Synthesis and Characterization of Polyamide Vitrimer from Commercial Nylon 6 and Its Application for High-Temperature Triple Shape Memory Polymer
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Thermoset polymers generally exhibit superior chemical and thermal resistance compared to thermoplastics but are difficult to recycle. Vitrimers, which consist of a dynamic covalent crosslinked network, offer recycling properties unlike traditional thermosets. In this study, we synthesized semi-crystalline polyamide vitrimers (PAVs) from commercial nylon 6 through solid-state polymerization. The crosslinked network was formed using sebacic acid and tris(2-aminoethyl)amine, with Sc(OTf)3 serving as a transamidation catalyst. The synthesized PAVs were applied to high-temperature triple shape memory polymers, capable of changing their permanent shape due to dynamic covalent bonds. We anticipate that this study will pave the way for further research on polyamide vitrimers for various applications.