Materials Literature
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Abstract Photografting polymerization of polyacrylamide (PAM) onto poly(3‐hydroxybutyrate‐ co ‐3‐hydroxyvalerate) (PHBV) films using benzophenone as photoinitiator was studied. The morphology and structure of the grafted PHBV film were characterized by Fourier transformed infrared spectroscopy (FTIR) with attenuated t…
Abstract The determination of the optimal feed profiles for a reactive crystallizer is an important dynamic optimization problem, as the feed profiles offer a significant control over the quality of the product crystals. Crystallization processes typically have multiple performance objectives and optimization using di…
By adopting a "covalent-coordinate" bonding approach, novel supramolecular pentad and triad molecules composed of zinc-porphyrin(s), fullerene(s), and oxoporphyrinogen redox-/photoactive entities have been constructed, and also characterized by means of spectral and electrochemical techniques. The geometry and electro…
Going through a phase: By using simple glass-forming liquid crystals (LCs) in situ, gold nanoparticles (GNPs) were synthesized shape selectively and assembled spontaneously to generate ribbonlike patterns that are replicas of native LC organizations. This remarkable approach afforded boomerang- and V-shaped GNPs.
Abstract Silicone–epoxy resins were synthesized through hydrosilylation of 1,2‐epoxy‐4‐vinyl‐cyclohexane with 1,3,5,7‐tetramethycyclotetrasiloxane. The silicone–epoxy resins showed high reactivity in the presence of aluminum complex/silanol compound catalysts. Curing of the resins was effected at extremely low concent…
Geologists have "known" for many years that continental crust is buoyant and cannot be subducted very deep. Microdiamonds 10-80 microm in size discovered in the 1980s within metamorphic rocks related to continental collisions clearly refute this statement, suggesting that material of continental crust has been subduct…
Amino acids are widely used in food, chemical, agricultural, cosmetic, and pharmaceutical products. Crystallization is one of the key steps in their manufacturing processes. However, for a complex multicomponent system with solvates and compounds, it is not clear how to recover a specific amino acid or its salt. To ad…
Abstract 2,6‐Diphenoxybenzonitrile (DPOBN) was synthesized by reaction of phenol with 2,6‐difluorobenzonitrile in N ‐methyl‐2‐pyrrolidone in the presence of KOH and K 2 CO 3 . Poly(aryl ether ketone ketone)/poly(aryl ether ether ketone ketone) copolymers with pendant cyano groups were prepared by the Friedel–Crafts el…
Abstract A series of rubber composites with ultra high cis polybutadiene (UBR), NUC1–3, SBC1–4, SUS1–4, was prepared, and their vulcanized properties were measured and analyzed. The ultra high cis polybutadiene was prepared with the monomeric neodymium catalyst, Nd(neodecanoate) 3 ·(neodecanoic acid). NUC composites w…
The fructose-1,6-bisphosphate aldolase gene from the thermophilic bacterium, Anoxybacillus gonensis G2, was cloned and sequenced. Nucleotide sequence analysis revealed an open reading frame coding for a 30.9 kDa protein of 286 amino acids. The amino acid sequence shared approximately 80-90% similarity to the Bacillus…
The design and synthesis of a novel type of bisphthalocyanines, anti- [2.2](1,4)phthalocyaninophanes, were reported. The phthalocyanine dimer exhibited significantly split and red-shifted absorption in the near-IR region and maintained the fluorescence properties of phthalocyanines. The origin of the electronic commun…
The synthesis and characterization of a series of neo-pentoxide (OCH2C(CH3)3 or ONep) derivatives of group 3 and the lanthanide (Ln) series' metals were undertaken via an amide/alcohol exchange route. Surprisingly, the products isolated and characterized by single-crystal X-ray diffraction yielded isostructural specie…
Abstract The reinforcement of silicone rubber (SR) imparted by different types of fillers was investigated. Glass fiber (GF), wollastonite and fluoro rubber (FR) as nontraditional filler for rubber were compounded SR and mechanical properties of the prepared composites were evaluated. The addition of silane pretreated…
Abstract Aqueous polyurethane dispersions were prepared from toluene di‐isocyanate, polytetramethylene glycol, and 1,4‐butanediol, with different weight percent of dimethylol propionic acid (DMPA) as anionic center. IR Spectroscopy was used to follow the polymerization reaction as well as the polymer characterization.…
Abstract In this study, a commercially available nano‐sized silica (SiO 2 ) was surface‐modified via esterification with oleic acid (OA), a relatively inexpensive and hydrophobic modifier, and characterized by FTIR, NMR, SEM, EDS, and TGA measurements. Various amounts of the surface‐modified silica nanoparticles (SiO…
Ground- and excited-state magnetic properties of recently characterized pi-conjugated photomagnetic organic molecules are analyzed by the means of density functional theory (DFT). The systems under investigation are made up of an anthracene (An) unit primarily acting as a photosensitizer (P), one or two iminonitroxyl…
By means of dielectric spectroscopy, we have studied the relaxation dynamics of poly(vinyl methyl ether) (PVME) in miscible blends with polystyrene (PS) at several concentrations in a broad range of pressure and temperature. Several interesting phenomena which take place in these kinds of blends have been investigated…
We have studied the magnetic properties of free cobalt clusters in two semi-independent Stern-Gerlach deflection experiments at temperatures between 60 and $307\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. We find that clusters consisting of 13--200 cobalt atoms exhibit behavior that is entirely consistent with superparamag…
Abstract In this study, polyimide–silica (PI–silica) based hybrid coating compositions were prepared from tetraethoxysilane (TEOS), γ‐glycidyloxypropyl trimethoxy silane (GOTMS), and polyamic acid (PAA) via a combination of sol–gel and thermal imidization techniques. PAA was synthesized from 3,3′,4,4′‐benzophenone tet…
Abstract Three different polyethylene/polypropylene (PE/PP) blends were microcellular foamed and their crystallinities and melt strengths were investigated. The relationship between crystallinity, melt strength, and cellular structure was studied. Experimental results showed that the three blends had similar variation…