Crosslinked polymers (CLPs) exhibit exceptional mechanical properties as well as good chemical and solvent resistance. However, their reprocessing, recycling, and modification remain difficult. One promising approach to overcome this limitation is to introduce dynamic covalent bonds that enable chain-exchange reactions and network-structure rearrangements in identical polymer networks (A-A fusion), resulting in self-healing and reprocessing properties. Reported here is the fusion of two distinct polymer networks (A-B fusion) by the dynamic behavior of bis(2,2,6,6-tetramethylpiperidin-1-yl)disulfide (BiTEMPS) at the interface between different CLPs. The appearance, swelling behavior, and mechanical properties of the fused samples indicate exchange reactions of the BiTEMPS units and the formation of topological bonds at the interface, commensurate with the generation of a CLP that exhibits tunable properties.

中文翻译：

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基于动态二硫键交换的不同交联聚合物的融合。

交联聚合物（CLP）具有出色的机械性能以及良好的耐化学性和耐溶剂性。但是，它们的后处理，回收和修改仍然很困难。克服这一局限性的一种有前途的方法是引入动态共价键，该键使链交换反应和网络结构重排能够在相同的聚合物网络中进行（AA融合），从而实现自我修复和后处理性能。这里报道的是两个不同的聚合物网络的融合（AB融合），其通过在不同CLP之间的界面上的双（2,2,6,6-四甲基哌啶-1-基）二硫键（BiTEMPS）的动态行为。熔融样品的外观，溶胀行为和力学性能表明BiTEMPS单元的交换反应和界面处拓扑键的形成，