Browsing Fakultät für Chemie (inkl. GAUSS) by Advisor "Buback, Michael Prof. Dr."
Now showing items 1-20 of 23
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Cu- and Fe-mediated Atom-Transfer Radical Polymerization in Aqueous Solution
(2016-08-01)The mechanism and the kinetics of metal-catalyzed radical polymerization were investigated by spectroscopic methods and by PREDICI® simulation. A particular focus was on Cu- and Fe-mediated atom-transfer radical polymerization ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
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) ... -
Massenspektrometrische und quantenchemische Studien radikalischer Polymerisationen zur Initiierung mit Peroxycarbonaten
(2010-01-18)In the present work poly(methyl methacrylates), synthesized via radical polymerization in benzene solution with different peroxycarbonates, were studied by means of electrospray ionization ... -
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. ... -
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 ... -
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 ... -
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 ... -
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 ... -
Bestimmung und Modellierung der Initiatoreffektivität von Diazenen in der Ethen-Hochdruckpolymerisation
(2005-07-29)In this thesis the initiator efficiency of diazenes (azoalkanes), R-N=N-R', in the high-pressure ethene polymerization was determined in a continuously stirred tank reactor. The initiator ... -
Kinetische und thermodynamische Untersuchungen der Hochdruck-Copolymerisation von Ethen mit (Meth)Acrylsäureestern
(2005-03-18)Kinetic and thermodynamic aspects of the high-pressure copolymerization of ethene and (meth)acrylic acid(esters) have been studied in wide ranges of temperature and pressure. Reactivity ... -
Terminierungskinetik radikalischer Homo- und Copolymerisationen bis zu hohen Monomerumsätzen
(2003-07-22)The termination kinetics of free-radical homo- and copolymerizations have been investigated up to high monomer conversions using the SP-PLP technique (Single Pulse-Pulsed Laser Polymerization). ...