Novel Titanium (IV) Diolate Complexes with Additional O-donor as pre-catalyst for the synthesis of ultra-high molecular weight polyethylene with reduced entanglement density. Influence of Polymerization Conditions and Its Implications on Mechanical Proper

Тускаев, В.А.; Гагиева, С.Ч.; Курмаев, Д.А.; Богданов, В.С.; Магомедов, К.Ф.; Михайлик, Е.С.; Голубев, Е.К.; Бузин, М.И.; Никифорова, Г.Г.; Васильев, В.Г.; Хрусталев, В.Н.; Дороватовский, П.В.; Бакиров, А.В.; Щербина, М.А.; Джеваков, П.В.; Булычев, Б.М.

Авторы: Тускаев В.А., Гагиева С.Ч., Курмаев Д.А., Богданов В.С., Магомедов К.Ф., Михайлик Е.С., Голубев Е.К., Бузин М.И., Никифорова Г.Г., Васильев В.Г., Хрусталев В.Н., Дороватовский П.В., Бакиров А.В., Щербина М.А., Джеваков П.В., Булычев Б.М.
Журнал: Applied Organometallic Chemistry
Том: 35
Номер: 7
Год издания: 2021
Издательство: John Wiley & Sons Inc.
Местоположение издательства: United States
Номер статьи: 6256
DOI: 10.1002/aoc.6256
Аннотация: New alkoxo-titanium (IV) complexes with diolate ligand containing additional donor oxygen atom have been synthesized from readily available and scalable precursors. 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 co-catalysts. The influence of the nature of the solvent, the organoaluminum co-catalyst 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 molecular weight (up to 5.8 ⸱ 106 g/mole) with a broad molecular 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 UHMWPE without a significant drop in the productivity of the catalytic system and polymer properties are 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.
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Novel Titanium (IV) Diolate Complexes with Additional O-donor as pre-catalyst for the synthesis of ultra-high molecular weight polyethylene with reduced entanglement density. Influence of Polymerization Conditions and Its Implications on Mechanical Properстатья

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