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Supramolecular Soft Adhesive Materials
Author(s) -
Courtois Jérémie,
Baroudi Imane,
Nouvel Nicolas,
Degrandi Elise,
Pensec Sandrine,
Ducouret Guylaine,
Chanéac Corinne,
Bouteiller Laurent,
Creton Costantino
Publication year - 2010
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200901903
Subject(s) - materials science , small angle x ray scattering , rheology , viscoelasticity , adhesive , supramolecular chemistry , hydrogen bond , supramolecular polymers , polymer , dissipative system , composite material , chemical engineering , polymer chemistry , chemical physics , scattering , crystallography , molecule , thermodynamics , crystal structure , organic chemistry , optics , layer (electronics) , engineering , physics , chemistry
The rheological and adhesive properties of bis‐urea functionalized low‐molecular‐weight polyisobutylenes (PIBUT) are investigated. The polymers, which can interact through supramolecular hydrogen bonds, can self‐organize over times of the order of days at room temperature. This organized structure has been identified by small angle X‐ray scattering (SAXS) and its rheological properties indicate the behaviour of a soft viscoelastic gel. The ordered structure can be disrupted by temperature and shear so that at 80 °C, the material behaves as a highly viscoelastic fluid and no SAXS peak is observed. When cooled back at room temperature, the PIBUT retrieves its ordered structure and gel properties after 20 h of annealing. This very slow molecular dynamics gives PIBUT a highly dissipative nature upon deformation, which combined with strongly interacting moieties results in very interesting adhesive properties both on steel surfaces but more importantly on typical low adhesion surfaces such as silicone. A strategy based on the controlled incorporation of supramolecular bonds in a covalently crosslinked network appears promising for the development of a new generation of highly interacting and dissipative soft adhesives.