Veranstaltungen 2019
Di, 17.12.2019
17:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
Prof. Dr. Ulrich Wiesner
Materials Science & Engineering Department, Cornell University, Ithaca, USA
"Structure formation and function via molecules at organic-inorganic nanomaterial interfaces"
Abstract:
Interfaces play a crucial role both in fundamental structure formation processes as well as function and properties of organic-inorganic composite nanomaterials. This talk will provide an overview of the chemistry and physics of such functional nanohybrids based on organic molecule self-assembly phenomena of low molar mass surfactants as well as macromolecular block copolymers. [...]
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Wiesner_17122019.pdf
(539,2 KB) vom 15.08.2019
Di, 03.12.2019
17:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
Prof. Dr. Michael Vogel
Institut für Festkörperphysik, Technische Universität Darmstadt
"From local to diffusive dynamics in ionic liquids and polymer electrolytes: NMR studies across time and length scales"
Abstract:
The properties of liquid mixtures crucially depend on dynamical couplings of the components on various time and length scales. We exploit the capabilities of multi-nuclear and multi-method NMR approaches to investigate this interplay for two classes of materials with high technological relevance: ionic liquids and polymer electrolytes. [...]
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Vogel_031219.pdf
(467,6 KB) vom 15.10.2019
Di, 19.11.2019
17:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
Prof. Dr. Pol Besenius
Johannes Gutenberg-University Mainz, Institute of Organic Chemistry, Mainz, Germany
"Multidomain Peptide Assemblies for the Design of Thermoresponsive
Supramolecular Materials"
Abstract:
Spatial and temporal control are critical properties to advance and optimize functional macromolecular materials in order to mimic key features of living systems. In my lecture, I will discuss our methodology in developing non-equilibrium states in thermoresponsive hydrogels using peptide-polymer conjugates. [...]
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Besenius_1911019.pdf
(1,4 MB) vom 05.11.2019
Di, 05.11.2019
17:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
Prof. Dr. Stefan Mecking
Chemical Materials Science, Department of Chemistry, University of Konstanz, Germany
"Materials based on confined and polyethylene-like crystallization"
Abstract:
Advanced catalytic methods provide unconventional polyethylenes, like disentangled UHMWPE or plant-oil based polyethylene-like polymers with dilute main-chain functional groups. These are of interest to achieve desirable materials properties, including a non-persistent nature.
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Mecking_0511019.pdf
(466,2 KB) vom 05.07.2019
Di, 29.10.2019
17:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
Prof. Dr. Ralph Colby
Department of Materials Science and Engineering, Pennsylvania State University, USA
“Liquid Crystal Mesophases in Conjugated Polymers for Flexible Electronics"
Abstract:
A correlation of glass transition temperature with the molecular structure of conjugated polymers is presented that enables prediction of the structures needed to keep Tg well below ambient temperature for flexible electronics. Many of the highest mobility polymers have interesting LC mesophases that may enable more pi-stacking for superior intermolecular transport. [...]
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Colby_29102019.pdf
(468,4 KB) vom 20.05.2019
Mo, 14.10.2019 - Sondertermin!
17:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
Prof. Dr. Shi-Qing Wang
Department of Polymer Science, University of Akron, USA
“Ductility of glassy semicrystalline polymers"
Abstract:
Commodity polymers, the very majority of all polymer productions, are a key class of modern materials, due to their high specific strength. Thus, it is a central task in polymer science and engineering to study how to acquire adequate mechanical properties and improve the mechanical performance. As strong solid materials, polymers need to be either glassy or crystalline with a significant level of crystallinity. [...]
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Wang_14102019.pdf
(471,5 KB) vom 19.08.2019
Di, 02.07.2019
17:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
Dr. Kostas Daoulas
Max Planck Institute for Polymer Research, Mainz
“Investigating partially-ordered mesophases of semiconducting polymers with mesoscopic models"
Abstract:
The rich phase behavior of soluble semiconducting polymers makes them interesting for basic polymer physics, allowing one to access partially-ordered states ─ microstructures located on the order-disorder scale between the two extremities set by (poly)crystalline and amorphous morphologies. Studying microstructures with varying degree of order can facilitate, e.g. understanding of polymer crystallization phenomena. [...]
