Materials Literature
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Abstract Ultrafine fiber mats of hydroxypropyl methyl cellulose phthalate (HPMCP) were successfully electrospun and explored as drug delivery vehicles using erythromycin as a model drug. The morphology of the electrospun fiber and the drug release process in the artificial gastric juice and in the artificial intestina…
Abstract The combination of tin carboxylate heat stabilizer and a dimethylaminopropyl methacrylamide‐titanate adduct enables anaerobic landfill decomposition of plasticized poly(vinyl chloride) (PVC). Through a mechanism as yet not understood, the above combination directs decomposition under anaerobic conditions to c…
The title 1,4-dioxane solvate, C8H4FNO2·C4H8O2, was isolated during a manual crystallization screen on 7-fluoroisatin (7-fluoroindoline-2,3-dione). The 7-fluoroisatin molecule occupies a general position and each of the independent molecules of 1,4-dioxane is disposed about a centre of inversion, with half of eac…
Abstract Bismaleimides with main chains of different structures were prepared by the reaction between maleic anhydride and various diamines and by the reaction between 4‐maleimidobenzoylchloride and 3,5‐dihidroxybenzoic acid. The monomers were characterized with IR and 1 H‐NMR spectroscopy. Polymers based on these com…
We investigate the single-particle orientational dynamics of rodlike molecules across the isotropic-nematic transition in computer simulations of a family of model systems of thermotropic liquid crystals. Several remarkable features of glassy dynamics are on display including nonexponential relaxation, dynamical heter…
Abstract This paper deals with the problem of T‐bar penetration. New kinematically admissible velocity fields are derived from elastic solutions of incompressible material using Airy stress function. These velocity fields are used to obtain upper bounds to collapse loads. Two particular solutions are presented, one fo…
It is well established (from which the general interest arises!) that nanomaterials (NM) display properties and behavior that can be very different compared to the corresponding bulk materials of the same chemical composition. Size, shape, and surface state are properties accounting for most of their differences (1,2)…
Abstract Nanosilica (SiO 2 ) is used as a reinforcing filler in PP/elastomer thermoplastic polyolefin (TPO) blends containing ethylene‐octene polyolefin elastomer (POE), ethylene‐propylene rubber (EPR), and maleated EPR. The localization and dispersion of the filler are controlled by adding maleated derivatives to the…
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…