Combination of high thermal stability and recyclability

Scientists from North University of China have developed a novel bio-based benzoxazine resin that offers both high thermal stability and recyclability. The researchers utilized a strategy combining rigid conjugated dynamic dihydrazone bonds with bio-based components. The resin is synthesized from bio-vanillin and hydrazine hydrate and demonstrates thermal stability comparable to petroleum-based alternatives, with a char yield of 59.5 % at 800 °C. At the same time, the incorporated acid-labile dynamic bonds enable controlled degradation under various conditions. In carbon fiber composites, 96 % of the original fiber strength was retained after 24 hours of resin decomposition. This development represents an important step toward sustainable high-performance materials.

Source: Polymer Chemistry, 2025,16, 3296-3309

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