Veröffentlichungen
Nach Erscheinungsjahr...
| 2016-2018 | 2019-2021 | 2022-2024 | 2025-2026 |
| 2004-2006 | 2007-2009 | 2010-2012 | 2013-2015 |
| bis 1990 | 1991-1995 | 1996-2000 | 2001-2003 |
... oder nutzen Sie die
Neueste Veröffentlichungen
Temperature dependence of crystal – melt coexistence for supported polyethylene filaments
Da Huang, Thorsten Hugel, Bizan N. Balzer, Günter Reiter. Nature Communications 16 (2025) 11127
The broken symmetry of molecular interactions at interfaces is causing that crystals are often covered by a thin liquid layer of their own melt. Such crystal–melt coexistence can be related to phenomena of surface premelting, secondary nucleation and melting point depression, particularly important for small systems. Here, we employed intermittent-contact mode atomic force microscopy imaging on nanoscopic semi-cylindrical filaments of polyethylene on a substrate to observe that these filaments contained a crystalline core bounded by molten regions of rather uniform width, W_soft= (9 ± 2) nm at room temperature, which increased reversibly with temperature T. Filaments smaller than ca. 2∙W_soft (T) were completely molten. The values of W_soft (T) compared favorably with theoretically predicted characteristic length scales in the context of nucleation, surface premelting and the melting point depression of finite size crystals. Altogether, we show that these three phenomena are related and dominated by the intermolecular forces acting at crystal surfaces.
Crystallization of Layers of Strongly Adsorbed Poly(ethylene terephthalate) on Silicon Substrates
Liang Chen, Zhihang Bian, Xiaonan Li, Zhenwei Jiang, Jianquan Xu, Decai Lin, Guenter Reiter, Jichun You, Xinping Wang. Macromolecules 58 (2025) 12222–12230
We examined the crystallization behavior of ultrathin layers of strongly adsorbed poly(ethylene terephthalate) (PET) chains on silicon substrates, yielding a characteristic morphology of uniquely curved dendritic polymer crystals. The observed curvature resulted from bent edge-on lamellar crystals from which terraced flat-on branched lamellar crystals grew essentially from the convex outer side. The degree of bending increased with decreasing crystallization temperature and increasing strength of polymer/substrate interactions. We propose that unbalanced stresses acting on the fold surfaces of PET lamellar crystals, probably induced by strong interactions with the substrate, were responsible for the observed curvature of the lamellar crystals. (more...)
Crystallization and Melting of Polyethylene Strongly Cross-linked in the Molten State
Jingqing Li, Weihua Wang, Yunxiang Shi, Barbara Heck, Chuanfu Luo, Jesper de Claville Christiansen, Donghong Yu, Günter Reiter, Shichun Jiang. Soft Matter 21 (2025) 6422
We examined the crystallization and melting behavior of highly cross-linked polyethylene (xPE) samples, including structural characterization of the resulting crystalline domains. Using γ-ray irradiation, cross-linking was performed in the molten state and not in the solid state. This approach assured a statistical and homogeneous distribution of the cross-link points. Upon increasing the radiation dose, the molecular weight of the strands connecting the cross-link points reached values even lower than that of the strands between physical entanglements. (more...)
