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(A) Left: V-T characteristics of an amorphous thermoplastic polymer. Right: At T > Tg, viscosity follows the WLF equation; (B) Left: V-T characteristics of a vitrimer. At T > Tv, bond exchange reactions enable flow. Right: At T > Tv, viscosity follows an Arrhenius equation. Reprinted with permission from Capelot et al. [5].
