Designing Dynamic Materials from Dynamic Bonds to Macromolecular Architecture

Dynamic polymer materials have characteristic bond exchange behavior, which can be autonomous or in response to external stimuli. Bond dynamic enables numerous applications and enhancement of the material properties. Beyond precise chemistries, architectural features polymers also play a vital role governing Polymer chain characteristics, crosslink density distribution, shapes are key features. These impact thermomechanical properties materials, including strength, phase transition macroscopic flow temperatures, creep relaxation among others. New developments control over inspired new avenues design powerful with advanced Introducing exchangeable bonds breathe life into by imparting self-healing, enhanced toughness, adaptability material. Synergies between polymer’s facilitate pathways tune material’s thermal mechanical In recent years, chemistries variations been used develop superior materials. This article highlights diversity architectures polymers, focus on how interplay architecture Finally, this judicious choice could realize crosslinked containing covalent bonds, enabling adapt reprocessed under appropriate conditions. gradual shape deformation strain constant applied stress. that contain interchange either autonomically stimulus. analysis measure as function strain, temperature, frequency. simple relates molecular weight their glass temperatures using Flory-Fox equation proposed Paul J. Flory 1950. temperature range where substrate changes its state from rigid, glassy stage flexible, rubbery stage. distribution weights present sample. storage moduli lower frequency region above temperature. dissipation load stress time at strain. network becomes effectively frozen nondynamic for recycling vitrimer class networks consisting thermosetting similarly behaving change topology thermally activated reactions.