367281-63-8Relevant academic research and scientific papers
Polymer-incorporated iron catalysts for ethylene polymerization - A new approach to immobilize iron olefin catalysts on polystyrene chains
Liu, Changkun,Jin, Guoxin
, p. 1485 - 1489 (2002)
2,6-Bis(imino)pyridyl iron catalysts bearing allyl groups [ArN=C(Me)][Ar′N=C(Me)]C5H3NFeCl2 (Ar = Ar′ = 4-allyl-2,6-(i-Pr)2C6H2 (Cat-1); Ar = 2,6-(i-Pr)2C6H3, Ar′ = 4-allyl-2,6-(i-Pr)2C6H3 (Cat-2)) have been synthesized and characterized. The corresponding polymer-incorporated iron catalysts PC-1, PC-2 and their SiO2-supported core-shell structure catalysts SC-1 and SC-2 were obtained by the co-polymerization of the olefin groups of Cat-1 or Cat-2 with styrene in the presence of a radical initiator. All three types of catalysts (Cat-1 and Cat-2; PC-1 and PC-2; SC-1 and SC-2) have been investigated for ethylene polymerization. As a result, these catalysts were found to exhibit high activity using modified methylaluminoxane (MMAO) as a co-catalyst. Among them, the polymer-incorporated SiO2 core-shell catalysts displayed very high activity (～3181 g (mmol Fe)-1h-1) with product molecular weights in the range 25-93 × 104. The particle morphology of polyethylene produced by the core-shell structure catalysts (SC-1 and SC-2) was improved.
