Affiliation:
1. N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences
Abstract
The features of ethylene polymerization in the presence of dichloridobis(salicylaldaryliminato)titanium(IV) complexes containing a 4-allyloxy-2,3,5,6-tetrafluorophenylimino group, namely, {2‑[(4-CH2=CH-CH2O)C6F4N=CH]-6-R1-4-R2-C6H2O}2TiCl2 (R1 = t-Bu, CMe2(Ph); R2 = H, Me, OMe, t-Bu, CMe2(Ph), Cl, Br) in the presence of methylalumoxane, have been studied. All the complexes exhibit high catalytic activity (27.8×106 гПЭ∙мольTi‐ 1∙МПаC2H4-1∙ч‐ 1)) in the temperature range of 10‒60°C and form powdered ultrahigh molecular weight polyethylene (UHMWPE) (M = (4.4–16.0) × 106 g/mol) with a low number of intermolecular entanglements. It has been shown that during polymerization, the complexes are immobilized on UHMWPE macromolecules.
Publisher
The Russian Academy of Sciences
Reference46 articles.
1. Stürzel M., Mihan S., Mülhaupt R. // Chem. Rev. 2016. V. 116. P. 1398.
2. Kurtz S.M. The UHMWPE Handbook: Ultra-High Molecular Weight Polyethylene in Total Joint Replacement. London: Elsevier, 2004.
3. Encyclopedia of Polymer Science and Engineering / Ed. by H.F. Mark, N.M. Bikales, C.G. Overberger, G. Menges, J.I. Kroschwitz. New York: Wiley Interscience, 1985. V. 6. P. 490.
4. Sun Y., Wang Q., Li X., Chen X., Ma Y., Zhang Q., Jin X., Jiang Y., Sun L., Luo Q. // J. Appl. Polym. Sci. 2005. V. 98. P. 474.
5. Brach del Prever E.M., Bistolfi A., Bracco P., Costa L. // J. Orthopaed. Traumatol. 2009. V. 10. P. 1.