抄録
Thermal latent curing agents are very important industrially because they can cure epoxy resins at a set temperature and can be stored as one-component systems. However, it remains difficult to achieve both a long pot life and high reaction efficiency. Herein, we present a dual-locked thermal latent curing agent based on aminopyridines, protected by amidation and N-oxidation, designed to enhance both pot life and final curing efficiency. We demonstrated that this dual-locked aminopyridine undergoes stepwise deprotection during the epoxy curing process, as evidenced by 1H NMR and MALDI-TOF MS analyses of model epoxy polymerizations. The curing temperature of epoxy resin with the dual-locked aminopyridines was modifiable within the range 120-154 °C, influenced by the electron density on the N-oxide. Furthermore, the dual-lock strategy was found to significantly improve the storage stability of one-component epoxy resins and promote the curing of epoxy with high efficiency compared to unprotected aminopyridines.
| 本文言語 | English |
|---|---|
| ページ（範囲） | 2870-2878 |
| ページ数 | 9 |
| ジャーナル | Macromolecules |
| 巻 | 58 |
| 号 | 6 |
| DOI | |
| 出版ステータス | Published - 25 3月 2025 |