Tuskaev, Vladislav A. published the artcileNovel titanium(IV) diolate complexes with additional O-donor as precatalyst for the synthesis of ultrahigh molecular weight polyethylene with reduced entanglement density: Influence of polymerization conditions and its implications on mechanical properties, Safety of 2,2′-Oxydiacetic acid, the main research area is titanium diolate complex precatalyst UHMWPE polymerization.
New alkoxo-titanium(IV) complexes with diolate ligand containing addnl. donor oxygen atom have been synthesized from readily available and scalable precursors. The structure of complex 4 was established by X-ray diffraction. Titanium atom adopts a distorted tetrahedral geometry formed by six oxygen atoms of ligands. The resulting complexes 3-4 are moderately or highly active in ethylene polymerization in the presence of {EtnAlCl3-n + Bu2Mg} binary cocatalysts. The influence of the nature of the solvent, the organoaluminum cocatalyst and the polymerization temperature on the activity of catalytic systems, and the properties of the resulting polymers were studied. The obtained polymers are linear polyethylene of ultrahigh mol. weight (up to 5.8·106 g mol-1) with a broad mol. weight distribution. The polymers are suitable for the modern methods of polymer processing-the solventless solid-state formation of super high-strength (breaking strength up to 2.8 GPa) and high-modulus (elastic modulus up to 140 GPa) oriented films and film tapes. The possibility of scaling up the synthesis of ultrahigh mol. weight polyethylene (UHMWPE) without a significant drop in the productivity of the catalytic system and polymer properties is shown. UHMWPE samples have been investigated by small-angle X-ray scattering (SAXS) methods to study the structural changes induced by solid-state drawing of nascent reactor powders.
Applied Organometallic Chemistry published new progress about Breaking strength. 110-99-6 belongs to class alcohols-buliding-blocks, name is 2,2′-Oxydiacetic acid, and the molecular formula is C4H6O5, Safety of 2,2′-Oxydiacetic acid.
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