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Buckminsterfullerene : A Strong, Covalently Bonded, Reinforcing Filler and Reversible Cross-Linker in the Form of Clusters in a Polymer

机译:Buckminsterfullerene:一种强的,共价键合的,填充剂和可逆交联剂,呈聚合物簇形式存在

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摘要

A Buckminsterfullerene/polyisoprene (C60/PI) composite was synthesized at high-temperature, high-pressure (HP&HT) conditions. The composite has significantly improved tensile strength and Young’s modulus, by up to 49% and 88% per wt % C60, respectively, which is much higher than for corresponding composites with carbon nanotube (CNT) fillers. The reinforcing action of C60 fillers is different from that of CNTs as C60 becomes covalently bonded to PI chains, and C60 clusters in PI form C60–C60 covalent bonds. The latter are reversible and break by heating at 1 bar, which suggests improved recyclability of the material and indicates that carbon nanostructures can be used as strong reversible cross-linkers (“vulcanizers”) in elastomers.
机译:在高温,高压(HP&HT)条件下合成了Buckminsterfullerene /聚异戊二烯(C60 / PI)复合材料。该复合材料的抗张强度和杨氏模量显着提高,分别达到C60 / wt%C60的49%和88%,这比具有碳纳米管(CNT)填料的相应复合材料要高得多。 C60填料的增强作用不同于CNT,因为C60与PI链共价键合,并且PI中的C60簇形成C60–C60共价键。后者是可逆的,在1 bar的加热下会破裂,这表明材料的可回收性提高,表明碳纳米结构可用作弹性体中的强可逆交联剂(“硫化剂”)。

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