File(s) not publicly available
A healable supramolecular polymer blend based on aromatic p-p stacking and hydrogen-bonding interactions
journal contribution
posted on 2023-06-09, 12:55 authored by Stefano Burattini, Barnaby GreenlandBarnaby Greenland, Daniel Hermida Merino, Wengui Weng, Jonathan Seppala, Howard M Colquhoun, Wayne Hayes, Michael E Mackay, Ian W Hamley, Stuart J RowanAn elastomeric, healable, supramolecular polymer blend comprising a chain-folding polyimide and a telechelic polyurethane with pyrenyl end groups is compatibilized by aromatic p-p stacking between the p-electron-deficient diimide groups and the p-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 p-p 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.
History
Publication status
- Published
Journal
Journal of the American Chemical SocietyISSN
0002-7863Publisher
American Chemical SocietyExternal DOI
Issue
34Volume
132Page range
12051-12058Department affiliated with
- Chemistry Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2018-04-19Usage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC