The ICBMS (UMR 5246), the CP2M (UMR 5128) and Michelin have partnered around a research program oriented towards the design of new-generation elastomers meeting high criteria of performance, recyclability and low environmental impact. We are developing a global approach that integrates the entire life cycle of elastomers, from raw materials to reuse/recycling. In particular, this work has led to the discovery of a family of copolymers containing ethylene, butadiene and ring units. These new rubbers, known as ethylene butadiene rubber (EBR – see the scheme below), are a particularly attractive class of materials for applications in durable tires, thanks to their improved resistance to wear.
We are seeking to enrich the EBR family of synthetic rubbers by modulating the characteristics of the polymer, synthesizing new EBR-based architectures. To meet this challenge, a combination of several catalysts or different polymerization chemistries (anionic and coordination catalysis) will be implemented. The key stage in the polymerization process lies in the ability of the growing polymer chains to shuttle between two different polymerization systems, thereby enabling unprecedented microstructures to be achieved. A joint experimental / theory investigation will be performed to fully master the original polymerization process.