Analysis of microstructure of ethylene-1-hexene copolymer prepared over thermally pretreated MgCl2/THF/TiCl4bimetallic catalyst

Synthesis of (co-)polyethylene with broad molecular weight distribution by the heterogenous Ziegler–Natta catalysts via one-pot strategy

“…For the copolymer of ethylene with 1-hexene, the comonomers reactivity ratios were calculated, respectively, r E = 34.77 for ethylene, r H = 0.03 for 1-hexene and r E Ár H = 1.04. The value was close to 1, reflecting a pronounced tendency for the random distribution of the comonomers in the copolymer chain [48].…”

Chemical compositional distribution of ethylene-1-butene copolymer prepared with heterogeneous ziegler-natta catalyst: TREF and crystaf analysis

“…A broad MWD of polyolefin produced with heteroge- neous Ziegler-Natta catalyst is considered to be an indicator of the presence of multi-active site in the heterogeneous polymerization catalyst. 5,12 Analysis of Copolymer. The chemical compositional distribution (CCD) or short chain branch (SCB) distribution of the copolymers was analyzed by both analytical TREF and Crystaf methods.…”

Effect of internal electron donor on copolymerization of ethylene and 1-hexene catalyzed by supported Ziegler- Natta catalysts

“…It has also been reported that the copolymerization ability of the active centers depends on the oxidation state and stereospecificity of Ti active sites [22]. Kakugo et al reported that nonstereospecific and syndiospecific active centers show higher activity toward ethylene than that of highly isospecific active centers, and the activity of low isospecific active sites toward ethylene is about twice that of the highly isospecific one [23].…”