Shifting From Ziegler-Natta to Philips-Type Catalyst? A Simple and Safe Access to Reduced Titanium Systems for Ethylene Polymerization

• Published in: Macromolecular rapid communications. Vol. 32; no. 23; pp. 1921 - 1924
• Main Authors: Popoff, Nicolas, Espinas, Jeff, Gouré, Eric, Boyron, Olivier, Le Roux, Erwan, Basset, Jean-Marie, Gauvin, Régis M., De Mallmann, Aimery, Taoufik, Mostafa
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01-12-2011; WILEY‐VCH Verlag; Wiley Subscription Services, Inc; Wiley-VCH Verlag
• Subjects: activation; Aluminum; Catalysis; Catalysts; Chemical Sciences; Chlorides; Chlorides - chemistry; Ethylene; Ethylenes - chemistry; organometallic catalysts; polyethylene; Polyethylene - chemical synthesis; Polyethylene - chemistry; Polymerization; Polymers; Reagents; Silica; Silicon Dioxide - chemistry; Titanium; Titanium - chemistry; transition metal chemistry
• ISSN: 1022-1336; 1521-3927; 1521-3927
• DOI: 10.1002/marc.201100477

Silica‐supported titanium(IV) chloride is readily reduced by Mashima and co‐workers' reagent (1‐methyl‐3,6‐bis(trimethylsilyl)‐1,4‐cyclohexadiene) to afford materials active in ethylene polymerisation without need of aluminum alkyl cocatalyst.
The reduction of silica‐supported titanium(IV) chloride provides an ethylene polymerization catalyst. Generation of active species from [(≡SiO)TiCl3] is accomplished without use of hazardous aluminum alkyl derivative as cocatalyst. The obtained catalytic material produces high molecular weight polyethylene.