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

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• 作者：Junchun Yu ; Mingguang Yao ; Gerhard Gr枚bner ; Bertil Sundqvist ; Bounphanh Tonpheng ; Bingbing Liu ; Ove Andersson
• 刊名：ACS Macro Letters
• 出版年：2013
• 出版时间：June 18, 2013
• 年：2013
• 卷：2
• 期：6
• 页码：511-517
• 全文大小：512K
• 年卷期：v.2,no.6(June 18, 2013)
• ISSN：2161-1653

文摘

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鈥檚 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鈥揅₆₀ 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 (鈥渧ulcanizers鈥? in elastomers.