TY - GEN A1 - Schröder, Hartmut A1 - Bahr, Horst A1 - Zeynalov, Eldar T1 - Determination of phenolic antioxidant stabilizers in PP and HDPE by means of an oxidative model reaction T2 - 6th International Plastics Additives and Modifiers Conference ; 6th Addcon World 2000 CY - Basel, Switzerland DA - 2000-10-25 PY - 2000 SN - 1-85957-242-1 IS - Paper 3 SP - 1 EP - 15(?) PB - RAPRA Technology Ltd. CY - Shawbury AN - OPUS4-952 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Schröder, Hartmut A1 - Zeynalov, Eldar A1 - Bahr, Horst A1 - Rybak, Thomas T1 - Analysing the content of antioxidants in PP materials PY - 2002 SN - 0967-3911 SN - 1478-2391 VL - 10 IS - 1 SP - 73 EP - 82 PB - RAPRA Technology Ltd. CY - Shrewsbury AN - OPUS4-1873 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Müller-Rochholz, J. A1 - Bronstein, Z. A1 - Schröder, Hartmut A1 - Rybak, Thomas A1 - Zeynalov, Eldar A1 - v. Maubeuge, K. P. ED - Delmas, P. T1 - Long-term behaviour of geosynthetic drains - excavations on landfills after up to 12 years service T2 - 7th International Conference on Geosynthetics (ICG) CY - Nice, France DA - 2002-09-22 PY - 2002 SN - 90-5809-525-8 VL - 2 SP - 565 EP - 568 PB - Balkema CY - Lisse AN - OPUS4-1902 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Schröder, Hartmut A1 - Bahr, Horst A1 - Lorenz, Edelgard A1 - Kneip, Gisela A1 - Kunze, Ines A1 - Zeynalov, Eldar T1 - Resistance of polyolefin geosynthetics to oxidationa new accelarated test working at elevated oxygen pressure PY - 2002 SN - 90-5809-529-0 N1 - Geburtsname von Kunze, Ines: Schmücking, I. - Birth name of Kunze, Ines: Schmücking, I. VL - 4 SP - 1455 EP - 1458 PB - Balkema CY - Lisse AN - OPUS4-1901 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Zeynalov, Eldar A1 - Friedrich, Jörg Florian A1 - Hidde, Gundula A1 - Ibrahimov, H.J. A1 - Nasibova, G.G. T1 - 1Brominated carbon nanotubes as effective catalysts for petroleum hydrocarbons aerobic oxidation KW - Katalyse KW - Paraffinoxidation PY - 2012 SN - 0342-5622 VL - 38 IS - 1 SP - 45 EP - 48 PB - Urban-Verl. CY - Hamburg; Wien AN - OPUS4-25636 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Ibrahimov, H.C. A1 - Friedrich, Jörg Florian A1 - Ismailov, E.H. A1 - Zeynalov, Eldar A1 - Aliyeva, A. Z. A1 - Seidov, M.I. A1 - Rustamov, M.I. T1 - Thermal and magnetic peculiarities of metal-containing carbon nano-phase formed in the reaction of fine-dispersed aluminium with dichlorethane in paraffin medium N2 - Electron magnetic resonance (EMR) spectroscopy, X-ray-fluorescent microscopy (XFM) and thermal analysis (TGA/DTA) are used to characterize the carbon nano-phase obtained in the reaction between fine-dispersed aluminium and dichlorethane in the liquid paraffin medium and its modified with Mn(II), Fe(III), Ni(II), Cu(II) chlorides forms were studied. It was shown that the solid nano-structured functionalized carbon systems containing metals possess specific magnetic and thermal properties. Key parameters of the process, influencing on the size and structure of the formed carbon nano-phase were determined. Results and regularities established in this work create presumably the certain basis for optimization of physical and chemical properties of similar systems. KW - Aluminium KW - Dichlorethane KW - Carbon nanostructure KW - Magnetic KW - Thermal properties PY - 2012 SN - 2161-6213 VL - 2 IS - 2 SP - 196 EP - 202 PB - David publishing CY - Libertyville, Illinois, USA AN - OPUS4-25639 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Zeynalov, Eldar A1 - Maherramova, S.N. A1 - Sadieva, N.F. A1 - Iskenderova, S.A. A1 - Agayev, B. K. A1 - Friedrich, Jörg Florian T1 - New softeners for polyvinylchloride N2 - Die Produktion von neuen effektiven und 'grünen' Weichmachern für Polyvinylchlorid (PVC) stellt eine der großen Herausforderungen in der chemischen Industrie dar. In diesem Beitrag wird über Ergebnisse von Untersuchungen berichtet, in denen symmetrische Ester einer Reihe von Fettsäuren und Triethylenglykol (TEG) gewonnen wurden und die als effektive Plastifizierungskomponenten verwendet wurden. Die Veresterung wurde unter Zugabe von Titandioxid Degussa P-25 in Nanopartikelgröße als umweltverträgliche Technologie durchgeführt. Eine gute Verträglichkeit und eine niedrige Flüchtigkeit der Ester auf Biobasis in den PVC-Rezepturen