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Neueste Veröffentlichungen
Brahim Bessif, Barbara Heck, Thomas Pfohl, Cuong Minh Quoc Le, Abraham Chemtob, Valentina Pirela, Justine Elgoyhen, Radmila Tomovska, Alejandro Müller, Günter Reiter. Macromolecules 56 (2023) 1461–1470
We present investigations of the intricate crystallization and melting behavior of an alternating copolymer synthesized by photopolymerization of 2,2’dimercaptodiethyl sulfide (DMDS) with di(ethylene glycol)divinyl ether (DVE). Upon increasing temperature, we observed the succession of two distinctly separated melting processes, which we related to the sequential formation and disappearance of two crystalline polymorphs. Due to their well separated melting temperatures and, we labelled these polymorphs as LOW--form and HIGH--form, respectively. X-ray diffraction results confirmed differences in the parameters of the crystal unit cells. (more...)
Emna Khechine, Sebastian Noack, Helmut Schlaad, Jun Xu, Günter Reiter, Renate Reiter. Langmuir 39 (2023) 2710–2718
We investigated changes in the hydration state of poly(ethylene glycol) through morphological changes in Langmuir monolayers of a poly(ethylene glycol)-poly(L-lactide) (PEG-b-PLLA) diblock copolymer. When the PEG blocks were hydrated, we observed a remarkable morphology of bundles of ring-like filaments, arranged concentrically, yielding densely packed disk-like objects with a hollow centre. We attribute the uniform curvature of these filaments to a strong mismatch between the molecular volumes occupied by PLLA blocks and hydrated PEG blocks, respectively. (more...)
In situ dissolution and swelling of confined lamellar polymer crystals through exposure to humid air
Brahim Bessif, Thomas Pfohl, Barbara Heck, Yaser Alshetwi, Emna Khechine, Jun Xu, and Günter Reiter. Macromolecules 55, 6015–6022, 2022
Induced by exposure to humid air, we observed in-situ the temporal and spatial changes in thickness and morphology of sandwich-like polymer platelets of a block copolymer. These micron-size platelets consisted of a crystalline poly(ethylene oxide) (PEO) lamella confined between two glassy poly(styrene) (PS) layers, formed via crystallization of a hydrophobic-hydrophilic PS-b-PEO diblock copolymer. We observed first the dissolution of the confined crystalline PEO layers characterized by sharp dissolution front propagating at a constant velocity as described by case II diffusion of a liquid into a solid. (mehr...)
Liste der Veröffentlichungen
- Stabilization of nuclei of lamellar polymer crystals: Insights from a comparison of the Hoffman-Weeks line with the crystallization line
- Jun Xu, Barbara Heck, Hai-Mu Ye, Jing Jiang, Yi-Ren Tang, Jin Liu, Bao-Hua Guo, Renate Reiter, Dongshan Zhou, Günter Reiter. Macromolecules 49 (2016) 2206–2215
- Role of Preparation Pathways and Tacticity on the Non-Equilibrium Dynamcis of Polystyrene Films
- Rishab Handa. Master Thesis im Studiengang M.Sc. Sustainable Materials, 2016
- Variation of the contact resistance with electric current for gold electrodes on a squaraine single crystal
- Leonid Govor, Guenter Reiter, and Jurgen Parisi. Phys. Status Solidi A 212 (2015) 2738–2746, DOI 10.1002/pssa.201532241
- Simulation of secondary nucleation of polymer crystallization via a model of microscopic kinetics
- Kun-Lun Xu, Bao-Hua Guo, Renate Reiter, Günter Reiter, Jun Xu. Chinese Chemical Letters 26, 1105–1108 (2015) / DOI: 10.1016/j.cclet.2015.06.002
- From holes to drops to toroids: Conditions for the transcription of surface patterns into three-dimensional morphologies via rim instabilities in the course of dewetting
