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F. Stadlbauer, T. Koch, F. Planitzer, W. Fidi, V. Archodoulaki:
"Advanced evaluation of the influence of material parameters and sample geometries on the crack growth in rubber";
Talk: Polymeric Materials 2012, Halle (Saale); 2012-09-12 - 2012-09-14; in: "Polymeric Materials 2012", (2012), 6 pages.

In order to quantify crack growth in rubber, an advanced measurement setup is developed that increases objectivity in crack length measurement and ensures quality control. The influence of sample geometries is evaluated and faint waist pure shear samples are chosen to estimate the influence of material parameters like filler content and polymer matrix under similar loading conditions. Formulations with various carbon black content are selected to correspond to different Shore A hardness values. The reinforcing effect of carbon black decreases when a certain filling content is exceeded as also indicated by fracture surfaces analysed by stereo and confocal microscope. The heat build-up is measured by thermal imaging. The plateau temperature and the temperature slope are greater the higher the amplitude of the loading and the higher the filler content. Using the same measurement setup the influence of the polymer matrix is determined for different formulations of unfilled polymer matrices. A high proportion of NR in a blend improves its dynamic behaviour.