werden gezeigt und es konnten bessere physiko-mechanische Eigenschaften der PVC-Komposite eingestellt werden. Die Ester können als effektive und umweltfreundliche PVC-Weichmacher und als Ersatz für herkömmliche Phtalate empfohlen werden. KW - Softener KW - Polyvinylchloride PY - 2012 SN - 0025-5300 VL - 54 IS - 4 SP - 246 EP - 248 PB - Hanser CY - München AN - OPUS4-25747 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Zeynalov, Eldar A1 - Friedrich, Jörg Florian A1 - Meyer-Plath, Asmus A1 - Hidde, Gundula A1 - Nuriyev, L. A1 - Aliyeva, A. Z. A1 - Cherepnova, Y. T1 - Plasma-chemically brominated single-walled carbon nanotubes as novel catalysts for oil hydrocarbons aerobic oxidation N2 - Brominated single-walled carbon nanotubes [(Br)n-SWCNT) produced by the plasma-chemical technique were involved in the liquid-phase process of hydrocarbons aerobic oxidation. The significant catalytic effect of the (Br)n-SWCNT was revealed at first by the cumene initiated model oxidation and then in experiments on profound aerobic oxidation of petroleum naphthenic fraction derived from the commercial Azerbaijan (Baku) oils blend diesel cut. The ability of (Br)n-SWCNT to accelerate the aerobic oxidation of the hydrocarbons was found out for the first time. Obviously this phenomenon originates from the peculiarities of electronic configuration of the (Br)n-CNT patterns. The plausible mechanism of (Br)n-SWCNT catalytic action is inclined to the formation of reactive oxygen species. The catalytic activity of (Br)n-SWCNT markedly exceeds the activity of the industrial catalysts, manganese salt of indigenous petroleum acids, used for the liquid phase petroleum hydrocarbons oxidation process. KW - Brominated carbon nanotubes KW - Plasma-chemical technique KW - Model cumene oxidation KW - Oxidation rate KW - Oxidation catalysts KW - Oil hydrocarbons liquid-phase oxidation KW - Manganese naphthenate KW - Synthetic petroleum acids PY - 2013 DO - https://doi.org/10.1016/j.apcata.2013.01.003 SN - 0926-860X SN - 1873-3875 VL - 454 SP - 115 EP - 118 PB - Elsevier CY - Amsterdam AN - OPUS4-28290 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Friedrich, Jörg Florian A1 - Wettmarshausen, Sascha A1 - Meyer-Plath, Asmus A1 - Ziemann, Sylvia A1 - Hidde, Gundula A1 - Zeynalov, Eldar T1 - Plasmabromierung von graphitischen Materialien - Kovalente Anbindung organischer Moleküle N2 - Die hochselektive und ausbeutereiche plasmachemische Bromierung von Polyolefinoberflächen wurde auf graphitische Materialien übertragen. Oberflächen von graphenartigem Highly Oriented Pyrolytic Graphite (HOPG), natürlichem Graphit, mehrwandige Kohlenstoffnanoröhren (MWCNT) sowie Kohlenstoff-Fasern wurden im Bromdampfplasma behandelt. Während die Bromierung von Polyolefinoberflächen als radikalische Wasserstoffabstraktion mit nachfolgender Addition (Rekombination) oder durch nucleophile Substitution an sp³-hybridisierten C-Atomen abläuft, können graphitische Strukturen sowohl an sp³-hybridisierten Strukturdefekten als auch durch elektrophile Addition an vollständig C-substituierte aromatische Doppelbindungen bromiert werden. Dabei werden die planaren (graphitischen) sp²-C-Atome in die tetraedrische sp³-Hybridisierung umgewandelt und zu elektrisch nichtleitenden Strukturen gefaltet. Die maximalen Bromausbeuten bei Verwendung von Brom als Plasmamedium lagen je nach Substrat zwischen 10–50% Br/C, mit Bromoform deutlich darüber, was durch Kombinationen von Bromoform mit Brom oder Allylbromid mit Bromoform durch Schichtbildung auf über 70% Br/C gesteigert werden konnte. An die C-Br-Gruppen wurden nasschemisch verschiedene Amine nucleophil gepfropft. Die Pfropfausbeuten von 1–10 Moleküle je 100 C lagen deutlich niedriger als die erreichten Pfropfgrade von etwa 1–22 Moleküle je 100 C-Atome an Polyolefinoberflächen. Da nach der chemischen Pfropfung nahezu alle nichtgepfropften Br-Gruppen verschwunden waren, muss auf eine bevorzugte Rekonstruktion der planaren sp²-Graphitschicht geschlossen werden. KW - Polymerbromierung PY - 2012 DO - https://doi.org/10.1002/vipr.201200481 SN - 0947-076X SN - 1522-2454 VL - 24 IS - 1 SP - 24 EP - 29 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-25518 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Zeynalov, Eldar A1 - Friedrich, Jörg Florian T1 - Anti-Radical