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
- Real time determination of the slippage length in autophobic polymer dewetting
- G. Reiter, R. Khanna. Phys. Rev. Lett. 85, 2753-2756 (2000)
- Kinetics of Autophobic Dewetting of Polymer Films
- G. Reiter, R. Khanna. Langmuir 16, 6351-6357 (2000)
- Morphologies of Diblock Copolymer Thin Films Before and After Crystallization
- G. Reiter, G. Castelein, P. Hoerner, G. Riess, J.-U. Sommer, G. Floudas. Eur. Phys. J. E. 2, 319-334 (2000)
- Polymer Crystallization in Quasi-2 Dimensions: II. Kinetic Models and Computer Simulations
- J.-U. Sommer, G. Reiter. J. Chem. Phys. 112, 4384-4393 (2000)
- Polymer Crystallization in Quasi-2 Dimensions: I. Experimental Results
- G. Reiter, J.-U. Sommer. J. Chem. Phys. 112, 4376-4383 (2000)
- Capillary rise in glass fabrics.
- J.M. Senecot, M. Nardin, G. Reiter, J. Schultz, P. Christou, P. Henrat. Le Vide: Science, Technique et Applications 296, 440-445 (2000)
- Etude par microscopie à force atomique de la cristallisation de polymères
- G. Reiter, G. Castelein, J.U. Sommer, L. Vidal. Actes du Forum des Microscopies à Sonde Locale, Marly le Roi, 7-9 mars 2000, p. 68-69
- Block crystallization in model triarm star block copolymers with two crystallizable blocks. A time-resolved SAXS-WAXS study
- G. Floudas, G. Reiter, O. Lambert, P. Dumas, F.J. Yeh, B. Chu. In: Scattering from Polymers: Characterization by X-rays, Neutrons, and Light. ACS Symposium Series 739 (2000) 448-455
- Light scattering by fluctuations within a nematic wetting layer in a isotropic phase of a liquid crystal
- R. Sigel, G. Strobl. Journal of Chemical Physics 112, 1029-1039 (2000)
- Temperature and strain rate independence of critical strains in polyethylene and poly(ethylene-co-vinyl acetate)
- S. Hobeika, Y. Men, G. Strobl. Macromolecules 33, 1827-1833 (2000)
- Investigating the mechanisms of polymer crystallization by SAXS experiments
- G. Hauser, J. Schmidtke, G. Strobl, T. Thurn-Albrecht. ACS Symposium Series 739, 140-151 (2000)
- Static and Dynamic Light Scattering of a Nematic Side-Group Polysiloxane
- Jürgen Schmidtke, Werner Stille, and Gert Strobl. Macromolecules 33, 2922 (2000)
- Isothermal crystallization and melting of isotactic polypropylene analyzed by time- and temperature-dependent small-angle X-ray scattering experiments
- M. Iijima, G. Strobl. Macromolecules 33, 5204-5214 (2000)
- From the melt via mesomorphic and granular crystalline layers to lamellar crystallites: A major route followed in polymer crystallization?
- G. Strobl. Eur. Phys. J. E 3, 165 (2000)
- Steps in the formation of the partially crystalline state
- Barbara Heck, Thosten Hugel, Masanori Iijima, Gert Strobl. Polymer 41, 8839-8848 (2000)
- Polymer Studies
- G. Reiter. Chapter 10 in Lecture Notes in Physics No. 58, X-Ray and Neutron Reflectivity: Principles and Applications, Eds. J. Daillant, A. Gibaud , 1999
- Morphological Pathways of Pattern Evolution and Dewetting in Thin Liquid Films
- A. Sharma, R. Khanna, R. Konnur, G. Reiter. K.L. Mittal, ed., VSP Publishers, Utrecht (1999)
- Nanometer-scale Surface Patterns with Long Range Order Created by Crystallisation of Diblock Copolymers
- G. Reiter, G. Castelein, P. Hoerner, G. Riess, A. Blumen, J.-U. Sommer. Phys. Rev. Lett. 83, 3844-3847 (1999)
- A Thin Film Analog of the Corneal Mucus Layer of the Tear Film: An Enigmatic Long Range Non-Classical DLVO Interaction in the Breakup of Thin Polymer Films
- A. Sharma, R. Khanna, G. Reiter. Colloids & Surfaces B 14, 223-235 (1999)
- The Strength of Long-Range Forces Across Thin Liquid Films
- G. Reiter, A. Sharma, R. Khanna, A. Casoli, M.O. David. J. Coll. Interf. Sci. 214, 126 (1999)