propylene dimer

例句：

1. 1.The propylene dimer is a key intermediate in the production of polypropylene.
   丙烯二聚体是生产聚丙烯的关键中间体。
2. 2.The chemical industry uses propylene dimer as a raw material for producing various plastics.
   化工行业以丙烯二聚体为原料生产各种塑料。
3. 3.In the petrochemical industry, propylene dimer is often used as a feedstock for the production of ethylene.
   在石化行业中，丙烯二聚体常被用作生产乙烯的原料。