Single-Walled Carbon Nanotube Nucleated Solution-Crystallization of Polyethylene

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• 作者：Hiroki Uehara ; Kaori Kato ; Masaki Kakiage ; Takeshi Yamanobe ; Tadashi Komoto
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：December 27, 2007
• 年：2007
• 卷：111
• 期：51
• 页码：18950 - 18957
• 全文大小：1670K
• 年卷期：v.111,no.51(December 27, 2007)
• ISSN：1932-7455

文摘

Solution crystallization of polyethylene (PE) with single-walled carbon nanotubes (SWNTs) was investigatedby morphological observations and thermal analyses of the resultant films. In this study, long chains of ultrahigh-molecular-weight (UHMW) PE were chosen for a possible interaction with SWNTs. The solvent used wasdichlorobenzene, which can disperse both SWNTs and UHMW-PE chains in a hot solution. Electron microscopyobservation revealed that a unique network morphology composed of PE single-crystalline lamellae connectedby SWNT backbones is developed after cooling to room temperature. A comparison of the obtainedmorphologies for different SWNT concentrations suggested that SWNT surfaces function as nuclei for solution-crystallization of UHMW-PE. The melting behavior of the films prepared from the aggregates of UHMW-PE/SWNT composites indicated that SWNTs prevent the thickness doubling of solution-crystallized PE lamellaeduring heating, which is usually observed for the stacked single crystals of pure PE.