膨胀石墨改性氢化苯乙烯-丁二烯-苯乙烯嵌段共聚物/聚丙烯弹性体的制备与性能

分别采用膨胀石墨和纳米Fe₃O₄插层膨胀石墨改性氢化苯乙烯-丁二烯-苯乙烯嵌段共聚物(SEBS)/聚丙烯(PP)弹性体材料，探讨了膨胀石墨用量及纳米Fe₃O₄插层复合膨胀石墨对弹性体拉伸性能、回弹性和导电性能的影响规律。结果表明，膨胀石墨的加入可有效提高SEBS/PP弹性体的回弹性和导电性能，当膨胀石墨用量为3.5份(质量)时，弹性体的回弹性最佳，表面电阻率最低，但其拉伸强度有所下降。采用纳米Fe₃O₄插层膨胀石墨改性SEBS/PP弹性体可有效改善其拉伸性能，并可进一步降低表面电阻率和体积电阻率。

Preparation and properties of expanded graphite modified hydrogenated styrene-butadiene-styrene block copolymer/polypropylene elastomers

Hydrogenated styrene-butadiene-styrene block copolymer/polypropylene elastomers were modified with expanded graphite (EG) and nano-Fe3O4 intercalated EG respectively, the effects of amount of EG and nano-Fe3O4 intercalated EG on the tensile properties, resilience property and electrical conductivity of the elastomers were investiga-ted. The results showed that the addition of EG could effectively improve the resilience and electrical conductivity of the elastomers. When the amount of EG was 3.5 phr (mass), the elastomer had the best resilience and the lowest surface resistivity, but its tensile strength decreased. The tensile properties of the elastomer modified by nano-Fe3O4 intercalated EG could be effectively improved, and the surface resistivity and volume resistivity could be further reduced.