Extrusion foaming behavior of polybutene‐1. Toward <scp>single‐material</scp> multifunctional sandwich structures

Polymeric foams are a key element of many multifunctional sandwich structures. The most commonly used polymeric foam, polyurethane, presents environmental drawbacks, related to poor recyclability and the use toxic diisocyanates for their manufacturing. separation layers in structures is further unresolved hurdle toward these elements. There need broadening spectrum foams. In this context, foamability polybutene-1 (PB-1) studied through extrusion foaming experiments. From application side, PB-1 would allow manufacturing district heating pre-insulated pipes out one single material, bringing circular product design energy sector. scientific there knowledge gap polymers rubbery state at room temperature, such as PB-1, due difficulties cell stabilization step. This supports research polymer. study, four commercial grades were evaluated, covering different chain structures, molecular weights, crystallinity degrees. Very behaviors found. Dimensionally stable achieved with two homopolymers tested, demonstrating