10.1021/ja104446r.s001
Stefano Burattini
Stefano
Burattini
Barnaby W. Greenland
Barnaby W.
Greenland
Daniel Hermida Merino
Daniel Hermida
Merino
Wengui Weng
Wengui
Weng
Jonathan Seppala
Jonathan
Seppala
Howard M. Colquhoun
Howard M.
Colquhoun
Wayne Hayes
Wayne
Hayes
Michael E. Mackay
Michael E.
Mackay
Ian W. Hamley
Ian W.
Hamley
Stuart J. Rowan
Stuart J.
Rowan
A Healable Supramolecular Polymer Blend Based on Aromatic π−π Stacking and Hydrogen-Bonding Interactions
American Chemical Society
2010
bulk material
modulu
FTIR
cooling cycles
telechelic polyurethane
interpolymer interaction
healable
SAXS
elastomeric material
domain increases
supramolecular polymer blend
analysis
Healable Supramolecular Polymer
pyrenyl end groups
2010-09-01 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/A_Healable_Supramolecular_Polymer_Blend_Based_on_Aromatic__Stacking_and_Hydrogen_Bonding_Interactions/2737879
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 <i>increases</i> 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.