- Samer Al Akhrass, Laurent Vonna and Günter Reiter. In: Polymer Surfaces in Motion: Unconventional Patterning Methods, Eds. Juan Rodriguez-Hernandez and Carlos Drummond. Springer 2015
- Tuning Morphologies of Langmuir Polymer Films Through Controlled Relaxations of Non-Equilibrium States
- Sivasurender Chandran, Stefanie Dold, Amaury Buvignier, Kai-Steffen Krannig, Helmut Schlaad, Günter Reiter, and Renate Reiter. Langmuir 2015, 31, 6426−6435. DOI: 10.1021/acs.langmuir.5b01212
- High Temperature Stability of Dewetting-Induced Thin Polyethylene Filaments
- Bin Zhang, Jingbo Chen, Paul Freyberg, Renate Reiter, Rolf Mülhaupt, Jun Xu, Günter Reiter. Macromolecules 48, 1518–1523 (2015)
- Triangular dewetting by symmetry breaking in blends of stiff and flexible polymers
- Paul Freyberg. Inaugural-Dissertation zur Erlangung des Doktorgrades der Fakultät für Mathematik und Physik der Albert-Ludwigs-Universität Freiburg, 2015
- Conductive atomic force microscopy measurements on organic nanocrystals
- Sven Renkert. Master Thesis, Fakultät für Mathematik und Physik der Albert-Ludwigs-Universität Freiburg, 2014
- The influence of the additive composition on degradation induced changes in poly(ethylene-co-vinyl acetate) during photochemical aging
- Angelika Beinert, Cornelia Peike, Ines Dürr, Michael D. Kempe, Günter Reiter, Karl-Anders Weiß. 29th European PV Solar Energy Conference and Exhibition, 22-26 Sept. 2014, Amsterdam, The Netherlands
- Wie kristallisieren Polymere?
- Gert Strobl. Physik Journal 13, 47-50 (2014)
- The Crucial Role of Cadmium Acetate-Induced Conformational Restriction in Microscopic Structure and Stability of Polystyrene-block-Polyvinyl pyridine Thin Films
- Feifei Xue, Hongfei Li, Jichun You, Conghua Lu, Günter Reiter, Shichun Jiang. Polymer 55, 5801-5810 (2014)
- Molecular Weight Dependent Changes in Morphology of Solution Grown Polyethylene Single Crystals
- Bin Zhang, Jingbo Chen, Moritz C. Baier, Stefan Mecking, Renate Reiter, Rolf Mülhaupt, Günter Reiter. Macrom. Rapid Comm. 36, 181-189 (2015)
- Annealing-Induced Periodic Patterns in Solution Grown Polymer Single Crystals
- Bin Zhang, Jingbo Chen, Hui Zhang, Moritz C. Baier, Stefan Mecking, Renate Reiter, Rolf Mülhaupt, Günter Reiter, RSC Advances 5, 12974 (2015)
- Anisotropic Photophysical Properties of Highly Aligned Crystalline Structures of a Bulky Substituted Poly(thiophene)
- Yingying Wang, Barbara Heck, Daniel Schiefer, John O. Agumba, Michael Sommer, Tao Wen, and Günter Reiter. ACSMacroLett. 3, 881-885 (2014)
- Cellulose nanocrystals’ production in near theoretical yields by 1-butyl-3-methylimidazolium hydrogen sulfate ([Bmim]HSO4) – mediated hydrolysis
- Jia Mao, Barbara Heck, Günter Reiter, Marie-Pierre Laborie. Carbohydrate Polymers 117, 443–451 (2015)
- Correlating polymer crystals via self-induced nucleation
- Hui Zhang, Muhuo Yu, Bin Zhang, Renate Reiter, Maximilian Vielhauer, Rolf Mülhaupt, Jun Xu, Günter Reiter. PhysRevLett 112, 237801 (2014)
- Nickel Catalyst with a Hybrid P, N Ligand for Kumada Catalyst Transfer Polycondensation of Sterically Hindered Thiophenes
- Daniel Schiefer, Tao Wen, Yingying Wang, Pierre Goursot, Hartmut Komber, Ralf Hanselmann, Pierre Braunstein, Günter Reiter, Michael Sommer. ACSMacroLett. 3, 617-621 (2014)
- Tunneling Spectroscopy Measurements on Hydrogen-Bonded Supramolecular Polymers
- François Vonau, Dominique Aubel, Laurent Bouteiller, Roozbeh Shokri, Günter Reiter, Olga Guskova, Laurent Simon. Nanoscale 6, 8250 (2014)
- Pattern Formation on Single Crystals of Isotatic Polystyrene in Thin Films
- Hui Zhang. Inaugural-Dissertation zur Erlangung des Doktorgrades der Fakultät für Mathematik und Physik der Albert-Ludwigs-Universität Freiburg, 2014