Abstract
Mechanical properties of healable supramolecular polymer blends correlate to non-covalent “crosslink density”.
Highlights
Polymers with the ability to repair themselves a er damage[1,2,3,4,5,6,7,8] could be used in a variety of applications to extend the lifetime of the material
The properties of supramolecular polymer blends in which the two components associate through complementary aromatic p–p stacking interactions can be controlled by varying the valency of one of the components, leading to a clear relationship between the supramolecular “cross-link density” of the blend and its solution and solid state properties
Spectroscopic analyses of the divalent and trivalent polymer blends enabled the density of p–p stacking interactions within the supramolecular polymer network to be correlated with the change in valency
Summary
Polymers with the ability to repair themselves a er damage[1,2,3,4,5,6,7,8] could be used in a variety of applications to extend the lifetime of the material. Our previous work has focused on a two component polymer blend which is able to self-assemble through p–p stacking interactions between a p-electron-de cient chain-folding[59,60,61,62,63,64] diimide residue and a p-electron-rich pyrenyl moiety (Scheme 1). Insert shows the atomistic structure of the p–p stacked complex[54] with p-electron-rich pyrenyl end-groups (red) and p-electron-deficient naphthalene diimide units (blue) linked by an appropriate spacer to form a chain-folding residue.
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