Strategically designed robust thio-urethane vitrimer through physically dual cross-links
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According to the mechanism of dynamic bond exchange, Covalent Adaptable Network (CAN) is divided into associative type (Vitrimer) and dissociative type. Thio-urethane can be capable of both associative and dissociative CANs depending on the content of thiol. In this research, We characterized stress relaxation of thiourethane vitrimer with dynamic mechanical analysis (DMA). Tailoring the thiol contents, thiourethane vitrimer showed excellent reprocessability after multiple recycling steps. In addition, the young’s modulus was improved from 3.1Mpa to 220.4Mpa through physically dual cross-links.