Dokumente Fakultät für Chemie (inkl. GAUSS) nach Gutachter "Buback, Michael Prof. Dr."
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Advances in chain-growth control and analysis of polymer: boosting iodine-mediated polymerizations and mastering band-broadening effects in size-exclusion chromatography
(2015-10-23)In the present thesis, various novel iodine-mediated reversible-deactivation radical polymerization (RDRP) techniques were investigated. In addition, effects of instrumental band broadening (BB) in size-exclusion chromatography ... -
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 ... -
Binary Planet–Satellite Nanostructure Using RAFT Polymer
(2020-08-06)This thesis provides a series of strategies to fabricate hierarchically arranged nanohybrids from distinct nanoparticles using polymer linkers. Benefit from the controlled reversible-deactivation radical polymerization ... -
Bioinspirierte Titin-analoge Polymere
(2014-11-21)Bioinspired polymers imitating the multiple domain structure of the muscular protein Titin on the basis of hydrogen bond bearing cyclic precursor polymers have been synthezised and their mechanical properties have been ... -
Biomimetic Polymer Systems via RAFT Polymerization - Routes to High-Performance Materials
(2016-12-13)Nature provides numerous examples of structural materials with outstanding mechanical properties. An especially intriguing material is spider dragline silk that outmatches man-made high-performance fibers such as Kevlar ... -
Chain-transfer kinetics for free-radical homo- and coplymerizations of styrene and methyl methacrylate in supercritical carbon dioxide
(2001-07-25)Chain-transfer kinetics have been studied for styrene and MMA homo- and copolymerizations in bulk and in solution of supercritical CO2 (40 wt % scCO2). Three chain-transfer agents (CTAs) ... -
Characterization of Physical and Chemical Properties of Synthetic Polymer using Ion Mobility-Mass Spectrometry
(2017-12-13)This thesis focuses on developing analytical methodologies based on ion mobility-mass spectrometry (IM-MS) for both physical and chemical properties of synthetic polymer. Beyond numerical experimental data, a comprehensive ... -
Charakterisierung maßgeschneiderter makromolekularer Systeme: Analyse von photoschaltbaren Polymeren und Untersuchung der Wärmeleitfähigkeit von Polymeren und Polymernanokompositen
(2021-04-23)In this work, tailored azobenzene-based polymers were synthesized and characterized with respect to their isomerization kinetics, micro structure and thermal conductivity. Additionally, the thermal conductivity of ... -
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 ... -
Der Einfluss der UV-initiierten RAFT-Polymerisation auf die Strukturen und Eigenschaften von Polymernetzwerken
(2014-09-26)In this work the influence of the Reversible Addition-Fragmentation chain Transfer (RAFT)-polymerization on the microstructures and the resulting properties of polymer networks was investigated. Elastomeric, statistical ... -
Erzeugung von Radikalen aus teilhalogenierten Methan-, Alkohol- und Etherderivaten und deren Reaktionen sowie thermische und chemische Aktivierung von 1-Ethinyl-1-methylcyclopropan in der Gasphase
(2002-05-15)Partially fluorinated hydrocarbons, ethers and alcohols are discussed as substitutes of HCFC in the context of air pollution, thus motivating kinetic studies of the involved radicals for ... -
Erzeugung, Nachweis und Reaktionen reiner, teiloxidierter und substituierter Kohlenwasserstoffradikale in der Gasphase
(2002-05-15)Products and rates of the reactions of 1,1,1-Trichlorethane, Isobutylchloride, Di-t-Butyl-Peroxide, t-Butyl-Peroxy-Pivalate and Dimethoxymethane with Fluorine atoms are examined in ... -
Femtosekunden-Spektroskopie zur Protontransfer-Dynamik im elektronisch angeregten Zustand von 1.8-Dihydroxy-9.10-Anthrachinon
(2003-10-17)This thesis investigates the connection between the non-radiative relaxation dynamics of 1.8-dihydroxy-9.10-anthraquinone (1.8-DHAQ) and the intramolecular proton-transfer in the first ... -
Funktionelle Polymere mittels kontrollierter Polymerisationstechniken: Von der Massenspektrometrie endfunktionalisierter Polymere und den mechanischen Eigenschaften photovernetzbarer Blockcopolymere
(2019-02-06)In this thesis polymers were functionalized with terminal ammonium groups leading to new fields of their application. Their analysis by mass spectrometry was optimized or became generally accessible. In addition, reversibly ... -
Intramolekulare Titan-vermittelte Aminocyclopropanierung als Zugang zu N-Benzyl-4-alkyl-2-azabicyclo[3.1.0]hexanen - Synthese von tri- und tetrasubstituierten Alkenen durch Palladium-katalysierte Kreuzkupplung von Alkin-Titan-Komplexen
(2004-11-02)Alkene- and alkadiene-substituted formamides were intramolecularly amino-cyclopropanated. Furthermore, titanium-complexes of unsaturated compounds were cross-coupled with severa bromobenzenes via ... -
Investigation of Polymer-Filler Interactions Using Functionalized Nanoparticles
(2020-03-16)Silica and carbon black (CB) particles were successfully functionalized by exploiting the characteristic features of the reversible addition--fragmentation chain transfer (RAFT) polymerization. This enabled both the ... -
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 ... -
Ion mobility mass spectrometry as a powerful tool to analyze complex macromolecular systems
(2021-02-01)Modern applications of polymers rely on intricately tailored macromolecules exhibiting very specific properties and therefore require extensive analysis. In this context, IMMS is an immensely powerful technique since it ...