Influence of Thermal Ageing Process on the Crack Propagation of Rubber Used for Tire Application
The present work studies the influence of thermal aging behaviour of rubber compounds based on natural rubber (NR), styrene–butadiene rubber (SBR) and their blend NR/SBR 60/40 on dynamic-mechanical and fatigue crack growth properties. The thermal ageing at the temperatures 70 and 110 °C has been applied, which closely simulates the real service conditions of tires. Dynamic-mechanical analysis (DMA) and fatigue crack growth (FCG) properties were characterised for the aged samples. The loss compliance J″ has been determined as a parameter, which effectively is detecting the embrittlement or softening/hardening behaviour of the aged rubber. Finally, the FCG studies revealed that increase in aging temperature has deleterious effect on crack growth resistance as was reflected in all the aged materials.
This paper was written with the support of the Education for Competitiveness Operational Program co-funded by the European Social Fund (ESF) and the government of the Czech Republic, in the project entitled ‘Advanced Theoretical and Experimental Studies of Polymer Systems’ (reg. number: CZ.1.07/2.3.00/20.0104), and with the support of the Research and Development for Innovations Operational Program, co-founded by European Regional Development Fund (ERDF) and the government of the Czech Republic, in the project entitled ‘Centre of Polymer Systems’ (reg. number: CZ.1.05/2.1.00/03.0111).
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