A supramolecular polymer based on tweezer-type π?π stacking interactions: Molecular design for healability and enhanced toughness

Stefano Burattini, Barnaby W. Greenland, Wayne Hayes, Michael E. MacKay, Stuart J. Rowan, Howard M. Colquhoun

Research output: Contribution to journalArticle

141 Citations (Scopus)

Abstract

A new polyamide with tweezer-type dipyrenyl end-groups was successfully synthesized. The new material differs from a related but mechanically much weaker blend solely in the strength of specified supramolecular interactions between the components, rather than in the chain-structures of the polymers themselves. The synthesis of polyamine involved reaction of Jeffamine 400 with isophthaloyl dichloride in the presence of ca. 20 mol% of the aminomethyl-substituted tweezer-molecue to end-cap the chains and control the degree of polymerization. The MALDI-ToF mass spectrum of polyamide exhibited well resolved signals consistent with the production of bis end-capped chains containing up to three Jeffamine 400 segments. The new material differs from a related but mechanically much weaker blend solely in the strength of specified supramolecular interactions between the components, rather than in the chain-structures of the polymers themselves. The results show that blend has an enhanced ultimate tensile strength and greatly increased modulus of toughness and elongation.

Original languageEnglish
Pages (from-to)6-8
Number of pages3
JournalChemistry of Materials
Volume23
Issue number1
DOIs
Publication statusPublished - 2011 Jan 11
Externally publishedYes

ASJC Scopus subject areas

  • Materials Chemistry
  • Chemical Engineering(all)
  • Chemistry(all)

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