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Neueste Veröffentlichungen
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...)
Determining Entanglement Molar Mass of Glassy Polyphenylenes Using Mechanochromic Molecular Springs
Maximilian Raisch, Günter Reiter, Michael Sommer. ACS Macro Lett. 2022, 11, 760–765
Molecular force transduction in tough and glassy poly(meta,meta,para-phenylene) (PmmpP) was investigated as a function of Mn using covalently incorporated mechanochromic donor–acceptor torsional springs based on an ortho-substituted diphenyldiketopyrrolopyrrole (oDPP). Blending oDPP-PmmpP probe chains with long PmmpP matrix chains allowed us to investigate molar-mass-dependent mechanochromic properties for a series of specimens having mechanically identical properties.(mehr...)
The memory of thin polymer films generated by spin coating
Günter Reiter, Farzad Ramezani, Jörg Baschnagel. EPJE 45 (2022) 51
We present results from isothermal and temperature-sweep creep experiments adapted to filaments which were derived from spin coated and subsequently crumpled thin polystyrene films. Due to the existence of residual stresses induced by preparation, the filaments showed significant shrinkage which we followed as a function of time at various temperatures. In addition, the influence of preparation conditions and subsequent annealing of supported thin polymer films on shrinkage and relaxation behavior was investigated. The temporal evolution of shrinkage revealed a sequence of relaxation regimes. (mehr...)
Primary nucleation in metastable solutions of poly(3-hexylthiophene)
Tianyu Wu, Sivasurender Chandran, Yao Zhang, Tianze Zheng, Thomas Pfohl, Jun Xu, Günter Reiter. Macromolecules 55 (2022) 3325–3334
Due to its smallness and low probability of formation, the determination of the size of the critical primary nucleus represents a great challenge in polymer crystallization. We are still missing a feasible approach providing experimental access to primary nucleation. In this work, we investigated the dependence of the incubation time on the degree of supersaturation for a well-defined metastable regime of a prototypical conjugated polymer, i.e., poly(3-hexylthiophene). Based on Kashchiev’s nucleation theorem and verified by a simulation model for primary nucleation based on the kinetics of attaching and detaching crystalline units, we deduced the number of crystalline units within the critical nucleus [mehr...]
Liste der Veröffentlichungen
- Fully Isotactic Poly(p-methylstyrene): Precise Synthesis via Catalytic Polymerization and Crystallization Studies
- Tianyu Wu, Luis Valencia, Thomas Pfohl, Barbara Heck, Günter Reiter, Pierre Lutz, Rolf Mülhaupt. Macromolecules 52 (2019) 4839-4846
- Photoelectronic properties of composite films based on conductive polymer PIDT-BT and single-walled carbon nanotubes
- Andrey N. Aleshin, Baode Zhang, Petr A. Aleshin, Vasily N. Petrov, Irina N. Trapeznikova, Günter Reiter, Janis Kleperis. SN Applied Sciences 1 (2019) 1101
- Segmental Rearrangements Relax Stresses in Nonequilibrated Polymer Films
- Sivasurender Chandran, Günter Reiter. ACS Macro Letters, 8, 646, (2019)
- Thermodynamic Features of Perfectly Crystalline Poly(3-Hexylthiophene) Based on Flory’s Relation
- Mina Alizadehaghdam, Silvia Siegenführ, Farhang Abbasi, and Günter Reiter. Journal of Polymer Science Part B: Polymer Physics 57, 431–437 (2019)
- Thermodynamic Features of Perfectly Crystalline Poly(3-hexylthiophene) Revealed Through Studies of Imperfect Crystals
