Regioselective cross metathesis for block and heterotelechelic polymer synthesis

Madalyn R. Radlauer, Megan E. Matta, Marc A. Hillmyer

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Ring-opening metathesis polymerization (ROMP) of 3-substituted cyclooctene (3RCOE) monomers with Grubbs 2nd and 3rd generation catalysts (G2 and G3) has been shown to occur with high head-to-tail regioregularity and E-stereoregularity. Cross metathesis (CM) between the resultant polymer chains, a secondary metathesis reaction during ROMP, also results in head-to-tail regioregularity and E-stereoregularity. The selectivity of the CM is demonstrated in the reaction between polymers of various molar masses or with different R substituents. In the latter case, monitoring by DSC reveals the change from a multiblock polymer to a statistical copolymer by displaying first two, then one Tg. The regioregularity of both the ROMP and CM reactions is exploited for the synthesis of heterotelechelic polyolefins through the use of an asymmetric, allylically-substituted chain transfer agent alongside the 3RCOE monomer.

Original languageEnglish (US)
Pages (from-to)6269-6278
Number of pages10
JournalPolymer Chemistry
Volume7
Issue number40
DOIs
StatePublished - Oct 28 2016

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Publisher Copyright:
© 2016 The Royal Society of Chemistry.

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  • Period 3

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