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Daoulas_02072019.pdf
(502 KB) vom 06.05.2019
Di, 21.05.2019
17:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
Prof. Viktor Ivanov
Institut für Physik, Naturwissenschaftliche Fakultät II,
Martin-Luther-Universtität Halle-Wittenberg
“Phase behavior of semiflexible polymers: Monte Carlo computer simulation"
Abstract:
In this talk, I will give an overview about research in my group on phase behavior of semiflexible polymers. First, I will consider pseudo-phase diagrams of single semiflexible homopolymer chains and flexible-semiflexible copolymer chains, both in the bulk solution and at an adsorbing surface. [...]
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Ivanov_21052019.pdf
(467,2 KB) vom 11.04.2019
Di, 07.05.2019
17:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
Prof. Kazuya Saito
Department of Chemistry, Faculty of Pure and Applied Science, University of Tsukuba, Tsukuba, Japan
"Quasi-Binary Picture of Thermotropics: Experimental Basis and Its Outcomes"
Abstract:
Molecules of most thermotropic liquid crystals are not highly anisotropic as widely assumed but consist of hard core and flexible alkyl chain(s). We discuss the effect of this molecular structure on the understanding of thermotropic liquid crystals. Through analyzing the entropy of transitions, the molten state of chains comparable to n-alkanes is established in any liquid crystalline phases. [...]
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Saito_07052019.pdf
(468,3 KB) vom 25.04.2019
Di, 30.04.2019
17:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
Prof. Dr. Mark P. Taylor
Department of Physics, Hiram College, USA
"Folding of a model biopolymer in a crowded environment"
Abstract:
At the molecular level, biological systems operate in very crowded solution environments. It has long been recognized that this crowding can affect the conformational stability and phase transitions of the biopolymers comprising such systems. Similar issues must be addressed in developing biotechnology applications based of dense arrays of surface-tethered polymers. [...]
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Taylor_30042019.pdf
(473,7 KB) vom 22.03.2019
Di, 16.04.2019
17:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
Prof. Jutta Luettmer-Strathmann
Departments of Physics and Chemistry, University of Akron, Ohio, USA
“Configurational contribution to the Soret effect of proteins and ligands - An investigation with density-of-states simulations"
Abstract:
Many of the biological functions of proteins are closely associated with their ability to bind ligands and change conformations in response to changing conditions. Since binding state and conformation of a protein affect its response to a temperature gradient, they may be probed with thermophoresis. In recent years, thermophoretic techniques to investigate biomolecular interactions, quantify ligand binding, and probe conformational changes have become established. [...]
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Luettmer-Strathmann_16042019.pdf
(468,4 KB) vom 21.03.2019
Di, 19.02.2019
17:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
Prof. Guilhem Baeza
Institut National des Sciences Appliquées de Lyon, France
“Isostructural Softening of the Filler Network in SBR/Silica Nanocomposites"
Abstract:
A new formulation of the widely used nanocomposites based on SBR and fractal silica fillers is proposed by substituting the usual covering and coupling agents with short chains (4 kg.mol-1) of polypropylene glycol (PPG) oligomers. We study in a systematic way the structural evolution as well as the changes in linear and non-linear mechanical properties of two series of samples varying: (i) the silica volume fraction in PPG-free samples, and (ii) the amount of PPG for a given silica content of 15 vol.%. [...]
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Baeza_PMS_19_19_2019.pdf
(472,7 KB) vom 04.02.2019
Di, 08.01.2019
17:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
Prof. Kay Saalwächter
Institut für Physik, Naturwissenschaftliche Fakultät II,
Martin-Luther-Universtität Halle-Wittenberg, Halle (Saale)
“Polymer materials: more than just plastics"
Abstract:
With packaging applications being the most tangible and often debated ones, materials based upon synthetic polymers are found virtually anywhere around us - with properties and uses that could not vary more widely. This presentation, aimed in particular at early-stage students, gives some account of the long history of polymer development and use, focusing on an introduction into the main classes of polymer materials. Some specific developments, which sometimes ran parallel in Europe and the US, and took place despite of as well as because of the upheavals in the first half of the 20th century, will be highlighted.
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Saalwächter_PMS_08012019.pdf
(143,4 KB) vom 23.10.2018