Browsing Fakultät für Chemie (inkl. GAUSS) by Referee "Vana, Philipp Prof. Dr."
Now showing items 21-40 of 57
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Tuning Mesoporous Silica Structures via RAFT Polymers: From Multiblock Copolymers as new Templates to Surface Modification
(2018-03-06)In this work, new procedures to tailor mesoporous silica thin films are presented. On the one hand, linear multiblock copolymers were utilized as structure directing agents for the synthesis of mesoporous silica thin films. ... -
Conformational spectroscopy of flexible chain molecules near the folding limit
(2018-02-22)The highly competitive conformational landscapes of flexible chain molecules are a difficult challenge even for modern quantum chemistry as several delicate effects, partially counterbalancing each other, play an important ... -
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 ... -
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 ... -
High-Precision Particle Arrangement in Gold‒Polymer-Nanocomposites using RAFT Polymerization
(2016-11-17)This thesis provides a comprehensive analysis of the scientific background on nanocomposites generated via reversible-deactivation radical polymerization (RDRP) techniques. Starting from this basis, nanocomposites with the ... -
Designstrategien für photoschaltbare Polymer-Nanokomposite
(2016-11-17)Silica and gold nanoparticles were functionalized with a developed photo responsive polymer in order to construct tailored self-assembled architectures from polymer nanocopmosites. Silica surfaces were functionalized with ... -
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 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 ... -
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 ... -
Der Einfluss von Defekten auf das Schaltverhalten ferroelektrisch modulierter Substanzen
(2016-04-26)The influence of defects on the phase transition behavior of A2BX4-compounds was studied by diffraction methods, impedance spectroscopy and atomic force microscopy. It was found that chemical point defects have a strong ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
Mechanism and Kinetics of Catalyzed Chain Growth
(2015-02-05)In this work, the activation and polymerization mechanism of Catalyzed Chain Growth (CCG) polymerization of ethylene and styrene was studied. On the basis of two metallocene catalysts (Cp*2ZrCl2 and Cp*2NdCl2Li(OEt2)2) and ... -
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 ... -
Binuclear late transition metal complexes with pyrazole based compartmental ligands: Scaffolds for cooperative organometallic transformations
(2014-10-10)A series of pyrazolate based ligands with 3,5-substituted side arms on the heterocycle have been established as valuable synthons for the preparation of highly compartmentalized bi- and oligonuclear metal complexes. Homo- ... -
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 ...