Liste der Veröffentlichungen
- Observation of the early stages of crystallization in polyethylene by time-dependent SAXS: Transition from individual crystals to stacks of lamellae
- T. Albrecht, G. Strobl. Macromolecules 29, 783-785 (1996)
- Autophobic Behavior of Polymers at Interfaces
- G. Reiter, P. Auroy, L. Auvray. Proceedings of the Moriond 95 Workshop, in: Moriond Condensed Matter Physics: “Short and Long Chains at Interfaces”, eds. J. Daillant, P. Guenoun, C. Marques, P. Muller, J. Trân Thanh Vân, p. 57-66
- The Solid-like State of a Confined Liquid Lubricant: Deformation and Time Effects
- G. Reiter, A. L. Demirel, J. Peanasky, L. Cai, S. Granick. Proceedings of the NATO Workshop on “The Physics of Sliding Friction” at Trieste/Italy, 1995,. Eds. B.N.J. Persson, E. Tosatti, NATO ASI Serie E, 311, 119-128 (1996)
- What Determines Static Friction and Controls the Transition to Sliding
- G. Reiter, A. L. Demirel, J. Peanasky, L. Cai, S. Granick. Tribology Lett. 1, 1 (1995)
- Temperature-Dependent Crystalline-Amorphous Structures in Isotactic Polypropylene - Small-Angle X-Ray-Scattering Analysis of Edge-Bounded 2-Phase Systems
- T. Albrecht, G. Strobl. Macromolecules 28, 5267-5273 (1995)
- Periodic Pattern Formation in Side-Group Polymer Nematic Solutions at the Twist Frederiks Transition
- E. E. Pashkovsky, W. Stille and G. Strobl. J. Phys. II France 5, 397 (1995)
- Temperature-Dependent Crystalline-Amorphous Structures in Linear Polyethylene - Surface Melting and the Thickness of the Amorphous Layers
- T. Albrecht, G. Strobl. Macromolecules 28, 5827-5833 (1995)
- The effect of molecular association and tube dilation on the rotational viscosity and rotational diffusion in nematic liquid crystals
- A. Raviol, W. Stille, and G. Strobl. J. Chem. Phys. 103, 3788 (1995)
- Nematic Wetting at the Free-Surface of 4-Cyano-4'-N-Alkyl-Biphenyls
- H. Kasten, G. Strobl. Journal of Chemical Physics 103, 6768-6774 (1995)
- The Dynamics of Freedericksz Transitions in Nematic Solutions of Mesogenic Polymers
- E. E. Pashkovsky, T. G. Litvina, W. Stille, and G. Strobl. Vysokomolekulyarnye Soedineniya Seriya A 37, 1272 (1995)
- Self Diffusion of “Hairy Rod” Molecules in Langmuir-Blodgett-Kuhn Multilayers Probed with Neutron and X-ray Reflectometry
- A. Schmidt, K. Mathauer, G. Reiter, M.D. Foster, M. Stamm, G. Wegner, W. Knoll. Langmuir 10, 3820 (1994)
- Stick to Slip Transition and Adhesion of Lubricated Surfaces in Moving Contact
- G. Reiter, A.L. Demirel, J. Peanasky, L. Cai, S. Granick. J. Chem. Phys. 101, 2606 (1994)
- From Static to Kinetic Friction in Confined Liquid Films
- G. Reiter, A.L. Demirel, S. Granick. Science 263, 1741 (1994)
- Dewetting as a Probe of Polymer Mobility in Thin Films
- G. Reiter. Macromolecules 27, 3046 (1994)
- Chain Reorientation in Poly(tetrafluoroethylene) by Mobile Twin-Helix Reversal Defects
- M. Kimmig, G. Strobl, B. Stühn. Macromolecules 27, 2481-2495 (1994)
- Local Motion in the beta-Transition Range of Partially Crystalline Polyethylene Studied by Neutron-Scattering
- B. Holzer, G. Strobl, B. Stühn, N.H. Andersen. Colloid and Polymer Science 272, 1396-1402 (1994)
- Dynamics of Rotational Motion in Liquid Crystalline Systems
- W. Stille, G. Strobl. in: R. Richert, A. Blumen (Eds.), Disorder Effects on Relaxational Processes, p. 725, Springer, Berlin (1994).
- Molecular Weight Dependence of the Rotational Diffusion Constant and the Rotational Viscosity of Liquid Crystalline Side Group Polymers
- S. Götz, W. Stille, G. Strobl, H. Scheuermann. Macromolecules 26, 1520 (1993)
- Near-Critical Behavior of the Dynamic Stress-Optical Coefficient in Liquid Crystalline Elastomers
- R. Sigel, W. Stille, G. Strobl and R. Lehnert. Macromolecules 26, 4226 (1993)
- Adhesion Instabilities of Surfaces Undergoing Shear
- G. Reiter, J.S. Peanasky, L. Cai, A.L. Demirel, S. Granick. ACS Polymer Preprint Fall 1993