EPDM三元共聚物由一种非共轭二烯烃与乙烯和丙烯一起聚合得到,具有饱和的主链和不饱和的侧基(图1上)。因此,EPDM与诸如NR、BR、SBR之类的二烯类橡胶相比,对氧气、臭氧、热和光具有更好的抗耐性。这一点使得EP(D)M成为户外和高温场合的首选弹性体,已广泛应 EPDM terpolymers are derived from the polymerization of a nonconjugated diolefin together with ethylene and propylene, with saturated backbone and pendant unsaturated groups (Figure 1). Therefore, EPDM has better resistance to oxygen, ozone, heat and light than diene rubbers such as NR, BR, SBR. This makes EP (D) M the preferred elastomer for outdoor and high temperature applications and has been widely used