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Neueste Veröffentlichungen
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...)
Liste der Veröffentlichungen
- Morphological Instabilities of Polymer Crystals
- Nikolay Grozev, Ioan Botiz, Günter Reiter. Eur. Phys. J. E 27, 63-71 (2008)
- Crystal nucleation enhanced at the diffusive interface of immiscible polymer blends
- Yu Ma, Liyun Zha, Wenbing Hu, Günter Reiter, Charles C. Han. Phys. Rev. E 77, 061801 (2008)
- Semicrystalline Macromolecular Design by Nitroxide-Mediated Polymerization
- Khaled Karaky, Gérald Clisson, Günter Reiter, Laurent Billon. Macromol. Chem. Phys. 209, 715–722 (2008)
- Viscoelastic Thin Polymer Films under Transient Residual Stresses: Two-Stage Dewetting on Soft Substrates
- S. Al Akhrass, G. Reiter, S.Y. Hou, M. H. Yang, Y. L. Chang, F. C. Chang, C. F. Wang, A. C.-M. Yang. Phys. Rev. Lett. 100, 178301 (2008)
- The Influence of Protic Non-Solvents Present in the Environment on Structure Formation of Poly(γ-benzyl-L-glutamate) in Organic Solvents
- Ioan Botiz, Nikolay Grozev, Helmut Schlaad, Günter Reiter. Soft Matter, 4, 993-1002 (2008)
- Influence of Progressive Cross-Linking on Dewetting of Polystyrene Thin Films
- Samer Al Akhrass, Roxana-Viorela Ostaci, Yves Grohens, Eric Drockenmuller, Günter Reiter. Langmuir 24, 1884-1890 (2008)
- Tuning the surface/bulk properties by the control of the amphiphilic profile in gradient copolymer
- K. Karaky, C. Derail, G. Reiter, et al. Conference Information: 46th Microsymposium on Macromolecules - Nanostructured Polymers and Polymer Nanocomposites, Jul.08 - Aug.12, 2007 Prague, Czech Republic, Macromolecular Symposia 267, 31-40 (2008)
- Characterizing and modeling the tensile deformation of polyethylene: The temperature and crystallinity dependences
- Ke Hong, Gert Strobl. Polymer Science Series A 50, 483-493 (2008)
- Zero Growth Temperature of Crystallizing Polyethylene
- T. Y. Cho, W. Stille, G. Strobl. Macromolecules 40, 2596 (2007)
- Zero growth temperature and growth kinetics of crystallizing poly(ε-caprolactone)
- T.-Y. Cho, W. Stille, G. Strobl. Colloid Polym. Sci. 285, 931 (2007)
- Progress in Understanding Polymer Crystallization
- Editors: Günter Reiter and Gert Strobl. Lecture Notes in Physics 714 (2007), Springer Berlin/Heidelberg ISSN: 978-3-540-47305-3
- Formation of low-dimensional close-packed arrays of nanoparticles in a dewetting water layer
- Leonid V. Govor, Günter Reiter, Gottfried H. Bauer, Jürgen Parisi. Phys. Rev. E 76, 041609 (2007)
- Thin Film Morphology in Triblock Terpolymers with One and Two Crystallizable Blocks
- Adriana Boschetti-de-Fierro, Lea Spindler, Günter Reiter, Dania Olmos, Sergei Magonov, Volker Abetz. Macromolecules 40, 5487-5496 (2007)
- Stable dispersions of highly anisotropic nanoparticles formed by cocrystallization of enantiomeric diblock copolymers
- D. Portinha, F. Boue, L. Bouteiller, G. Carrot, C. Chassenieux, S. Pensec, G. Reiter. Macromolecules 40, 4037- 4042 (2007)
- Cooperative Rearrangements Leading to Long Range Order in Monolayers of Supramolecular Polymers
- F. Vonau, D. Aubel, L. Bouteiller, G. Reiter, L. Simon. Phys. Rev. Lett. 99, 086103 (2007)
- Relaxation of Residual Stress and Reentanglement of Polymers in Spin-Coated Films
- Pascal Damman, Sylvain Gabriele, Séverine Coppée, Sylvain Desprez, Didier Villers, Thomas Vilmin, Elie Raphaël, Moustafa Hamieh, Samer Al Akhrass, Günter Reiter. Phys. Rev. Lett. 99, 036101 (2007)
- Switching layer stability in a polymer bilayer by thickness variation
- J. P. de Silva, M. Geoghegan, A. M. Higgins, G. Krausch, M.-O. David, G. Reiter. Phys. Rev. Lett. 98, 267802 (2007)
- Avantages de la réflectometrie des neutrons pour l’étude des polymères en couches minces
- Günter Reiter, Mark Geoghegan. Collection SFN 8, 103-113 (2007)
- Morphologies of Polymer Crystals in Thin Films
- Günter Reiter, Ioan Botiz, Laetitia Graveleau, Nikolay Grozev, Krystyna Albrecht, Ahmed Mourran, Martin Möller. In "Progress in Understanding Polymer Crystallization". Eds. Günter Reiter and Gert Strobl, Lect. Notes Phys. 714, 179-200 (2007)
- Influence of Substrate Properties on the Dewetting Dynamics of Viscoelastic Polymer Films
- Moustafa Hamieh, Samer Al Akhrass, Tayssir Hamieh, Pascal Damman, Sylvain Gabriele, Thomas Vilmin, Elie Raphaël, Günter Reiter. J. Adhes. 83, 367-381 (2007)