Synthesis of Ultrahigh Molecular Weight Polyethylene Using Traditional Heterogeneous Ziegler−Natta Catalyst Systems

摘要: Ultrahigh molecular weight polyethylene was synthesized from traditional Ziegler−Natta type catalysts (ZN), namely, TiCl4 anchored on MgCl2 support. This, upon activation with AlRR′2 (where R, R′ = isoprenyl or isobutyl), gave precatalysts (C-2 to C-5) having 16, 21, 25, and 32% trivalent titanium, respectively. The reduction in oxidation states also accompanies the particle size of catalysts, which turn gets reflected resulting polymer properties under specified operating conditions. We have demonstrated effect process conditions that can surmount catalyst dependency over characteristics, hence, it result consistent properties, is an important need industries. characteristics such as distribution, average size, bulk density, reduced specific viscosity, concentration fine coarse particles were determined dependent various parameters. Under...