Carbocationic Polymerization in Supercritical Co2. IV.* The Isomerization Polymerization of 3-Methyl-1 -Butene and 4-M Ethyl-1 -Pentene

T. Pemecker, G. Deák

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Abstract

The first carbocationic isomerization polymerization of 3-methyl-1-butene and 4-methyl-1-pentene in supercritical carbon dioxide (SC.CO2) has been demonstrated. The use of the “H2O”/AlCl3initiating system at 32.5°C readily gives -40% conversions of poly (3-methyl-1 -butene) of Mn = 1000 (Mw/Mn = 1.41), and -70% conversions of poly(4-methyl-1-pentene) of Mn = 1700 (Mw/Mn = 2.16). According to IR spectroscopy the degrees of isomerization in SC.CO2at 32.5°C are similar to those occurring in conventional liquid systems at much lower temperatures. The nature and mechanism of side reactions are discussed.

Original languageEnglish
Pages (from-to)969-978
Number of pages10
JournalJournal of Macromolecular Science - Pure and Applied Chemistry
Volume32
Issue number7
DOIs
Publication statusPublished - 1995

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ASJC Scopus subject areas

  • Chemistry(all)
  • Ceramics and Composites
  • Materials Chemistry
  • Polymers and Plastics

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