A study of the combined use of carbon black and silicon dioxide in tyre tread formulations. Part 5. The Payne effect

摘要

In the previous communications [1-4], the results were given of studying the dependence of the processing, physicomechanical, dynamic, and service properties of tread rubbers on the content and ratio of silicon dioxide and carbon black in their composition. A ternary combination of rubbers was used as the rubber component: natural rubber of grade STR-20 (8.0 parts), stereoregular butadiene rubber SKD-N (20.0 parts), and oil-extended styrene butadiene rubber Buna VSL 4526-2 HM (99.0 parts). The rubber mixes contained either carbon black of grade N339 or silicon dioxide of grade Zeosil 1165, or their combinations in different ratios. The total content of fillers amounted to 80.0 parts per 100 parts rubber component. As the coupling agent (bisilane), use was made of bis[3-(triethoxysilyl)propyl] polysulphide of grade X50S in a quantity of 10.0 parts per 100 parts silicon dioxide. The rubber mixes were prepared in three stages.