Activity of Fullerenes and Carbon Nanotubes in Reactions of Radical Polymerization and Polymer Thermal/Thermo-Oxidative Degradation PY - 2007 SN - 0025-5300 VL - 49 IS - 5 SP - 265 EP - 270 PB - Hanser CY - München AN - OPUS4-14806 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Zeynalov, Eldar A1 - Friedrich, Jörg Florian T1 - Antioxidative Activity of Carbon Nanotube and Nanofiber N2 - Carbon nanotubes (CNTs) and carbon nanofibers (CNFs) have electron affinities similar to those of fullerenes C60 and C70 and they are therefore capable of acting as radical scavengers in free radical chain reactions, including polymerisation and the thermo-oxidative degradation of polymers. It is assumed that the CNTs and CNFs used as integral part of polymer composites are able to exhibit an antioxidant effect in these materials because of their radical accepting capacity. To examine this presumption the antioxidative activity of original and purified commercial multiwall carbon nanotube MWCNT and carbon nanofibre of platelet structure CNF-PL has been studied by means of a model oxidation reaction of cumene initiated (2,2'-azobisisobutyronitrile, AIBN) in liquid phase. This model reaction was designed to simulate the thermo-oxidative processes in carbon-chain polymers and allows comparison and transfer of obtained results to a polymer system. Kinetic measurements of oxidation rates showed that the effect of inhibition for the model oxidative reaction in the presence of the original and purified MWCNT and CNF-PL strongly depends on the presence of metals (Co, Fe) in the nanoparticles. Rates of oxidation Wo2 (CNT;CNF) observed for the unrefined samples are result of the two competing rates - rate of inhibition Winh.(CNT; CNF) caused by structures of the CNT or CNF and the rates of initiation Wi(M) due to the following interaction: ROOH + M (Co;Fe) i.e, Wo2 ~ W inh (CNT;CNF) + Wi(M). The effective rate constants for the addition of cumyl radicals (R.) to MWCNT and CNF-PL have been determined. These constants reduced to the same concentration (0.5wt.%) and temperature (60°C) units have magnitudes: k1(MWCNT) [MWCNT] = (2.8 ± 0.3) x104 s-1and k1(CNF) [CNF] = (6.0 ± 1.0) x103 s-1. Thus, the effective rate constant, reflecting the antioxidative activity for the CNT, is five times higher than that for the CNF, is about equal to the rate constant for HAS Chimassorb 2020: k1(Chim.2020)[Chim. 2020] = (2.2 ± 0.3) x104 s-1, is ten times less than that for the HAS Chimassorb 119FL: k1(Chim.119FL)[Chim. 119FL] = (2.8 ± 0.3) x105 s-1 and is about forty times less than that for the case of fullerene C60: k1(C60)[C60](353K) = (1.2 ± 0.2) x106 s-1. The kinetic data obtained specify the level of original antioxidative activity of MWCNTs and CNFs and scope of their rational use in polymer composites. It is believed that the results will be helpful for designing optimal profile of polymer composites filled by the CNT/CNFs. KW - Model oxidation KW - Carbon nanotubes KW - Carbon nanofibres KW - Kinetics KW - Oxidation rate KW - Inhibiting activity KW - Rate constant PY - 2008 DO - https://doi.org/10.2174/1874088X00802010028 SN - 1874-088X VL - 2 IS - 1 SP - 28 EP - 34 PB - Bentham Open AN - OPUS4-17839 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Zeynalov, Eldar A1 - Aliyeva, A. Z. A1 - Friedrich, Jörg Florian T1 - Factors affecting the intrinsic anti-oxidative activity of carbon-nanofibers - Metallic impurities N2 - Nanotubes und Nanofasern (CNT, CNF) besitzen inhärente antioxidative Eigenschaften. Diese Fähigkeit könnte sehr nützlich für die Langzeitstabilität entsprechender Polymercomposite sein. Sie haben Elektronenaffinitäten ähnlich der von Fullerenen und sind deshalb in der Lage, Radikalfallen darzustellen und damit radikalische Kettenreaktionen zu unterbinden. Hier wurde die anti-oxidative Aktivität kommerzieller Nanofasern von Fischgrätenstruktur untersucht. Zunächst wurde der quantitative Einfluss von Ni-Verunreinigungen erfasst. Die eigentliche anti-oxidative Wirkung wurde mit einer aeroben Modelloxidation von Cumol verifiziert und deren kinetischen Parameter für kommerzielle und besonders gereinigte CNF-HBs bestimmt. CNF-HB inhibiert die Modellreaktion durch Einfangen der Peroxiradikale. Die Oxidation vollzieht sich nach einer ausgeprägten Induktionsphase in