- Mina Alizadehaghdam, Barbara Heck, Silvia Siegenführ, Farhang Abbasi, and Günter Reiter. Macromolecules 52 (2019) 2487–2494
- A Structural Fibrillation Parameter from Small Angle X-ray Scattering to Quantify Pulp Refining
- Jia Mao, Barbara Heck, Hatem Abushammala, Günter Reiter, and Marie-Pierre Laborie. Cellulose 26 (2019) 4265–4277
- Following isothermal and non-isothermal crystallization of poly(3- hexylthiophene) thin films by UV-vis spectroscopy
- Mina Alizadehaghdam, Barbara Heck, Silvia Siegenführ, Yaser AlShetwi, Fanuel M. Keheze, Sebastian Stäter, Farhang Abbasia, Günter Reiter. Polymer 210 (2020) 122959
- Snails as living 3D printers: free forms for the architecture of tomorrow
- Christoph Allgaier, Benjamin Felbrich, Frederik Wulle, Emna Khechine, James H. Nebelsick, Achim Menges, Günter Reiter, Renate Reiter, Armin Lechler, Alexander Verl, Karl-Heinz Wurst. In Knippers, J; Schmid, U.; Speck, T. (eds.) Biomimetics for Architecture, Birkhäuser, Basel 2019, pp 126-133. (ISBN: 978-3-0356-1791-7)
- Controlling the Growth of Stacks of Correlated Lamellar Crystals of a Block Copolymer
- Sumit Majumder, Renate Reiter, Jun Xu and Günter Reiter. Macromolecules 52 (2019) 9665-9671
- Determination of the Critical Size of Secondary Nuclei on the Lateral Growth Front of Lamellar Polymer Crystals
- Shujing Zhang, Jiarui Han, Yang Gao, Bao-Hua Guo, Günter Reiter, Jun Xu. Macromolecules 52 (2019) 7439-7447
- A Nucleation Mechanism Leading to Stacking of Lamellar Crystals in Polymer Thin Films
- Sumit Majumder, Purushottam Poudel, Hui Zhang, Jun Xu, Günter Reiter. Polymer International 69 (2020) 1058
- Processing Pathways Decide Polymer Properties at the Molecular Level
- S. Chandran, J. Baschnagel, D. Cangialosi, K. Fukao, E. Glynos, L. M. C. Janssen, M. Müller, M. Muthukumar, U. Steiner, J. Xu, S. Napolitano, and G. Reiter. Macromolecules 52 (2019) 7146-7156
- Controlling the Pore Size in Conjugated Polymer Films via Crystallization-Driven Phase Separation
- Shaowen Guo, Changyu Shen, Jingbo Chen, Günter Reiter, Bin Zhang. Soft Matter 15 (2019) 2981-2989
- Adapted Creep Test for the Study of Non-Equilibrated Thin Polymer Films
- Farzad Ramezani. Inaugural-Dissertation zur Erlangung des Doktorgrades der Fakultät für Mathematik und Physik der Albert-Ludwigs-Universität Freiburg 2019
- Tad Pili Play a Dynamic Role in Caulobacter crescentus Surface Colonization
- Matteo Sangermani, Isabelle Hug, Nora Sauter, Thomas Pfohl, Urs Jenala. mBio 10:e01237-19 (2019)
- Spatially resolved small-angle X-ray scattering for characterizing mechanoresponsive liposomes using microfluidics
- Marzia Buscema, Hans Deyhle, Thomas Pfohl, Andreas Zumbuehl, Bert Müller. Materials Today Bio 1 (2019) 100003
- Semicrystalline Non-Isocyanate Polyhydroxyurethanes as Thermoplastics and Thermoplastic Elastomers and Their Use in 3D Printing by Fused Filament Fabrication
- Vitalij Schimpf, Johannes B. Max, Benjamin Stolz, Barbara Heck, and Rolf Mülhaupt. Macromolecules 52 (2019) 320-331
- Self-Assembly of Oligo(phenylene-thiophene)s on Monolayer Graphene: Molecular Dynamics Simulations
- Natalia Borzdun, Victor Nazarychev, Sergey Larin, Guenter Reiter, Sergey Lyulin. J. Phys. Chem. C, 123 (2019) 859–867
- Functional macromolecular systems: kinetic pathways to obtain tailored structures
- V. Abetz, K. Kremer, M. Müller, and G. Reiter. Macromolecular Chemistry and Physics 220 (2019) 1800334
- Growth Kinetics of Stacks of Lamellar Polymer Crystals
- Sumit Majumder, Hanna Busch, Purushottam Poudel, Stefan Mecking, and Günter Reiter. Macromolecules 51 (2018) 8738–8745