An amount of the aromatic vinyl polymer is preferably 5 to 150 parts by weight based on 100 parts by weight of the diene rubber.

以100重量份的二烯橡胶为基准，芳香乙烯基聚合物的含量优选为5 ~ 150重量份。

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The rubber inner layer is made of natural gum or ethylene propylene diene rubber, and the rubber outer layer is made of chloroprene rubber or ethylene propylene diene rubber.

橡胶内层的材质为天然胶或三元乙丙橡胶，外层橡胶的材质为氯丁胶或三元乙丙橡胶。

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In this thesis elastomers such as nitrile rubber (NBR-40), natural rubber (NR) and ethylene propylene diene monomer (EPDM) are blended with HDPE to improve the shape recovery properties of HDPE.

本文通过丁腈橡胶(nbr - 40)、天然橡胶(NR)、三元乙丙橡胶(EPDM)等弹性体与HDPE共混，提高了HDPE的形状回复能力。

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