A healable supramolecular polymer blend based on aromatic π-π Stacking and hydrogen-bonding interactions

Stefano Burattini, Barnaby W. Greenland, Daniel Hermida Merino, Wengui Weng, Jonathan Seppala, Howard M. Colquhoun, Wayne Hayes, Michael E. MacKay, Ian W. Hamley, Stuart J. Rowan

研究成果: Article査読

615 被引用数 (Scopus)

抄録

An elastomeric, healable, supramolecular polymer blend comprising a chain-folding polyimide and a telechelic polyurethane with pyrenyl end groups is compatibilized by aromatic π-π stacking between the π-electron- deficient diimide groups and the π-electron-rich pyrenyl units. This interpolymer interaction is the key to forming a tough, healable, elastomeric material. Variable-temperature FTIR analysis of the bulk material also conclusively demonstrates the presence of hydrogen bonding, which complements the π-π stacking interactions. Variable-temperature SAXS analysis shows that the healable polymeric blend has a nanophase-separated morphology and that the X-ray contrast between the two types of domain increases with increasing temperature, a feature that is repeatable over several heating and cooling cycles. A fractured sample of this material reproducibly regains more than 95% of the tensile modulus, 91% of the elongation to break, and 77% of the modulus of toughness of the pristine material.

本文言語English
ページ(範囲)12051-12058
ページ数8
ジャーナルJournal of the American Chemical Society
132
34
DOI
出版ステータスPublished - 2010 9月 1
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 触媒
  • 生化学
  • コロイド化学および表面化学

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