Polyetherimide (PEI)-Siloxane Copolymers as an Alternative to Fluoropolymers

Environmental; Human Health; Safety; and Security (EHSS) concerns surrounding halogen-containing materials have created intense regulatory and supply pressure on the fluoropolymer industry. Fluoropolymers such as PVDF; ETFE and FEP are used in diverse applications due to their excellent balance of properties including durability (heat; chemical; UV resistance) and flexibility. However; many of these materials containing per- and polyfluoroalkyl substances (PFAS) have come under global regulatory pressure; leading many to seek alternative material solutions. Non-halogenated polyetherimide (PEI)-siloxane copolymers offer a unique combination of properties without intentionally added PFAS and are easily injection molded and extruded. The PEI block imparts high temperature capabilities; strength; and inherent flame retardancy while the siloxane block increases flexibility; elongation; and low temperature properties. These advanced materials can be considered for potential use in a variety of industries and applications including automotive; industrial; aerospace and telecommunication cables and wires. This presentation takes a looks at the prospect of using PEI-siloxane copolymers as alternatives to fluoropolymers for demanding wire and cable applications. Functional requirements such as high temperature performance; laser marking; and flame and smoke robustness are highlighted. Processing benefits of these materials are also explored.