Fig. 8: Chemical recycling and repolymerization of epoxy supramolecular thermosets.

a Closed-loop mechanism of EN-VanEHBP7. b ¹³C NMR spectra of the original, chemically recycled and liquid-state depolymerized EN-VanEHBP7. All spectra were performed on an 100 MHz solid-state NMR spectrometer. c Real-time ¹H NMR spectrum of the EN-VanEHBP7 degradation solution with 0.1 M HCl and DMF at room temperature in the mixture of DMSO-d₆. d Tensile curves at room temperature (strain rate: 5 mm·min⁻¹). e, f Storage modulus and tan δ of epoxy supramolecular thermosets before and after chemical recycling (The DMA curves were recorded in the heating scan from 30–130 °C with a heating rate of 5 °C/min and 1 HZ). g Comparisons of the tensile strength and T_g of polymers that can be chemically recycled at room temperature in this work and in previous studies. The error bars represent the standard deviations of the measured values, n = 3 independent samples. Source data are provided in the Source Data file.