eteenipropyleeni

Eteenipropyleeni, often abbreviated as EPM or EPR, is a synthetic rubber copolymer. It is formed by the polymerization of ethylene and propylene monomers. This combination results in a saturated polymer backbone, which imparts excellent resistance to ozone, weathering, and heat. EPM elastomers are typically terpolymers, incorporating a third monomer, often a diene, to allow for vulcanization using sulfur-based curing systems. However, non-sulfur curable EPMs also exist.

The properties of EPM can be tailored by adjusting the ratio of ethylene to propylene and the type and amount of diene incorporated. Higher propylene content generally leads to a softer, more flexible rubber, while higher ethylene content increases hardness and tensile strength. EPM exhibits good electrical insulation properties, making it suitable for wire and cable applications. It also demonstrates good resistance to polar solvents, dilute acids, and alkalis. However, it is not resistant to non-polar solvents like mineral oils and aliphatic hydrocarbons. Common applications include automotive hoses and seals, roofing membranes, electrical insulation, and industrial rubber goods.