Vitrimers are a new type of cross-linked material showing sustainable functions due to the associative bond exchange nature. In this study, we explore one-shot transformation of ordinary polyesters into vitrimers by only heating the mixture of a polyester, tetra-epoxy compound, and trans-esterification catalyst, where the original polyester does not bear any reactive groups initially. Detailed analyses reveal that three distinct steps of hydrolysis, epoxy-opening, and trans-esterification reactions are involved in the present cross-linking mechanism, which is thus much different from the conventional cross-linking reaction. Consequently, a fully cross-linked vitrimer with a gel fraction of about 100% was obtained.

中文翻译：

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普通聚酯一次性转化为玻璃体：分解引发的交联和动态共价键的辅助

Vitrimers 是一种新型交联材料，由于缔合键交换性质，显示出可持续的功能。在这项研究中，我们通过仅加热聚酯、四环氧化合物和酯交换催化剂的混合物来探索普通聚酯向玻璃体的一次性转化，其中原始聚酯最初不带有任何反应性基团。详细分析表明，目前的交联机制涉及水解、环氧开环和酯交换反应三个不同的步骤，因此与传统的交联反应有很大不同。因此，获得了具有约100％的凝胶分数的完全交联的vitrimer。