semi-logarithmischer Abhängigkeit für die speziell gereinigten Spezies. Es konnten erstmals die effektive Konzentration an inhibierenden Zentren und die Inhibierungs-Geschwindigkeitskonstante für CNF-HB bestimmt werden. Die Inhibierungs-Geschwindigkeitskonstante beträgt k7 = (6 ± 1.0) × 103lmol-1 s-1 und liegt damit in der für Anti-Oxidanzien erwarteten Größenordnung. KW - Nanotubes KW - Radical scavenger KW - Anti-oxidative behaviour PY - 2009 SN - 0025-5300 VL - 51 IS - 4 SP - 210 EP - 214 PB - Hanser CY - München AN - OPUS4-19253 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Friedrich, Jörg Florian A1 - Wettmarshausen, Sascha A1 - Hanelt, Sven A1 - Mach, Reinhard A1 - Mix, Renate A1 - Zeynalov, Eldar A1 - Meyer-Plath, Asmus T1 - Plasma-chemical bromination of graphitic materials and its use for subsequent functionalization and grafting of organic molecules N2 - Plasma-chemical bromination has been shown to be well-suited for highly selective and efficient C–Br-functionalization of polyolefin surfaces and has now been applied to graphitic materials, including highly oriented pyrolytic graphite (HOPG), natural graphite, carbon nanotubes, and graphitized carbon fibres. In contrast to the radical substitution of hydrogen by bromine at hydrogen-terminated sp3-hybridized carbon, bromination of all-carbon bound sp2-hybridized carbon in graphene requires addition to aromatic double bonds. The related change of sp2 to sp3 hybridization of the carbon atoms involved helps to explain experimental results of a loss in surface planarity on brominated HOPG. Bromine concentrations of up to 50 bromine atoms per 100 C-atoms were achieved in elemental bromine vapour under low-pressure plasma conditions using low-energetic inductively coupled radio-frequency plasma excitation. The time scale of the bromination progress was found to increase with the specific surface area of the material. The results of plasma-chemical bromination are compared to that of wet-chemical electrophilic addition reactions, which achieved 28 Br per 100 C for MWCNT. The resulting C–Br bonds from plasma-chemical processing of graphitic materials were shown to be well-suited for hydroxyl functionalization and for grafting of organic molecules by nucleophilic substitution with 1,6-diaminohexane and (3-aminopropyl)triethoxysilane. PY - 2010 DO - https://doi.org/10.1016/j.carbon.2010.06.054 SN - 0008-6223 SN - 1873-3891 VL - 48 IS - 13 SP - 3884 EP - 3894 PB - Pergamon Press CY - New York, NY AN - OPUS4-21954 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Zeynalov, Eldar A1 - Wagner, M. A1 - Friedrich, Jörg Florian A1 - Magerramova, M. A1 - Salmanova, N. A1 - Hidde, Gundula A1 - Meyer-Plath, A. T1 - The peculiar behavior of functionalized carbon nanotubes in hydrocarbons and polymeric oxidation environments N2 - It has been shown that selected types of substituents are able to vary the oxidative behavior of multi-walled carbon nanotubes. Such substituents investigated were sterically hindered secondary amino groups bonded in grafted piperidine units and covalently bonded bromine groups. Their interference and activity was preliminary determined in the model cumene and then in oil diesel fraction and low density polyethylene oxidation reactions. Results obtained indicate that chemical linking of amine moieties containing –NH groups directly to the carbon nanotubes core significantly increases their intrinsic anti-oxidative capacity while the grafting of Br-groups provokes the opposite functioning of the pristine samples. This inference was proved by thermogravimetric and differential thermal analysis of the polyethylene composites and experiments on profound aerobic oxidation of petroleum naphthenic fraction derived from the commercial Baku oils blend diesel cut. KW - Multi-walled carbon nanotubes KW - Amine derivatives KW - Plasma-chemical technique KW - Brominated carbon nanotubes KW - Rate of model oxidation KW - Anti-oxidative efficiency KW - Catalytic activity KW - Inhibition rate constant KW - Photoelectron spectroscopy KW - Oxidation KW - Polyethylene composites KW - Oil diesel fraction PY - 2016 DO - https://doi.org/10.1080/01694243.2016.1239304 SN - 0169-4243 SN - 1568-5616 VL - 31 IS - 9 SP - 988 EP - 1006 AN - OPUS4-39894 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -