerization o…
Abstract Polystyrene (PS) bilayers were prepared and were adhered at a temperature between the surface and bulk glass‐transition temperatures for a given time. Then, the interfacial adhesion strength ( G L ) was examined with a conventional lap‐shear measurement. G L first increased with increasing adhesion time and t…
Following the recent low temperature synthesis of high quality and single crystal CdSe quantum nanowires, we have used a thermodynamic model to investigate the plausibility of axial-growth and oriented-attachment formation mechanisms. Using surface energies for clean and alkylamine-passivated CdSe surfaces reported el…
An unsymmetrical star-shaped pi-system (1) with an isotruxene core and three fluorene arms has been synthesized, and its photophysical, electrochemical, and thermochemical properties have been investigated and compared with the corresponding symmetrical truxene derivatives 2a-d (Kanibolotsky, A. L.; Berridge, R.; Skab…
Star-shaped porphyrin-cored poly(epsilon-caprolactone) (SPPCL) was synthesized using a tetrahydroxyethyl-terminated porphyrin as a core initiator and stannous octoate as a catalyst in bulk at 120 degrees C. The molecular weight of as-synthesized polymer could be adjusted linearly by controlling the molar ratio of epsi…
Two new rare-earth dicyanamides, namely, Tb[N(CN) 2 ] 3 ·2H 2 O and Eu[N(CN) 2 ] 3 ·2H 2 O, have been prepared by ion exchange in aqueous solution, followed by evaporation of the solvent at room temperature. The structures of both compounds have been solved and refined from single-crystal and powder X-ray diffraction…
A nonlithographic breath-figure method is used to obtain ordered arrays of pores in polymer films. The pore size depends on the viscosity of the polymer solution, and is readily controlled by varying the composition of the polymer. Microbeads are patterned on the films using the pores as a template (see figure); the s…
Poly(vinyl chloride)/calcium carbonate (PVC/CaCO3) composites with micrometer or nanometer CaCO3 as fillers were prepared by the solution blending method. The thermogravimetric analysis (TGA) of the composite films conducted in N2 atmosphere showed that the addition of the CaCO3 fillers could improve their thermal sta…
Layer-by-layer assembled polyelectrolyte microcapsules are of great interest because they can possibly be used as microcontainers and they show interesting stimuli-responsive properties, which have been recently investigated. Here, we exploit capsules which are made temperature-sensitive by encapsulating poly(N-isopro…
Ordered mesoporous carbon/silica nanocomposites were synthesized through a novel multi-component molecular assembly and show promising potential as corrosion-resisted electrocatalyst supports.
Abstract A method was developed to assess the heat insulation performance of intumescent coatings. The method consists of temperature measurements using the bench‐scaled experimental set‐up of a cone calorimeter and finite difference simulation to calculate the effective thermal conductivity dependent on time/temperat…
We use molecular dynamics simulations to investigate translational and rotational diffusion in a rigid three-site model of the fragile glass former ortho-terphenyl, at 260 K< or =T< or =346 K and ambient pressure. An Einstein formulation of rotational motion is presented, which supplements the commonly used Debye mode…
Titanium dioxide thin films were grown onto stainless steel by thermal atmospheric pressure chemical vapor deposition using two different titania precursors, titanium tetraisopropoxide and titanium tetrachloride. It is demonstrated that the use of titanium isopropoxide in a nitrogen carrier gas over the temperature ra…
Abstract The structural parameters of ZnO in three phases, namely wurtzite, zincblende and rocksalt as well as transition pressures from wurtzite and zincblende to rocksalt structures are presented. Besides, the elastic constants in the three considered phases are reported. The calculations are performed using an ab‐i…
The crystal structure and the thermal properties of La 1- x Sr x CoO 3- δ (0 ≤ x ≤ 0.5) perovskites have been investigated by high-temperature X-ray diffraction. At ambient temperature, the crystal structure changes from a rhombohedral structure with the space group R 3̄ c to a cubic structure with space group Pm 3̄ m…
Poring over materials: Over the past decade, surfactant-directed self-assembly (see scheme) has led to numerous inorganic and hybrid mesoporous materials. Recently, this process was extended to organic materials: mesoporous polymers were prepared from oligomers by using Pluronic surfactants. This approach allows the d…
A micelle-based method to synthesize dispersed polyaniline (PANI)-Au composite particles by direct oxidation of aniline using AuCl4- as the oxidant is presented. The obtained composite particles have a core-shell structure, where Au nanoparticles of 20 nm mean diameter are encapsulated by PANI of well-defined tetrahed…
Silk fiber produced by the larvae of Trichoptera (caddisflies) and Lepidoptera (moths and butterflies) is composed of two filaments embedded in a layer of glue proteins. In an aerial environment Lepidoptera spin silk filaments assembled from heavy chain fibroin (H-fibroin), light chain fibroin (L-fibroin), and the gly…