Berlin 2015 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 65: (Hydro)gels and Elastomers

CPP 65.1: Vortrag

Donnerstag, 19. März 2015, 09:30–09:45, PC 203

Application of a micro-structure based model to filler reinforced elastomer compounds typically used for rubber rollers — •Jan Plagge and Manfred Klüppel — Deutsches Institut für Kautschuktechnologie e.V., Hannover, Germany

The mechanical properties of several typical rubber roller compounds are investigated to get a deeper insight into the aging and wear mechanisms of rubber rollers under praxis conditions. For this purpose, a micro-structure based theoretical model is used linking the macroscopic mechanical response to microscopic network parameters, among them polymer-network moduli, polymer-filler-bond strengths and average filler-cluster-size. This so-called Dynamic Flocculation Model (DFM) is based on the non-affine tube model for highly entangled polymer networks and additionally takes into account hydrodynamic amplification by filler clusters as well as cyclic cluster-breakage and re-aggregation of filler-filler bonds. The influence of cross-linker-type and -concentration on the network parameters is investigated. Additionally, the effect of thermal aging is studied, whereby the focus is put on the polymer-filler and filler-filler bonds. To establish a connection to macroscopic quantities, several mechanical tests, including tensile strength, rebound and hardness are carried out for different stages of aging and cross-linker concentration. It can be concluded that the DFM is a very promising approach to relate aging and wear to changes in the microscopic structure of the polymer-filler-network.