This study introduces a novel approach to inverse vulcanization by utilizing a commercially available triaziridine crosslinker as an alternative to conventional olefin‐based crosslinkers. The model reactions reveal a self‐catalyzed ring‐opening of "unactivated" aziridine with elemental sulfur, forming oligosulfide‐functionalized diamines. The triaziridine‐derived polysulfides exhibit impressive mechanical properties, achieving a maximum stress of ~8.3 MPa and an elongation at break of ~107%. The incorporation of silicon dioxide (20 wt%) enhances the composite’s rigidity, yielding a Young's modulus of ~0.94 GPa. Furthermore, these polysulfides display excellent adhesion strength on various substrates, such as aluminum (~7.0 MPa), walnut (~9.6 MPa), and steel (~11.0 MPa), with substantial retention of adhesion strength (~3.3 MPa on steel) at −196 °C. The straightforward synthetic process, combined with the accessibility of the triaziridine crosslinker, emphasizes the potential for further innovations in sulfur polymer chemistry.

中文翻译：

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氮杂环丙啶的反向硫化：增强多硫化物以获得卓越的机械强度和粘合性能


本研究介绍了一种新的反向硫化方法，利用市售的三氮嗪啶交联剂作为传统烯烃基交联剂的替代品。模型反应揭示了“未活化”氮丙啶与元素硫的自催化开环，形成寡硫醚官能化二胺。三氮嗪衍生的多硫化物表现出令人印象深刻的机械性能，最大应力为 ~8.3 MPa，断裂伸长率为 ~107%。二氧化硅 （20 wt%） 的掺入增强了复合材料的刚度，产生了 ~0.94 GPa 的杨氏模量。此外，这些多硫化物在各种基材上表现出优异的粘合强度，例如铝 （~7.0 MPa）、胡桃木 （~9.6 MPa） 和钢 （~11.0 MPa），并且在 -196 °C 下仍能保持相当长的粘合强度（在钢上为 ~3.3 MPa）。 简单的合成工艺，加上三氮嗪啶交联剂的可及性，强调了硫聚合物化学进一步创新的潜力。