1. Polypropylene/Graphene Oxide Nanocomposites Prepared by In Situ ZieglerâNatta Polymerization.
- Author
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Yingjuan Huang, Yawei Qin, Yong Zhou, Hui Niu, Zhong-Zhen Yu, and Jin-Yong Dong
- Subjects
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POLYPROPYLENE , *OXIDES , *NANOCOMPOSITE materials , *ZIEGLER-Natta catalysts , *POLYMERIZATION , *SURFACE chemistry , *FUNCTIONAL groups , *TRANSMISSION electron microscopy , *ELECTRIC conductivity - Abstract
This paper reports the first example of preparation of polypropylene/graphene oxide (PP/GO) nanocomposites via in situ ZieglerâNatta polymerization. A Mg/Ti catalyst species was incorporated into GO via surface functional groups including âOH and âCOOH, giving a supported catalyst system primarily structured by nanoscale, predominantly single GO sheet. Subsequent propylene polymerization led to the in situ formation of PP matrix, which was accompanied by the nanoscale exfoliation of GO, as well as its gradual dispersion. Morphological examination of the ultimate PP/GO nanocomposites by TEM and SEM techniques revealed effective dispersion in nanoscale of GO in PP matrix. High electrical conductivity was discovered with thus prepared PP/GO nanocomposites; for example, at a GO loading of 4.9 wt %, Ïcwas measured at 0.3 S·mâ1. [ABSTRACT FROM AUTHOR]
- Published
- 2010
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