An amount of the aromatic vinyl polymer is preferably 5 to 150 parts by weight based on 100 parts by weight of the dienerubber.
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。
2
The rubber inner layer is made of natural gum or ethylene propylene dienerubber, and the rubber outer layer is made of chloroprene rubber or ethylene propylene dienerubber.
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。
3
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.