Burattini, Stefano, Greenland, Barnaby W, Hermida Merino, Daniel, Weng, Wengui, Seppala, Jonathan, Colquhoun, Howard M, Hayes, Wayne, Mackay, Michael E, Hamley, Ian W and Rowan, Stuart J (2010) A healable supramolecular polymer blend based on aromatic π-π stacking and hydrogen-bonding interactions. Journal of the American Chemical Society, 132 (34). pp. 12051-12058. ISSN 0002-7863

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Abstract

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.

Item Type:	Article
Schools and Departments:	School of Life Sciences > Chemistry
Subjects:	Q Science > QD Chemistry
Depositing User:	Barnaby Greenland
Date Deposited:	19 Apr 2018 09:59
Last Modified:	20 Feb 2019 11:30
URI:	http://sro.sussex.ac.uk/id/eprint/75192

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