Cov qauv molecular ntawm EPDM roj hmab yog Copolymer ntawm ethylene, propylene, thiab tsis muaj kev cawm dim ntawm qee cov proportion. Nws cov qauv molecular muaj cov qauv kev pom zoo thiab cov txhab ua haujlwm me me, nrog rau cov chav ua haujlwm, xws li methylbutadiene lossis isoprene.
