Publications
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Recent Publications
Valentina Pirela, Leire Unanue, Justine Elgoyhen, Javier Ramos, Juan Francisco Vega, Agurtzane Mugica, Manuela Zubitur, Cuong Minh Quoc Le, Abraham Chemtob, Radmila Tomovska, Günter Reiter, Jaime Martín, Alejandro J. Müller. European Polymer Journal (2025) 113721
This work studies how the chemical structure of relatively similar high-sulfur alternating polythioether homopolymers (DMDS-alt-DVE, DMDS-alt-TEGDVE, and DMDS-alt-BDDVE) affects their structural properties, morphology, polymorphism, and crystallization kinetics. Differential scanning calorimetry (DSC) and polarized light optical microscopy (PLOM) experiments revealed a complex crystallization for the samples in which up to three different polymorphic phases were identified: a very low melting crystal form (VL-Tm form), a low melting crystal form (L-Tm form) and a high melting crystal form (H-Tm form), characterized by their corresponding melting temperature ranges and confirmed via Wide-Angle X-ray Scattering (WAXS). A coexistence of negative and positive spherulites was found, and their origin was revealed by atomic force microscopy (AFM), which showed how the lamellar arrangement varied in the samples from predominantly radial to a cross-hatched morphology. (more...)
Gabriele Greco, Benjamin Schmuck, Fredrik G. Bäcklund, Günter Reiter and Anna Rising. ACS Appl. Polym. Mater. 6 (2024) 14342–14350
Recent biotechnological advancements in protein production and development of biomimetic spinning procedures make artificial spider silk a promising alternative to petroleum-based fibers. To enhance the competitiveness of artificial silk in terms of mechanical properties, refining the spinning techniques is imperative. One potential strategy involves the integration of post-spin stretching, known to improve fiber strength and stiffness while potentially offering additional advantages. Here, we demonstrate that post-spin stretching not only enhances the mechanical properties of artificial silk fibers but also restores a higher and more uniform alignment of the protein chains, leading to a higher fiber toughness. (more...)
Raphael Hertel, Maximilian Raisch, Michael Walter, Günter Reiter, Michael Sommer. Angew. Chem. Int. Ed. 2024, e202409369
Sterically distorted donor-acceptor p‑systems, termed DA springs, can be progressively planarized under mechanical load causing a bathochromic shift of the photoluminescence (PL) spectrum. By combining theory and experiment, we here use a simple linear force calibration for two different conformational mechanochromophores to determine molecular forces in polymers from the mechanochromic shift in PL wavelength during multiple uniaxial tensile tests. Two systems are used, i) a highly entangled linear glassy polyphenylene and ii) a covalent elastomeric polydimethylsiloxane network. The mean forces estimated by this method are validated using known threshold forces for the mechanochemical ring-opening reactions of two different spiropyran force probes. The agreement between both approaches underlines that these DA springs provide the unique opportunity for the online monitoring of local molecular forces present in diverse polymer matrices.(more...)
