Academic Journal
Novel 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
| العنوان: | Novel 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 |
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| المؤلفون: | Tuskaev, Vladislav A., Gagieva, Svetlana Ch., Kurmaev, Dmitrii A., Bogdanov, Vyacheslav S., Magomedov, Kasim F., Mikhaylik, Elena S., Golubev, Evgenii K., Buzin, Mikhail I., Nikiforova, Galina G., Vasil'ev, Viktor G., Khrustalev, Viktor N., Dorovatovskii, Pavel V., Bakirov, Artem V., Shcherbina, Maksim А., Dzhevakov, Pavel B., Bulychev, Boris M. |
| المساهمون: | Russian Science Foundation, Russian Foundation for Basic Research, Ministry of Science and Higher Education of the Russian Federation |
| المصدر: | Applied Organometallic Chemistry ; volume 35, issue 7 ; ISSN 0268-2605 1099-0739 |
| بيانات النشر: | Wiley |
| سنة النشر: | 2021 |
| المجموعة: | Wiley Online Library (Open Access Articles via Crossref) |
| الوصف: | New alkoxo‐titanium(IV) complexes with diolate ligand containing additional 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 {Et n AlCl 3– n + Bu 2 Mg} 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 molecular weight (up to 5.8·10 6 g mol −1 ) 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 ultrahigh molecular 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. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1002/aoc.6256 |
| الاتاحة: | http://dx.doi.org/10.1002/aoc.6256 https://onlinelibrary.wiley.com/doi/pdf/10.1002/aoc.6256 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/aoc.6256 |
| Rights: | http://onlinelibrary.wiley.com/termsAndConditions#vor |
| رقم الانضمام: | edsbas.40A19D2F |
| قاعدة البيانات: | BASE |
| DOI: | 10.1002/aoc.6256 |
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