Dokumente Fakultät für Chemie (inkl. GAUSS) nach Gutachter "Buback, Michael Prof. Dr."
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Kinetics and Mechanism of Cu-Catalyzed Atom Transfer Radical Polymerization
(2015-10-28)The kinetics and mechanism of Cu-mediated atom transfer radical polymerization (ATRP) were investigated with particular emphasis on the ATRP deactivation rate coefficient, k_deact . The method of pulsed laser polymerization ... -
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 ... -
Kinetik der konventionellen radikalischen und der RAFT-Polymerisation an Nanopartikeloberflächen
(2016-07-22)This thesis provides new insights into the kinetic and mechanistic aspects of the con-ventional radical and the reversible addition–fragmentation chain transfer (RAFT) polymerization from the surface of silica nanopartic ... -
Kinetik radikalischer Polymerisationen ionischer Monomere in wässriger Lösung: Spektroskopische Analyse und Modellierung
(2016-07-20)This work targets the radical polymerization of ionic monomers in aqueous solution. Rate coefficients were determined by pulse-laser polymerization in conjunction with size-exclusion chromatography (PLP–SEC), with near-infrared ... -
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 ... -
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 ... -
Metal-Catalyzed Radical Polymerization up to High Pressure
(2015-09-28)The mechanism and kinetics of metal-catalyzed radical polymerization were investigated by spectroscopic means. A particular focus was set on Fe-mediated atom-transfer radical polymerization (ATRP) as there is a growing ... -
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) ... -
Mikrophasenseparation von photo-vernetzbaren Blockcopolymeren in dünnen Filmen
(2015-03-23)The micro-phase behavior of diblock copolymers with integrated UV-crosslinkable units has been investigated by atomic force microscopy (AFM) as well as their mechanical properties. Further, the influence of crosslinkers ... -
Modellierung der Kinetik und Mikrostruktur radikalischer Polymerisationen bei hohen Drücken und Temperaturen
(2005-08-16)The kinetics of the homopolymerization of butyl acrylate at high pressure and temperature was investigated. Branches, terminal double bonds and the amount of trimer were analyzed quantitatively ... -
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. ... -
Pfropfung funktioneller Monomere auf Polymermembranen
(2015-02-18)The grafting of glycidyl methacrylate (GMA) on microporous cellulose membranes using ceriumIV was investigated. The grafted polymer was sulfonated to be used for ion exchange. It was shown that during the grafting of GMA ... -
Photon-Echo-Spektroskopie zur Dynamik der Solvatation in Wasser und an Lipidmembran-Wasser-Grenzschichten
(2002-07-02)The thesis focuses on the molecular mechanisms of ultrafast solvation at the interface of synthetic phospholipid-membranes. For the first time, photon-echo spectroscopy is used as a tool ... -
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 ... -
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 ... -
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 ... -
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 ... -
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) ... -
Radical Polymerization Kinetics of Non-Ionized and Fully-Ionized Monomers Studied by Pulsed-Laser EPR
(2016-06-29)The radical polymerization kinetics of non-ionized and fully-ionized monomers in organic and aqueous solution was investigated by SP–PLP–EPR, i.e., highly time-resolved single-pulse–pulsed-laser–polymerization (SP–PLP) in ... -
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 ...