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Unique Insertion Mode of 1,7-Octadiene in Copolymerization with Ethylene by a Constrained-Geometry Catalyst

✍ Scribed by Naofumi Naga; Akinori Toyota

Publisher: John Wiley and Sons
Year: 2004
Tongue: English
Weight: 122 KB
Volume: 25
Category: Article
ISSN: 1022-1336
DOI: 10.1002/marc.200400250

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✦ Synopsis

Abstract

Summary: The copolymerization of ethylene and 1,7‐octadiene (OD) was investigated with a constrained‐geometry catalyst. The ^13^C NMR spectrum of the copolymer indicated cyclization insertion of the OD unit in the penultimate position after a single ethylene insertion step. This unique insertion mode of OD forms a 1,5‐disubstituted cyclononane unit in the main chain of polyethylene.

Copolymerization of ethylene and 1,7‐octadiene (OD) with a constrained‐geometry catalyst.

magnified imageCopolymerization of ethylene and 1,7‐octadiene (OD) with a constrained‐geometry catalyst.

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Microstructural Characterization of Molecular Weight Fractions of Ethylene/1,7-Octadiene Copolymers Made with a Constrained Geometry Catalyst

✍ Deborah M. Sarzotti; Abhishek Narayan; Philip M. Whitney; Leonardo C. Simon; Joã 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 229 KB

## Abstract Summary: Ethylene was copolymerized with 1,7‐octadiene (OD) using a methylaluminoxane (MAO) activated constrained geometry catalyst (dimethylsilyl(__N‐tert__‐butylamido)(tetramethylcyclopentadienyl)titanium dichloride; CGC‐Ti) at 140 °C in toluene. The polymerization activity increased