Polar Isotactic and Syndiotactic Polypropylenes by Organozirconium-Catalyzed Masking-Reagent-Free Propylene and Amino–Olefin Copolymerization

Minglu Huang, Jiazhen Chen, Binghao Wang, Wei Huang, Haibo Chen, Yanshan Gao*, Tobin J. Marks

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Polar functionalized isotactic and syndiotactic polypropylenes (PPs) are synthesized by direct, masking-reagent-free propylene and amino–olefin (AO, CH2=CH(CH2)xNnPr2, x=2, 3, 6) copolymerizations using the activated precatalysts rac-[Me2Si(indenyl)2]ZrMe2 and [Me2C(Cp)(fluorenyl)]ZrMe2, respectively. Polymerization activities at 25 °C are as high as 4208 and 535 kg/(mol h atm) with AO incorporation up to 4.0 mol % and 1.6 mol %, respectively. Remarkably, introducing the amino-olefin comonomers significantly enhances stereoselection for both isotactic (mmmm: 59.5 %→91.0 %) and syndiotactic (rrrr: 66.3 %→81.3 %) products.

Original languageEnglish (US)
Pages (from-to)20522-20528
Number of pages7
JournalAngewandte Chemie - International Edition
Volume59
Issue number46
DOIs
StatePublished - Nov 9 2020

Keywords

  • copolymerization
  • monomers
  • polymers
  • synthetic methods
  • zirconium

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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