Technical Glossary
Ethlene Propylene Rubber
[Ethylene Propylene Rubber]
Ethylene propylene rubber (EPDM) is a synthetic rubber, which is synthesized through the copolymerization of general use plastics ethylene and propylene. The American Society for Testing Materials (ASTM) code is EMP.
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Ethylene and propylene are both plastics on their own. However, when copolymerized, the resulting material has a heterogeneous structure, which has rubber-like characteristic.
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Radical cross-linking can be achieved with peroxides, however there are also types of ethylene propylene rubber which achieve cross-linking by copolymerizing with a third component which includes a double bond; these are called ethylene propylene diene monomer rubbers (EPDM or EPT). This process is called coordinated ionic polymerization.
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