Browsing Fakultät für Chemie (inkl. GAUSS) by Referee "Buback, Michael Prof. Dr."
Now showing items 21-40 of 51
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Polybutadien und Butadien enthaltende Copolymere mit gezielt eingebauten vulkanisierbaren Gruppen durch RAFT-Polymerisation
(2014-04-29)Reversible Addition Fragmentation Chain Transfer (RAFT) polymerisation is a radical polymerisation based on the principle of degenerative chain transfer. Polymers produced by this method feature a narrow polydispersity and ... -
Wetting heterogeneities in porous media
(2014-04-28)Multiphase flow in porous media is an important process for many technical and environmental applications such as fuel cells, oil recovery, CO2 storage among others. Understanding the rules that govern these flows is ... -
Kinetics and Modeling of the Radical Polymerization of Acrylic Acid and of Methacrylic Acid in Aqueous Solution
(2014-01-15)The radical polymerization of methacrylic acid, acrylic acid and acrylamide in aqueous solution has been investigated. Detailed kinetic models for both acrylic acid, AA, and methacrylic acid, MAA, have been developed ... -
Investigations into the Propagation and Termination Kinetics of the Radical Polymerization of Polar Monomers in Aqueous Solution
(2013-05-27)Propagation and termination rate coefficients of radical polymerizations in aqueous solution were determined from pulsed-laser induced polymerizations and chemically initiated polymerizations. Pulsed-laser induced ... -
Investigation of the Kinetics and Mechanism of RAFT Polymerization via EPR Spectroscopy
(2013-02-12)This thesis provides new insights into the mechanism and kinetics of reversible addition-fragmentation chain transfer (RAFT) polymerizations. Electron paramagnetic resonance (EPR) spectroscopy experiments to determine the ... -
Nano-Carrier Synthesis via Z-RAFT Star Polymerisation
(2012-11-21)In this project the establishment of nano-scaled and monomolecular objects working as carrier system was investigated. Such nano-carriers find application in drug delivery, catalysis or as templates for hybrid nanomaterials. ... -
Kinetik von Atom-Transfer Radikalischen Polymerisationen bis zu hohen Drücken
(2012-11-02)Atom-transfer radical polymerization (ATRP) has been studied up to 2500 bar via online VIS/NIR-spectroscopy to monitor the evolution of both CuII concentration and monomer conversion. ATRP-equilibrium constants have been ... -
Polybutadien und Butadien enthaltende Copolymere mit kontrollierter Kettenstruktur mittels RAFT-Polymerisation
(2012-05-24)Reversible addition-fragmentation chain transfer (RAFT) polymerization has received great scientific and industrial attention, due to its versatility in producing well-defined complex macromolecular architectures with ... -
Radical Polymerization Kinetics in Systems with Transfer Reactions Studied by Pulsed-Laser-Polymerization and Online EPR-Detection
(2011-11-22)The SP-PLP-EPR technique has been developed for very detailed kinetic investigations into radical polymerization. The method which combines single-pulse-pulsed-laser-polymerization (SP-PLP) ... -
Untersuchungen zur Elektrokatalyse von Hochtemperatur-Polymerelektrolytmembran-Brennstoffzellen (HT-PEMFCs)
(2010-02-22)This work deals with the optimisation of the cathode composition to enhance the performance of high temperature polymer electrolyte membrane fuel cells (HT-PEMFCs). Phosphoric acid doped ... -
Synthesis and Characterization of Ethylene-Acrylic Acid Copolymers Produced under High Pressure
(2009-07-28)Free-radical copolymerizations of ethene (E) with acrylic acid were carried out in a continuously operated stirred tank reactor at pressures up to 2300 bar and temperatures up to 300 °C. ... -
Synthese, biologische Evaluation und Untersuchung des Wirkmechanismus neuartiger Duocarmycin-Analoga für eine selektive Krebstherapie
(2009-03-24)Despite considerable efforts towards the development of efficient cancer therapies, most anti-cancer agents applied so far in the clinic cause severe side effects because their cytotoxic ... -
Mikro- und makroskopische Eigenschaften von statistisch und nicht-statistisch aufgebauten Copolymeren
(2008-05-09)Polymer properties may be significantly affected by copolymerization. The present study focuses on the copolymerization of a non-polar monomer with a highly polar one, taking the system ethene – methacrylic acid (MAA) ... -
RAFT-Polymerisation an Oberflächen
(2007-07-24)Heterogeneous Reversible Addition-Fragmentation Chain Transfer (RAFT) polymerizations using solid-supported dithiobenzoates, trithiocarbonate, and xanthates, respectively, using nanometer-sized ... -
Synthesen von Organogalliumhydriden und Organogalliumhalogeniden
(2007-06-26)This dissertation describes how gallium hydride can be stabilised with arduengo carbenes. Furthermore the structure of gallium hydride vinamidine was researched. One focus was the reactivity ... -
Quantendynamik von S>N2-Reaktionen
(2007-03-05)This thesis presents quantum mechanical investigations of the mechanism involved in nucleophilic bimolecular substitution reactions (SN2 reactions). The SN2 mechanism i importan both for application in a wide ... -
Spektroskopische Untersuchungen zur Kinetik und Produktbildung bei Reaktionen von zyklischen und offenkettigen Kohlenwasserstoff-Radikalen
(2006-10-25)Reactions of pure and partly oxygenated hydrocarbon radicals are of major interest in two different fields: On the one hand tailored polymerisation products are of daily use in different ... -
Messung und Modellierung der Initiatoreffektivität organischer Peroxide in der Ethen-Hochdruckpolymerisation
(2006-05-31)In this thesis the initiator efficiency of assymetric dialkyl peroxides (tert-Butyl-O-O-R1) and diverse tert-alkyl peroxyesters (R2-(C=O)-O-O-R3) was determined in the high-pressure ... -
Pyrazolliganden mit Imin-Seitenarmen und ihre zweikernigen Palladium(II)- und Nickel(II)-Komplexe: neue bimetallische Katalysatoren für die Olefinpolymerisation
(2006-01-10)A series of compartmental pyrazole/imine dinucleating ligands (L) with various backbone substituents and different steric bulk of the appended aryl imine groups has been prepared. With ... -
Detailed Investigations into the Propagation and Termination Kinetics of Bulk Homo- and Copolymerization of (Meth)Acrylates
(2005-08-16)Three aspects of free-radical polymerization have been addressed: (i) the propagation rate in acrylate/methacrylate copolymerizations, (ii) the chain-length dependence of the termination ...