List of Publications
- Effect of chemical structure on the crystallization kinetics of triple polymorphic high-sulfur-content polythioethers
- Valentina Pirela, Leire Unanue, Justine Elgoyhen, Javier Ramos, Juan Francisco Vega, Agurtzane Mugica, Manuela Zubitur, Cuong Minh Quoc Le, Abraham Chemtob, Radmila Tomovska, Günter Reiter, Jaime Martín, Alejandro J. Müller. European Polymer Journal (2025) 113721
- Hydro-elastic interactions for shaping hydrodynamic properties in microfluidic flows
- Claas-Hendrik Stamp, Inauguraldissertation der Fakultät für Mathematik und Physik, 2024
- Post-spin Stretch Improves Mechanical Properties, Reduces Necking, and Reverts Effects of Aging in Biomimetic Artificial Spider Silk Fibers
- Gabriele Greco, Benjamin Schmuck, Fredrik G. Bäcklund, Günter Reiter and Anna Rising. ACS Appl. Polym. Mater. 6 (2024) 14342–14350
- Mechanistically Different Mechanochromophores Enable Calibration and Validation of Molecular Forces in Glassy Polymers and Elastomeric Networks
- Raphael Hertel, Maximilian Raisch, Michael Walter, Günter Reiter, Michael Sommer. Angew. Chem. Int. Ed. 2024, e202409369
- Mechanism for the formation of millimeter-long solid filaments by spin coating dilute solutions of a crystallizable polymer
- Da Huang, Thorsten Hugel, Günter Reiter. Macromolecules 57 (2024) 3696–3705
- Competing influences of cooling rate and diluent concentration on crystallization of poly(3-hexylthiophene)
- Mina Alizadehaghdam, Farhang Abbasi, Günter Reiter. J. Phys. Chem. C 128 (2024) 4757–4765
- “Printing” on Polymer Single Crystals through Microregional Heating
- Tianyu Wu, Haimu Ye, Xinyi Pan, Yaning He, Jun Xu, Günter Reiter. ACS Appl. Polym. Mater. 2024, 6, 14, 7969–7977
- Identifying a Mesomorphic Boundary Zone within Polybutene-1 Single Crystals Emerging during a Crystal-Crystal Transformation
- Jinlong Chen, Binghua Wang, Changyu Shen, Jingbo Chen, Günter Reiter, Bin Zhang. Macromolecules 56 (2023) 5050–5057
- Determining the maximum melting temperature of polymer crystals from a change in morphology of dewetting rims
- Gang Wang, Guotao Shi, Anchenyi Yang, Binghua Wang, Changyu Shen, Jingbo Chen, Günter Reiter, Bin Zhang. Polymer 274 (2023) 125874
- Unraveling the complex polymorphic crystallization behavior of the alternating copolymer DMDS-alt-DVE
- Valentina Pirela, Justine Elgoyhen, Radmila Tomovska, Jaime Martin Perez, Cuong Minh Quoc Le, Abraham Chemtob, Brahim Bessif, Barbara Heck, Günter Reiter, and Alejandro Müller. ACS Appl. Polym. Mater. 5 (2023) 5260–5269
- Nucleation Assisted through the Memory of a Polymer Melt: A Different Polymorph Emerging from the Melt of another One
- 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
- Tuning the hydraulic resistance by swelling-induced buckling of membranes in high-aspect-ratio microfluidic devices
- Claas-Hendrik Stamp, Binyam Solomon, Friederike Lang, Efstathios Mitropoulos and Thomas Pfohl. Lab Chip 23 (2023) 3662-3670
- Reversible Dehydration-Hydration of Poly(ethylene glycol) in Langmuir Monolayers of a Diblock Copolymer Inferred from Changes in Filament Curvature
- Emna Khechine, Sebastian Noack, Helmut Schlaad, Jun Xu, Günter Reiter, Renate Reiter. Langmuir 39 (2023) 2710–2718
- Improving the order of crystalline regions of poly(3-hexylthiophene) by crystallization from the self-nucleation domains
- Mina Alizadehaghdam, Farhang Abbasia, and Günter Reiter. Thermochimica Acta 717 (2022) 179352
- Determining Entanglement Molar Mass of Glassy Polyphenylenes Using Mechanochromic Molecular Springs
- Maximilian Raisch, Günter Reiter, Michael Sommer. ACS Macro Lett. 11, 760–765, 2022
- Editorial on the Special Topic “Polymer Crystallization”
- Jun Xu, Günter Reiter, and Rufina G. Alamo. Crystals 12, 618 (2022)
- 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
- The memory of thin polymer films generated by spin coating
- Günter Reiter, Farzad Ramezani, Jörg Baschnagel. EPJE 45 (2022) 51
- Bacteria-on-a-bead: probing the hydrodynamic interplay of dynamic cell appendages during cell separation
- Nora Sauter, Matteo Sangermani, Isabelle Hug, Urs Jenal, and Thomas Pfohl. Biology Communications 5 (2022) 1093
- Crystallization of copolymers: formation of alternating periodic structures and concepts for their modification
- Brahim Bessif. Inaugural-Dissertation der Fakultät für Mathematik und Physik, 2022