Copolymerization of ethylene and styrene with monocyclopentadienyltitanium trichloride/methylalumoxane catalyst
β Scribed by Leone Oliva; Stefano Mazza; Pasquale Longo
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 339 KB
- Volume
- 197
- Category
- Article
- ISSN
- 1022-1352
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β¦ Synopsis
Abstract
A series of ethyleneβstyrene copolymerizations was carried out in the presence of cyclopentadienyltitanium trichloride and methylalumoxane at 20Β°C and at different comonomer feed compositions. By sequential extraction a copolymeric material with a styrene units content up to 36 molβ% can be separated from the homopolymeric products. Some considerations about the relative reactivity of the comonomers and the regioregularity of the styrene insertion are made on the basis of the ^13^C NMR spectra.
π SIMILAR VOLUMES
The copolymerization of styrene and ethylene was attempted in the presence of the catalytic system CpTiCl,methylaluminoxane. Polymerizations were carried out at different polymerization temperatures and Al/Ti mole ratios. The structure of the polymer was investigated with FTIR, DSC, GPC, and "C-NMR
## Abstract Copolymerization of styrene (St) and isoprene (IP) with nickel(II) acetylacetonate [Ni(acac)~2~] and methylalumoxane (MAO) catalyst was investigated. It was found that the Ni(acac)~2~βMAO catalyst is effective for the copolymerization of St and IP. From the copolymerization of St (M~1~)
Ethene was copolymerized with styrene using five different methylalumoxane (MAO) activated half-sandwich complexes of the general formula Me 2 Si(Cp)(N-R)MCl 2 , varying the substituents on the cyclopentadienyl ring and the substituent on the amide (Cp Γ tetramethylcyclopentadiene CBT, 1-indenyl IBT