考察了苯乙烯-二元乙丙橡胶嵌段共聚物(S EP)和三元乙丙橡胶(EPDM)对聚丙烯(PP)的增韧作用。

The effect on the toughening of polypropylene (PP) by styrene-ethyl ene propylene diblock copolymer (SEP) as well as EPDM was studied.

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对于非均质岩心，聚合物对驱油效率的贡献大于表面活性剂的贡献，此外还对三元段塞注入的大小和浓度进行了优化。

To heterogeneous core, the contribution of polymer to the displacement efficiency is higher than that of surfactant. The size of the ASP slug and the concentration of chemicals were also optimized.

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热施工密封胶的主体材料主要是异丁烯类聚合物、三元乙丙橡胶和热塑性的苯乙烯嵌段共聚物。

Heat of the main construction material sealant mainly isobutene polymer, EPDM rubber and thermoplastic styrene block copolymer.

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