title: Immobilization of isolated FI catalyst on polyhedral oligomeric silsesquioxane-functionalized silica for the synthesis of weakly entangled polyethylene.
abstract: Polyhedral oligomeric silsesquioxanes (POSSs) were adsorbed on methylaluminoxane-activated silica for the immobilization of fluorinated bis(phenoxyimine)Ti complexes (FI catalyst). These POSSs have been characterized as horizontal spacers isolating the active sites and hindering the chain overlap in polymerization. The heterogeneous catalyst exhibits considerable activity in the synthesis of weakly entangled polyethylene.
authors.affiliation: Department of Polymer Science and Engineering, School of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, Zhejiang, P. R. China. liwei@nbu.edu.cn.
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.forename: Huaqin
authors.initials: H
authors.lastname: Yang
authors.forename: Jingjing
authors.initials: J
authors.lastname: Zhang
authors.forename: Jingshan
authors.initials: J
authors.lastname: Mu
authors.forename: Dirong
authors.initials: D
authors.lastname: Gong
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Wang