Preparation of nano-polyethylene fibres using TiCl4/MCM-41 catalytic system

Nanofibrous ultrahigh molecular weight polyethylene synthesized using TiCl4 as catalyst supported on MCM-41 and SBA-15

“…Focused on these properties, many researchers immobilized catalysts on the mesopores of MMS for ethylene polymerization [4][5][6][7][8][9]. The most notable one among these was that Aida and coworkers [4] used MSF as support for the immobilization of Cp 2 TiCl 2 and applied it for the synthesis of polyethylene nanofibers.…”

“…They found that the presence of MgCl 2 increased the catalytic activity and gave the polyethylene with higher crystallinity and melting points. Wang [9] immobilized TiCl 4 indirectly on the inner pores of MCM-41 and used beta-cyclodextrin to destroy the exterior catalyst. They found the obtained PE morphology was mainly amorphous without beta-cyclodextrin.…”

Direct synthesis of fibrous high molecular weight polyethylene using vanadium catalysts supported on an SiO2ionic liquid system

“…Prolongation of the reaction time led to more entangled fibres. This is explained by the catalyst being deactivated in the polymerization time and therefore the smaller amount of active sites produces a smaller number of polyethylene chains which, although extended, may aggregate with more difficulty . It is difficult to evaluate the influence of monomer pressure on the morphology of the created polyethylene fibres, although the best results were obtained at 0.5 MPa.…”

Growth of Polyethylene Nanofibrils Over rac‐Et(Indenyl)2ZrCl2/MAO Catalyst Supported on Silica Nanotubes

“…Recently, mesoporous silica was used as a support for metallocene catalyst for ethylene polymerization and some interesting polymer morphologies have been observed . For example, Kageyama et al observed that extremely high molecular weight polyethylene was produced as the polymer extruded out from the mesopores of mesoporous silica fiber (MSF) as cocoon‐like nanofiber bundles with diameters of ca.…”