The effect of recycled rubber powder obtained from reclaimed tires on the mechanical and thermal properties of aging rubber composite materials based on BR / SBR / WRP

Since reusing of reclaimed tire is considered as part of a polymer matrix alternative, in this paper the WRP up to20 phr replaced with the BR / SBR elastomer compound and aged from240 to 960 hours under environmental conditions (23 ± 3 °c) in aging chamber. The effect of the WRP was investigated on their rheological and physico-mechanical properties. Composite morphology and structural analysis, as well as their thermal behavior, were followed by scanning electron microscopy (SEM) and thermal analysis (TG / DTG). The results show that the presence of waste rubber powder up to20 phr as a substitute for the primary polymer matrix improves curing rate, steress crack resistance, tensile strength and hardness of the compound. The performance of BR / SBR / WRP composites compared to the BR / SBR samples shows a slight change in the mechanical properties, while modulus and composite hardness are associated with a slight increase. The use of waste rubber powder, as well as its cost-effectiveness, helps to protect the environment, reduce chemical consumption, prevent water and soil pollution, and reduce landfill, etc.