Constitutive theory for mechanochemically-based energy dissipating elastomer

Abstract eng:
Mechanochemically responsive polymers can be designed through the incorporation of mechanophores, molecular groups with a tailored productive response to applied force. Here we present the design and corresponding constitutive theory for an elastomer that dissipates mechanical energy through the incorporation of length unveiling mechanophores. These mechanophores activate as the elastomer approaches its finite extensibility, but prior to chain scission. The reversible release of contour length temporarily increases the failure strain of the polymer chains subjected to the largest local force. The behavior of the model will be presented for monotonic, cyclic, and stress relaxation loading. Required mechanophore energetics and characteristic recovery times will be discussed.

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