Materials Literature
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Abstract A series of novel biodegradable aromatic– aliphatic poly(ester amide)s containing approximately equal amounts of amide and ester groups were successfully prepared through the interfacial polycondensation of 1,6‐hexanediamine and aromatic diacylchlorides containing ethylene oxide moieties. The structure of the…
Hereinafter we discuss our last five years investigations in the field of new highly efficient polymers for liquid crystal (LC) photoalignment. New polymers finally proposed are based on methacryloylaminoarylmethacrylates with two methacryloyl groups of different reactivity. Fries rearrangement and photocrosslinking/p…
Static and dynamic characteristics of layerwise growth in two-dimensional quasiperiodic Ito-Ohtsuki tilings are studied. These tilings are the projections of three-dimensional stepped surfaces. It is proved that these tilings have hexagonal self-similar growth with bounded radius of neighborhood. A formula is given fo…
The aim of this work is to study the replacement of currently used thermoplastics by composites reinforced with vegetable fibers with several advantages, mainly better mechanical properties, low weight and competitive cost compared to its counterparts. Extrusion and injection molding processes were studied using polyp…
Abstract The nonisothermal crystallization kinetics of a metallocene‐made isotactic polypropylene (m‐iPP) and its compounds with 0.1 wt % and 0.3 wt % of a sorbitol derivative [1,3:2,4‐bis(3,4‐dimethylbenzylidene)sorbitol (DMDBS); an α nucleator] were investigated by differential scanning calorimetry at different cool…
A highly fluorescent s-triazine (ST) bridged p-phenylene vinylene (PPV) polymer was synthesized by the Wittig polycondensation reaction of 4, 6-bis (4-formylphenoxy)-2-diphenylamino-s-triazine and 2, 5-bis (triphenylphosphonionmethyl)-1, 4-bis (trimethylsilyl) benzene dibromide, to afford ST bridged PPV polymer (DTTPV…
In this study, oil palm empty fruit bunch fibres (EFB) reinforced polypropylene (PP) composites were prepared by two different methods i.e. physical treatment of the composites using electron beam irradiation and chemical treatment by adding coupling agent such as maleated PP. The composites pellets were then subjecte…
In the case of doped polymer system SHG efficiency is proportional to the concentration and orientation degree of NLO-active molecules. Unfortunately, corona poling realised at elevated temperatures causes concentration decrease of NLO-active molecules due to crystallization. On the basis of our studies of the film op…
Abstract Flexible heaters were prepared by extruding platinum‐catalyzed silicone rubber (SR) compound with carbon black (CB)/multiwalled carbon nanotube (MWNT) and CB/SnO 2 ‐Sb coated titanium dioxide (TiO 2 ). MWNT with average particle length of 20 μm and acicular shaped TiO 2 with average particle length of 1.7 μm…
Abstract The effect of different coagents on the physico‐chemical properties of NBR/HDPE composites reinforced with 40 phr (part per hundred part of rubber by weight) HAF carbon black and cured with accelerated electrons was investigated. The coagents N , N ′‐methylene bisacrylamide (MBAAm) and trimethylol propane tri…
The bacterial envelope stress response, which is responsible for sensing stress signals in the envelope and for turning on the sigma(E)-dependent transcription, is modulated by the binding of RseB to RseA. In this study, the solution structures of RseA and its complex with RseB were analyzed using circular dichroism a…
New polyimide precursors were synthesized by simple one step procedure. (Z)-3-(4-Nitro-phenylcarbamoyl)-acrylic acid (A2), (Z)-3-(4-Ciano-phenylcarbamoyl)-acrylic acid (A3), (Z)-3-(4-Diethyl-phenylcarbamoyl)-acrylic acid (A4) and (Z)-3-[N′-(2,4-Dinitro-phenyl)-hydrazinocarbonyl]-acrylic acid (A6) were characterized by…
Identification of structures of active sites of catalysts under realistic conditions is key for understanding the structure-reactivity relationship and mechanism of catalytic reactions. Various in situ techniques and novel theoretical concepts (e.g. ab initio atomistic thermodynamics) have been developed. As an exampl…
This article discusses the mechanical properties of different composites based on pine, oak wood, rapeseed straw and isotactic polypropylene. The surface of the filler was modified with acetic anhydride to enhance the compatibility between hydrophilic lignocellulosic components and hydrophobic polypropylene matrice. A…
Linear response calculations of the magnetic exchange interactions in Mn-doped ScN were carried out in the rigid-spin approximation by using the muffin-tin-orbital Green's function method. They show that the exchange interactions are long range and strongly affected by disorder, band gap corrections, and doping. The c…
Natural fibres well protected against biodeterioration and with barrier properties can be used in many new applications. The study aims at using eco-friendly biocides, not used in textile industry so far, for antimicrobial finishing of natural fibres. The research was carried out on flax fibre and linen fabric protect…
Polar oxide surfaces constitute a class of surfaces long considered as unstable because of their theoretically predicted diverging electrostatic surface potential, although such crystal orientations form spontaneously in nature. Because of the intrinsic hindrances (charge build-up, electron correlation effects) a reli…
Soluble anthracenedicarboxyimides have been prepared and undergo a photodimerisation of the anthracene skeleton, which is important for their application as antitumour agents, such as azonafides. Reaction under strongly alkaline conditions causes C-C coupling to form soluble dimeric fluorescent dyes with bathochromic…
Don't worry about bandgap. Reversible electrical bistability in a monolayer of different nanoparticles, such as CdS, CdSe, PbS, and PbSe leads to memory phenomenon in single nanoparticles. Electrical bistability and memory applications are studied in semiconducting nanoparticles of different bandgaps (see image). The…
Polypropylene-based composites containing 10–30% by weight cellulose microfibrils were studied. Composites with polypropylene and cellulose microfibrils were characterised by MS-coupled simultaneous TGA-DSC and the reinforcing effect of cellulose microfibrils was emphasised by mechanical characterization. Experimental…