Copolymerization of styrene and ethylene with monocyclopentadienyltitanium trichloride/methylaluminoxane catalyst. Characterization of the product

Päivi Aaltonen*, Jukka Seppälä

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    48 Citations (Scopus)

    Abstract

    Styrene and ethylene were copolymerized in the presence of a catalytic system based on CpTiCl3 and methylaluminoxane. 13C-NMR, FTIR, GPC and calorimetric techniques were employed to study the structure of the polymerization product. The 13C-NMR spectrum showed only three resonances which could be assigned to the methylene and methine protons of syndiotactic polystyrene and to the aliphatic carbon of polyethylene. Thus, the polymer was not a true copolymer but a mixture of polystyrene and polyethylene. Two melting endotherms and two molecular weight distributions were observed. In addition, a very low molecular weight (boiling butanone soluble) fraction was isolated. The existence of several polymerization products suggests the presence of more than one active species in the catalyst.

    Original languageEnglish
    Pages (from-to)683-687
    Number of pages5
    JournalEuropean Polymer Journal
    Volume30
    Issue number6
    DOIs
    Publication statusPublished - 1994
    MoE publication typeA1 Journal article-refereed

    Keywords

    • catalyst
    • copolymerization
    • ethylene
    • styrene

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