𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Propene polymerization with zirconocene catalysts supported on siloxane copolymers

✍ Scribed by Kazuo Soga; Hoang The Ban; Takashi Arai; Toshiya Uozumi

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
411 KB
Volume
198
Category
Article
ISSN
1022-1352

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

A supported version of zirconocene catalysts on siloxane copolymers having 1,2,3,4‐tetramethylcyclopentadienyl (Cp″)‐fluorenyl (Flu) (I) or cyclopentadienyl (Cp)‐fluorenyl (II) groups as substituents was prepared and applied to propene polymerization using methylalumoxane (MAO) or [Ph~3~C][B(C~6~F~5~)~4~] as cocatalyst. Catalyst (I), which was soluble in toluene, exhibited very low activity, whereas catalyst (II), which was composed of a toluene soluble (Cat‐A) and an insoluble fraction (Cat‐B), displayed a fairly high activity. Both catalysts (A and B) give a mixture of syndiotactic, atactic and a small quantity of isotactic polypropene, with a fraction of syndiotactic pentads ranging from about 50–75%. In contrast, the corresponding non‐supported catalyst gives almost completely atactic polypropene.

📜 SIMILAR VOLUMES

Polymerization of propene with highly is
Polymerization of propene with highly isospecific. SiO2-supported zirconocene catalysts activated with common alkylaluminiums
✍ Kazuo Soga; Hyun Joon Kim; Takeshi Shiono 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 547 KB

## Abstract Several types of SiO~2~‐supported metallocene catalysts were prepared using chemically modified silica gel. Polymerization of propene was conducted with these catalysts combined with methylaluminoxane (MAO) or ordinary alkylaluminiums. Highly isotactic poly(propylene) with high molecula

Syntheses of poly(siloxane)-supported zi
Syntheses of poly(siloxane)-supported zirconocene catalysts and application to olefin polymerizations
✍ Takashi Arai; Hoang The Ban; Toshiya Uozumi; Kazuo Soga 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 150 KB 👁 2 views

Poly(siloxane)s with bisindenyl, bisfluorenyl, bis(1,2,3,4-tetramethylcyclopentadienyl), bis (2,4,7-trimethylindenyl) and monoindenylmethyl side groups were synthesized by condensation of the corresponding dichlorosilanes and water. For reference, diphenylsilanediol or hydroquinone was also employed

ChemInform Abstract: Propene Polymerizat
ChemInform Abstract: Propene Polymerization with Silica-Supported Metallocene/MAO Catalysts
✍ Gerhard Fink; Bernd Steinmetz; Joachim Zechlin; Christian Przybyla; Bernd Tesche 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 25 KB 👁 1 views

## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v

On the interaction of supported zirconoc
On the interaction of supported zirconocene catalysts with alkylaluminium co-catalysts
✍ Nina V. Semikolenova; Vladimir A. Zakharov 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 472 KB

## Abstract The interaction of supported metallocene catalysts with methylaluminoxane leads to the desorption of the metallocene compound from the surface of the support and the formation of highly active homogeneous complexes. The catalytic properties of the system and characteristics of polyethyl