The preparation of boron-containing aluminoxanes and their application as cocatalysts in the polymerization of olefins
نویسندگان
چکیده
Boron-moiety-containing aluminoxanes (BMAOs) were prepared from the partial protonolysis of Me3Al using various arylboronic acids. Compared with methylaluminoxane (MAO) generated from the hydrolysis of Me3Al, BMAO prepared from C6F5B(OH)2 and Me3Al induced a higher activity at the same Al/Ti ratio in the Ti-based olefin polymerization catalyst (ansa-Me2Si(Flu)(NBu) TiMe2; 5). The time course of propylene consumption when using BMAO showed the deactivation of the catalyst, whereas the 5–dMAO system promoted a living polymerization. Among the BMAOs, only those derived from arylboronic acids with electronwithdrawing groups were observed to act as efficient cocatalysts. Polymer Journal (2016) 48, 67–71; doi:10.1038/pj.2015.81; published online 30 September 2015
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