The structure of long-chain branching in polyethylene
β Scribed by N.M. Domareva; S.I. Kogan; N.Ya. Tumarkin
- Book ID
- 116048767
- Publisher
- Elsevier Science
- Year
- 1988
- Weight
- 301 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0032-3950
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Polyethylene produced by a vanadium-based polymerization catalyst contains long-chain branching as determined by NMR and rheology, even though the polymer has very low levels of vinyl unsaturation. A new mechanism is proposed for the formation of the long-chain branching, which involves COH bond act
With the recent development of new catalysts based on specific metallocenes, ethylene polymers with a narrow molecular weight distribution and comonomers placed homogeneously in the polymer chain have been accessible. In particular, bridged amido complexes can be used to integrate defined long-chain