Polyolefin spheres from metallocenes supported on noninteracting polystyrene

Stephen B. Roscoe*, Jean M.J. Fréchet, John F. Walzer, Anthony J. Dias

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

154 Scopus citations


To obviate the destructive interaction of highly reactive metallocene catalysts with classical silica-based supports while retaining the advantage of supported catalysts, a noninteracting polystyrene support was developed. Supported catalysis for the polymerization of α-olefins are prepared by treating lightly cross-linked, chloromethylated polystyrene beads consecutively with a secondary amine, an ammonium salt of a weakly coordinating anion, and a neutral dialkylmetallocene. Catalytic sites are distributed homogeneously throughout the support particle, and the polymerization occurs within the bead, in contrast to traditional surface- supported metallocene catalysts. The copolymerization of ethylene and 1- hexene at 40°C affords discrete spherical polyolefin beads with a size (0.3 to 1.4 millimeters) that varies according to the polymerization time.

Original languageEnglish (US)
Pages (from-to)270-273
Number of pages4
Issue number5361
StatePublished - Apr 10 1998
Externally publishedYes

ASJC Scopus subject areas

  • General


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