Although considerable progress has been made in developing vitrimers, on-going challenges for vitrimers for high-performance applications include the improvement in mechanical properties and identification of more efficient exchange reactions. By incorporation of glycidyl polyhedral oligomeric silsesquioxane (POSS) as a nanoscale filler in epoxy, we produced epoxy-POSS nanocomposite vitrimers that show high strength, toughness, thermal stability, and efficient relaxation. With 10 wt% POSS, the ultimate tensile strength and strain at break of the epoxy-POSS nanocomposite vitrimers increased by ~64% and ~76%, respectively, while at 160 °C the stress relaxation time increased by ~260% in comparison to that of pure epoxy vitrimer. The epoxy-POSS nanocomposite vitrimers show high malleability due to the efficient transesterification reaction and re-processability with little degradation of their initial mechanical properties, suggesting opportunities for sustainable plastics.

尽管在开发微粉化玻璃方面已经取得了长足的进步，但高性能应用的微粉化技术仍面临着挑战，包括机械性能的提高和更有效的交换反应的鉴定。通过将缩水甘油基多面体低聚倍半硅氧烷（POSS）掺入环氧树脂中作为纳米级填料，我们生产出了具有高强度，韧性，热稳定性和有效松弛度的环氧-POSS纳米复合微晶玻璃。使用10 wt％的POSS时，环氧-POSS纳米复合微粉聚合物的极限拉伸强度和断裂应变分别增加了〜64％和〜76％，而在160°C时，应力松弛时间相比则增加了〜260％。纯环氧玻璃陶瓷。