Blättern Fakultät für Chemie (inkl. GAUSS) nach "Buback, Michael Prof. Dr." Betreuer
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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 ... -
Controlled radical polymerization at pressures up to 2000 bar
(2001-07-26)High-pressure controlled polymerizations of styrene and of butyl acrylate were successfully performed using different nitroxides as mediator. Narrow polydispersities and molecular weights ... -
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 ... -
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 ... -
Initiierungseffektivität von linearen und zyklischen Dialkylperoxiden in der Ethen-Hochdruckpolymerisation
(2001-06-29)Transfer constants in ethene homo-polymerization for two aldehydes and one ketone were determined using the mayo-method and the chain-length-distribution method. Various peroxides were used ... -
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 ... -
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 ... -
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 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 ... -
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 ... -
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 ... -
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) ... -
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 ... -
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 ...