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
- Destabilising Effect of Long Range Forces in Thin Liquid Films on Wettable Substrates
- G. Reiter, A. Sharma, A. Casoli, M.-O. David, R. Khanna, P. Auroy. Europhys. Lett. 46, 512 (1999)
- Thin Film Instability Induced by Long Range Forces
- G. Reiter, A. Sharma, A. Casoli, M.O. David, R. Khanna, P. Auroy. Langmuir 15, 2551-2558 (1999)
- Network stretching, slip processes, and fragmentation of crystallites during uniaxial drawing of polyethylene and related copolymers. A comparative study
- R. Hiss, S. Hobeika, C. Lynn, G. Strobl. Macromolecules 32, 4390-4403 (1999)
- Reversible surface melting of PE and PEO crystallites indicated by TMDSC
- W.B. Hu, T. Albrecht, G. Strobl. Macromolecules 32, 7548-7554 (1999)
- A general scheme derived from video-controlled stretching tests and WAXS for describing tensile deformations of polyethylenes
- R. Hiss, S. Hobeika, C. Lynn, G. Strobl. Journal of Macromolecular Science - Physics B38, 847-858 (1999)
- Steps in the transition of an entangled polymer melt to the partially crystalline state
- B. Heck, T. Hugel, M. Iijima, E. Sadiku, G. Strobl. New Journal of Physics 1, 17 (1999).
- Building lamellae from blocks: The pathway followed in the formation of crystallites of syndiotactic polypropylene
- T. Hugel, G. Strobl, R. Thomann. Acta Polymerica, 50, 214 (1999)
- Adhesion Failure and Dewetting of Thin Liquid Films
- A. Sharma, R. Khanna and G. Reiter. Festschrift on Adhesion Science and Technology, p. 199-237, W.J. van Ooij and H.R. Anderson, eds., VSP Publishers, Utrecht (1998)
- Détermination de forces intermoléculaires par microscopie optique: effet de connecteurs polymères
- A.Casoli, G.Reiter, M.Brendlé, J. Schultz. Ouvrage des actes “Imagerie des Polymères” (Colloque international francophone, Nancy, Février 1998, (Apollor)
- Self-assembly of Crystallisable Diblock Copolymers
- G. Reiter, P. Hoerner, G. Hurtrez, G. Riess, J.-U. Sommer, J.-F. Joanny. J. Surf. Sci. Tech. 14 , 93-103 (1998)
- Role of Intermolecular Interactions in Pattern Formation in Unstable Thin Films
- A. Sharma, G. Reiter. Metals Materials and Processes 10, 287-302 (1998)
- The artistic side of intermolecular forces
- G. Reiter. Science 282, 888-889 (1998)
- Structure and dynamics of structure formation in model triarm star block copolymers of polystyrene, poly(ethylene oxide), and poly(epsilon-caprolactone)
- G. Floudas, G. Reiter, O. Lambert, P. Dumas. Macromolecules 31, 7279-7290 (1998)
- Crystallisation of Adsorbed Polymer Monolayers
- G. Reiter, J.-U. Sommer. Phys. Rev. Lett. 80, 3771 (1998)
- Deformation of a Glassy Polymer Film by Long-Range Intermolecular Forces
- M.O. David, G. Reiter, T. Sitthai, J. Schultz. Langmuir 14, 5667-5672 (1998)
- Capillary waves on a poly(vinylacetate) surface studied by off-specular diffuse X-ray scattering
- S. Bauer, G.R. Strobl. Polymer Bulletin 40, 291-296 (1998)
- Superheating effects during the melting of crystallites of syndiotactic polypropylene analysed by temperature-modulated differential scanning calorimetry
- J.E.K. Schawe, G.R. Strobl. Polymer 39, 3745-3751 (1998)
- The role of co-units in polymer crystallization and melting: New insights from studies on syndiotactic poly(propene-co-octene)
- G. Hauser, J. Schmidtke, G. Strobl. Macromolecules 31, 6250-6258 (1998)
- Synthesis and microphase separation of diblock copolymers of styrene and p-chlorostyrene prepared by using N-oxyl capped macroinitiators
- S. Butz, J. Hillermann, G. Schmidt-Naake, J. Kressler, R. Thomann, B. Heck, B. Stühn. Acta Polymerica 49, 693-699 (1998)
- La réflectivité des polymères
- G. Reiter. Chapitre VIII dans les actes de l'ecole française de réflectivité, à Marseille 1997, Eds. A. Gibaud, J. Daillant