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.