Recent research indicates that adding another kind of olefin monomer into the ethylene-propylene-diene system will obtain a new type of EPR with special properties.

• 近期研究表明,在乙烯-丙烯-二烯基础上再引入另一种烯烃单体参加共聚合反应,可合成性能更具有专门化的四元乙丙橡胶。