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Neueste Veröffentlichungen
Claas-Hendrik Stamp, Binyam Solomon, Friederike Lang, Efstathios Mitropoulos and Thomas Pfohl.
Lab Chip 23 (2023) 3662-3670
Controlling fluid flow in microfluidic devices and adapting it to varying conditions by selectively regulating hydrodynamic properties is of critical importance, as the field of microfluidics faces increasingly complex challenges in its wide range of applications. One way to manipulate flows in microfluidic devices is to introduce elastic elements that can be actively or passively deformed. In this work, we developed a membrane-based microfluidic device that allows us to study the deformation of swollen thin membranes as a function of the volume fractions in binary mixtures – here isopropanol and water. (more...)
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
A complex crystallization behavior was observed for the alternating copolymer DMDS-alt-DVE synthesized via thiol–ene step-growth polymerization. Understanding the underlying complex crystallization processes of such innovative polythioethers is critical for their application, for example, in polymer coating technologies. These alternating copolymers have polymorphic traits, resulting in different phases that may display distinct crystalline structures. The copolymer DMDS-alt-DVE was studied in an earlier work, where only two crystalline phases were reported: a low melting, L – Tm, and high melting, H – Tm phase. Remarkably, the H – Tm form was only achieved by the previous formation and melting of the L – Tm form. We applied calorimetric techniques encompassing seven orders of magnitude in scanning rates to further explore this complex polymorphic behavior. (more...)
Transparent, thermoplastic, aliphatic polyesters through crystallization under molecular confinement
Maziar Matloubi, Melika Sarem, Barbara Heck, Günter Reiter, and V. Prasad Shastri. Matter 6 (2023) 3057-3074
In semi-crystalline biodegradable polymers, uncontrolled evolution of crystallinity impacts processing and bulk properties, limiting their application. Through molecular confinement of low-molecular-weight poly(L-lactic acid) (PLLA) segments by polysiloxane blocks and processing at far-from-equilibrium conditions, PLLA crystallization into lamellae of a few nm in thickness with coherence lengths below 100 nm was achieved, thus giving access to films that are optically transparent for over 5 years, possess high Young’s modulus and elongation at break, undergo controlled degradation, and support functional endothelialization. The films possess a nanophase segregated bulk morphology with a hydrophobic siloxane-dominated surface that can be pressure bonded following cold oxygen plasma activation and low-temperature glassy PLLA domains interspersed by nanoscale crystalline physical crosslinks that enable glass transition temperature-triggered shape change. The segmented thermoplastic polyesters (STEPs) can additionally be processed using melt-extrusion printing into 3D objects, thus opening potential application opportunities in the fabrication of implantable/degradable electronics, smart textiles, and packaging. (more...)
Liste der Veröffentlichungen
- Network swelling competing with translational entropy in autophobic polymer dewetting
- W. Beziel, G. Reiter, E. Drockenmuller, R.-V. Ostaci, S. Al Akhrass, F. Cousin, M. Sferrazza. Europhysics Letters 90, 26008 (2010)
- Processes of Ordered Structure Formation in Polypeptide Thin Film Solutions
- Ioan Botiz, Helmut Schlaad, Günter Reiter. Adv. in Polymer Science, 242 (2011) 117-149
- Multi-curvature liquid meniscus in a nanochannel: Evidence of interplay between intermolecular and surface forces
- Pilnam Kim, Ho-Young Kim, Jae Kwan Kim, Günter Reiter, Kahp Y. Suh. Lab Chip 9, 3255-3260 (2009)
- Self-assembled patterns from evaporating layered fluids
- L. V. Govor, J. Parisi, G. H. Bauer, G. Reiter. Journal of Physics - Condensed Matter 21, 264015 (2009)
- Dewetting as an investigative tool for studying properties of thin polymer films
- Günter Reiter, Samer Al Akhrass, Moustafa Hamieh, Pascal Damman, Sylvain Gabriele, Thomas Vilmin, Elie Raphaël. Eur. Phys. J. - Special Topics 166, 165-172 (2009)
- Characterizing and modeling the non-linear viscoelastic tensile deformation of a glass fiber reinforced polypropylene
- J. Fritsch, S. Hiermaier, G. Strobl. Composites Science and Technology 69, 2460-2466 (2009)
- Colloqium: Laws controlling crystallization and melting in bulk polymers
- G. Strobl. Rev. Mod. Phys. 81, 1287-1300 (2009)
- Deformation of cholesteric elastomers by uniaxial stress along the helix axis
- Werner Stille. Eur. Phys. J. E 28, 57-71 (2009)
- 高分子物理学: 理解其结构和性质的基本概念
- 作者:(德国)G.斯特罗伯 译者:胡文兵 蒋世春 门永峰 北京:科学出版社 2009, ISBN 978-7-03-022441-5
- Metastable Untwisted States in Cholesteric Elastomers
- Werner Stille. Macromolecules 42, 7979-7981 (2009)
- Gradient Interfaces in SBS and SBS/PS Blends and Their Influence on Morphology Development and Material Properties
- Yi Thomann, Ralf Thomann, Alfred Hasenhindl, Rolf Mülhaupt, Barbara Heck, Konrad Knoll, Helmut Steininger, Kay Saalwächter. Macromolecules 42, 5684-5699 (2009)
- Understanding crystal orientation in quasi-one-dimensional polymer systems
- Yu Ma, Wenbing Hu, Jamie Hobbs, Guenter Reiter. Soft Matter 4, 540-543 (2008)
- Oligonucleotide nanostructured surfaces: effect on Escherichia coli curli expression
- Nicolas Cottenye, Francisco Teixeira Jr., Arnaud Ponche, Günter Reiter, Karine Anselme, Wolfgang Meier, Lydie Ploux, Corinne Vebert-Nardin. Macromolecular Bioscience 8, 1161-1172 (2008)
- 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)