Materials Literature
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This paper presents two novel hierarchical structures of SiC–SiO2 core–shell nanowires: (a) nanocables in the form of multi-core and single shell and (b) nanowebs in the form of intersecting nanowires and nanocables, augmented by variable amounts of SiO2 membranes. The two structures are controllable through variation…
Abstract This study focuses on the effect of isocyanate (NCO)/hydroxyl (OH) group ratios and chemical modification of oil palm empty fruit bunches (EFBs) with toluene diisocyanate (TDI) and hexamethylene diisocyanate (HMDI) on the mechanical properties of EFB–polyurethane (PU) composites. The tensile, flexural, and im…
A wide range of (Bi1−xSbx)2Te3 thin films and nanowires were electrodeposited from acidic tartaric–nitric baths. Initially, (Bi1−xSbx)2Te3 thin films were electrodeposited on gold substrates to investigate the effect of the deposition potential and electrolyte composition on film composition. After these investigation…
Abstract The self‐assembly of PVPh‐ b ‐PS in different solvents was studied. Upon replacing toluene by THF as the solvent, the morphology of the resulting aggregates change from core‐shell spheres, rod‐like micelles and vesicles to onion‐like aggregates. With increasing block copolymer concentration, morphologies such…
Abstract Hyperbranched poly( p ‐phenylene ethynylenes) (HB‐PPEs) were synthesized in an A 2 + B 3 one‐pot approach by the Pd/Cu‐catalyzed cross‐coupling reaction of 1,4‐diethynyl‐2,5‐bis‐(octyloxy)benzene and 1,2,4‐tribromobenzene. Reaction conditions were varied with the objective to obtain well‐defined HB‐PPEs of di…
Abstract 6‐ tert ‐Butyl‐ and 6‐phenylazulene reacted with pyrrole and benzaldehyde in a molar ratio of 1:3:4 in the presence of BF 3 · Et 2 O in chloroform, followed by oxidation with DDQ, to give 2 3 ‐substituted tetraphenylazuliporphyrins in 15–20 % yield. Slightly higher yields of the related meso ‐tetrakis(4‐chlor…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Abstract A series of meso ‐coumarin‐conjugated porphyrins 1a – e were designed and synthesized. Condensation of 4‐chloroacetoacetate ethyl ester with m ‐cresol or resorcin afforded 4‐chloromethylcoumarins, which were then hydrolyzed to give coumarin alcohols, followed by oxidation to provide coumarin aldehydes. The re…
Abstract By adding a small amount of clay into poly( p ‐phenylene sulfide) (PPS)/polyamide 66 blends, the morphology was found to change gradually from sea–island into cocontinuity and lamellar supramolecular structure, as increasing of clay content. Clay was selectively located in the PA66 phase, and the exfoliated c…
The authors have previously proposed a novel technique for the preparation of water-soluble carbon nanotubes (CNTs) using microplasma generated by a pulsed streamer discharge in water. This paper describes an improvement in the method of the microplasma-based CNT solubilization process by the use of gas bubbling in wa…
Abstract Hindered amine stabilizers (HAS) remain a prominent class of stabilizers having a fortunate development with continuous interest in shaping the future properties of plastics: increase in polymer durability, application extension, reaching new effects. Commercial tests provided much information. Insufficient m…
Abstract Thermoplastic vulcanizates (TPVs) from natural rubber (NR) and polypropylene (PP) were studied, prepared by dynamic vulcanization during melt mixing, using various peroxides to crosslink the rubber phase. The objective was to find a proper balance between degree of crosslinking of the rubber and degradation o…
We present a finite element implementation of a Cosserat elasto-plastic model and provide a rigorous numerical analysis of the introduced time-incremental algorithm. The model allows the use of standard tools from convex analysis as known from classical Prandtl–Reuss plasticity. We derive the dual stress formulation a…
We assigned l-talarate dehydratase (TalrD) and galactarate dehydratase (GalrD) functions to a group of orthologous proteins in the mechanistically diverse enolase superfamily, focusing our characterization on the protein encoded by the Salmonella typhimurium LT2 genome (GI:16766982; STM3697). Like the homologous mande…
Abstract A cationic water‐soluble polyfluorene (P2) containing a high density of tetraalkylammonium side chains in polymer backbone was synthesized and characterized. The polymer shows excellent water solubility up to 100 mg · mL −1 as well as high photoluminescence (PL) quantum yield of 44% in water. The relatively h…
Abstract Blends of thermoplastic starch with poly(ethylene‐co‐vinyl alcohol) copolymer (EVOH) were melt extruded with water/glycerol as plasticizer and a series of amino acid additives. The biggest factor in end‐use mechanical properties proved to be the relative humidity (RH) during storage. Plasticized starch‐EVOH b…
The first book to tackle the application of smart polymers in bioseparation and bioprocessing, Smart Polymers: Applications in Biotechnology and Biomedicine broke new ground in this challenging field. Completely revised, updated, and following in the footsteps of its predecessor, the second edition is poised to take i…
We summarize a theoretical framework based on global time-reparametrization invariance that explains the origin of dynamic fluctuations in glassy systems. We introduce the main ideas without getting into much technical details. We describe a number of consequences arising from this scenario that can be tested numerica…
Shape control: The morphology of bismuth ferrite (Bi2Fe4O9) crystals grown by a hydrothermal method was found to depend strongly on the concentration of hydroxide ions in the presence of surfactant. Bi2Fe4O9 nano- and microcrystals with controllable morphologies (sheets, plates, cubes, rectangular rods, and fibers; se…
Abstract In this article, to form a structure‐controlled interface, carbon fiber (CF) surfaces were first activated by plasma technique and then hydroxylated by LiAlH 4 treatment, and then were reacted with a suit of silane‐coupling agents terminated with desired functional groups to form thin films, which further rea…