Materials Literature
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Abstract A potentially inexpensive alternative epoxy resin system based on soybean oil has been developed for polymer composite applications. Epoxidized methyl soyate (EMS) and epoxidized allyl soyate (EAS) have been synthesized at the University of Missouri–Rolla. These materials consist of mixtures of epoxidized fat…
Specular X-ray reflectivity (XR) and quartz crystal microbalance (QCM) measurements were used to determine the absorption of water into thin poly(4-ammonium styrenesulfonic acid) films from saturated vapor at 25 degrees C. The effect of film thickness on the absorption kinetics and overall absorption was investigated…
High-resolution domain studies have been performed on $0.8\mathrm{Pb}({\mathrm{Mg}}_{1/3}{\mathrm{Nb}}_{2/3}){\mathrm{O}}_{3}\ensuremath{-}0.2{\mathrm{PbTiO}}_{3}$ (0.8PMN-0.2PT) single crystals via piezoresponse force microscopy (PFM). A complex structure consisting of micron-size domains comprising embedded nanodoma…
We studied thermochemical characteristics of the Sm1+xBa2-xCu3Oy single crystals by solution calorimetry. Dependences of formation enthalpies from samarium content were constructed. It was established that solid solutions on the bases of Sm123 could be decomposed both in inert and in oxygen atmosphere into different m…
The bending rigidity $k_c$ of bilayer vesicles self-assembled from amphiphilic diblock copolymers has been measured using single and dual-micropipet techniques. These copolymers are nearly a factor of 5 greater in hydrophobic membrane thickness $d$ than their lipid counterparts, and an order of magnitude larger in mol…
We have developed a fabrication process for nanoscale tunnel junctions which includes focused-ion-beam etching from different directions. By applying the process to a Nb/(Al-)Al_2O_3/Nb trilayer, we have fabricated a Nb single-electron transistor (SET), and characterized the SET at low temperatures, T=0.04-40 K. The s…
Functionalized anionic polystyrene latex particles with ATRP initiators were synthesized by surfactant-free shell-growth emulsion polymerization of styrene and 2-(2‘-chloropropionato)ethyl acrylate (HEA-Cl). N -Isopropylacrylamide (NIPAM) was polymerized from these particles by surface-initiated aqueous ATRP using PMD…
Electrospinning of biologically significant polymers (natural and synthetic polypeptides) has increased since electrospun membranes were identified as candidates for tissue engineering constructs. These materials have a specific secondary structure, which influences their properties. The effect of electrospinning on t…
Abstract Three types of mineral fillers—talc, calcium carbonate (CaCO 3 ), and kaolin (10–40 wt % filler loadings)—were compounded with polypropylene (PP) with a twin‐screw extruder. The composites were injection‐molded, and the effects of the filler loading on the mechanical, flow, and thermal properties for the thre…
Single-walled carbon nanotubes (SWNT) were functionalized with polystyrene (PSt) by grafting to and grafting from methods. PSt-N 3 with designed molecular weight and narrow molecular weight distribution was synthesized by atom transfer radical polymerization (ATRP) of styrene (St) followed by end group transformation…
An emulsion polymer (i.e., latex) has been used as the polymer matrix starting material in order to lower the percolation threshold of single‐walled‐carbon‐nanotube (SWNT)‐filled polymer composites (e.g., see Figure). A percolation threshold below 0.04 wt.‐% SWNT is achieved. This composite system offers the potential…
A new synthesis method to produce various organic‐dye‐doped silica nanoparticles using a reverse microemulsion has been developed. These nanoparticles show extremely high fluorescent signals (see Figure), excellent photostability, and size uniformity and tenability. These dye‐doped silica nanoparticles can be used for…
Stable colloidal suspension of magnetic nanoparticles is challenging owing to both van der Waals forces and magnetic dipolar interactions. Thus, it is essential to coat magnetic nanoparticles with a surfactant during chemical synthesis in order to prepare well-dispersed nanoparticle colloid. In the present study, coba…
Thermal runaway is a significant safety concern in chemical plants with exothermic reactors. Understanding the time scale on which thermal runaway occurs for these systems can be an important factor for their safe and efficient operation. On the basis of the knowledge of time to runaway, procedures can be implemented…
No AccessPlastics Flammability HandbookJan 2004The Burning Process and Enclosure FiresB. KarlssonB. Karlssonhttps://doi.org/10.3139/9783446436695.003SectionsAboutPDF ToolsAdd to FavoritesDownload CitationTrack CitationsCopy LTI LinkPDF key 'share (en)' returned an object instead of string.FacebookTwitterEmailLinkedIn…
Crystal structure of deuterated glycinium phosphite was studied in the paraelectric (P) phase at 348 K and in the ferroelectric (F) phase at 223 K by means of the single crystal neutron diffraction. Deuteration rate is estimated to be 0.939 by the least-squares refinement. In the P phase, quasi-one-dimensional hydroge…
Abstract A facile methodology to modify polystyrene, to incorporate alkali soluble hydroxy groups, is reported. Polystyrene of well‐defined number‐average molecular weights in the range of 3000 to 50,000 were prepared by suspension polymerization at 80°C by varying the relative mole ratio of carbon tetrachloride, used…
The role of grain surfaces and interfaces in nanocrystalline materials is investigated by X-ray diffraction (XRD). Two apparently distinct aspects show the importance of the interaction of a single grain with the environment in which it is placed: the role of grain-grain interaction in determining the residual stress…
Single crystals of diamagnetically diluted manganites, ${\mathrm{LaGa}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}{\mathrm{O}}_{3}$ $(x=0--0.2)$ have been investigated by means of magnetic-resonance techniques. Detailed study was performed of the NMR line shape, spin-spin and spin-lattice nuclear relaxation of ${}^{69}\mathr…
Patterns of cellular adhesion were created on a surface using novel photochemistry that is stimulated with visible light. A glass surface coated with polyethylene glycol is nonadhesive to a variety of adherent mammalian cell types. Treatment of that surface with a mixture of tris(bipyridyl)ruthenium(II) chloride, ammo…