Supramolecular Polymer Materials: Chain Extension of Telechelic Polymers Using a Reactive Hydrogen-Bonding Synthon

A toolbox of oligopeptide-modified polymers for tailored elastomers

“…D2 was already a brittle hard solid (G 0 ¼ 2 MPa) and the higher homologues could not even be investigated by shear rheology anymore. Although the general notion of a mechanical reinforcement is certainly well in line with previous reports on supramolecular networks 32,35 , including modified PIBs 36-39 , the observed drastic dependence of aggregation behaviour and mechanical properties on the number of hydrogen-bonding sites allowed for further tailoring of the materials' thermomechanical properties. To this end, binary blends of monofunctional and difunctional derivatives with 'matching' oligopeptide segments were found to give rise to supramolecular networks that were 'inherently reinforced' by the incorporated b-sheet aggregates.…”

“…However, the thermomechanical properties of the corresponding bulk materials have rarely been studied in much detail [29][30][31] . Supramolecular materials from polymers with other types of hydrogen-bonded end groups have frequently been used to obtain thermoplastic elastomers with superior processing behaviour at elevated temperatures [32][33][34][35][36][37][38][39] . In these materials, network formation by non-covalent interactions allows for dynamic reorganization processes, which is relevant for selfhealing or thermoresponsive materials 40,41 .…”

“…To this end, we investigate a series of novel supramolecular materials from mixtures of oligopeptide-modified and unmodified poly(isobutylene)s (PIBs). Extending on previous examples of supramolecular networks [32][33][34][35][36][37][38][39] , these materials show an additional formation of defined nanostructures. The length-dependent aggregation of the oligopeptides results in the formation of either small hydrogenbonded aggregates that serve as physical cross-links in the material, or mixtures of single b-sheet tapes and stacked b-sheet nanofibrils that provide a secondary network and serve as a reinforcement (Fig.…”

Effect of stoichiometry on liquid crystalline supramolecular polymers formed with complementary nucleobase pair interactions

“…In particular, motifs that rely on either hydrogen bonding [4][5][6] or metal/ligand interactions 7 have been designed and utilized successfully in the preparation of supramolecular materials. [8][9][10][11][12][13][14][15][16] The dynamic nature of the polymerization/depolymerization process confers unusual mechanical properties on such materials. Anything that affects either the degree of interaction between the binding motifs and/or the monomer concentration will drastically alter the DP of the material, and consequently, the properties of these \dynamic" polymers should be very sensitive to environmental conditions.…”

Ureidobenzotriazine Multiple H-Bonding Arrays: The Importance of Geometrical Details on the Stability of H-Bonds

“…[13][14][15][16][17] In particular, strongly associating self-complementary molecules developed by our group have been of † eminent importance for the development of main-chain supramolecular polymers. [18][19][20][21][22] However, the self-complementarity of these units imposes restrictions to the self-assembly of copolymers and the construction of supramolecular architectures consisting of more than one compound. Given our research interest in multiple hydrogen-bonding units as well as the recent use of complementary recognition motifs in supramolecular polymers, there is a clear need for strong complementary binding motifs.…”