Change of activation energy of vitrimer bond-exchange reaction according to network structure and multiple dynamic covalent bond
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General thermosetting polymers have better properties than thermoplastic polymers, but are difficult to recycle. A recent study reported a thermoset polymer called vitrimer that can be recycled using a variety of dynamic covalent bonds. Vitrimer is capable of reshaping and self-healing above a certain temperature called topology freezing transition-temperature (Tv). Vitrimer's Tv is known to be affected by the activation energy of the dynamic covalent bond and the structure of the polymer chain. We have seen a dramatic change in activation energy when there are more than two dynamic covalent bonds in the vitrimer and have a specific structure. We present new possibilities in controlling the operating temperature of vitrimer through this study.