Abstract Aiming at obtaining the polyolefin blends potentially applied in the field of the super-tough polymer products, in this work, isotactic polypropylene (iPP)/styrene-ethylene-butadiene-styrene block copolymer (SEBS) blends with great impact toughness were successfully fabricated by adding traces of β-nucleating agents (β-NAs) and carbon nanotubes (CNTs). The impact toughness of iPP blends with 30 wt% SEBS was as high as 62.4 kJ/m2, when simultaneously containing 0.1 wt% β-NAs and 0.05 wt% CNTs. Their toughness was about 13.1 kJ/m2 more than iPP blends with 30 wt% SEBS and 0.1 wt% β-NAs, 49.6 kJ/m2 more than iPP blends with 30 wt% SEBS and 0.05 wt% CNTs, and almost 22.3 times of pure iPP. The iPP matrix with abundant self-toughed β-crystals generated by β-NAs, the quasi-cocontiunous morphology of the SEBS dispersed phase as well as some small SEBS droplets induced by CNTs in the iPP matrix, and the good interfacial compatibility between SEBS and the iPP matrix all harmoniously took effect to synergistically enhance the toughness of iPP blends.

中文翻译：

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通过痕量 β-成核剂和碳纳米管增强具有准共连续相形态的等规聚丙烯/弹性体混合物的高韧性

摘要 为获得具有潜在应用的超韧聚合物产品领域的聚烯烃共混物，本工作成功制备了具有高冲击韧性的全同立构聚丙烯（iPP）/苯乙烯-乙烯-丁二烯-苯乙烯嵌段共聚物（SEBS）共混物。通过添加痕量 β-成核剂 (β-NAs) 和碳纳米管 (CNTs)。当同时含有 0.1 wt% β-NAs 和 0.05 wt% CNTs 时，iPP 与 30 wt% SEBS 共混物的冲击韧性高达 62.4 kJ/m2。它们的韧性比含有 30 wt% SEBS 和 0.1 wt% β-NAs 的 iPP 共混物高约 13.1 kJ/m2，比含有 30 wt% SEBS 和 0.05 wt% CNT 的 iPP 共混物高 49.6 kJ/m2，几乎是纯的 22.3 倍聚丙烯。β-NAs 产生的具有丰富自韧 β-晶体的 iPP 基质，