The incorporation of biodiesel in the worldwide energetic matrix has an increasing tendency to use in the world. However, there are many technological challenges to consolidate this biofuel as an alternative to fossil fuels. The evaluation of the materials compatibilities used in the automotive industry and biodiesel production chain has been configured as an important area of research in finding appropriate materials that comes into contact with diesel biodiesel/blends. The present work aims to evaluate the physical properties for elastomeric composites prepared with polymeric matrix of ethylene propylene diene monomer (EPDM), acrylonitrile-butadiene rubber (NBR), natural rubber (NR) and styrene-butadiene rubber (SBR). The composites were prepared under controlled conditions of mixing and vulcanization. The elastomeric composites were aged in a blend containing 95 vol% of diesel and 5 vol% of biodiesel (B5 blend). The static total immersion tests were carried out at controlled temperature (50°C) for 7, 14, 21 and 28 days, substituting the B5 blend every 7 days. The results showed that the properties of NBR are less affected than other elastomers. It showed better mechanical performance and less influence on the glass transition temperature, indicating less degradation of this rubber in contact with B5 blend used in immersion tests.
Effects of octamethylcyclotetrasiloxane grafting and in situ silica particle generation on the curing and mechanical properties of a styrene butadiene rubber composite