| 초록 |
Dibutyltin dilaurate (DBDTL) is the most common catalyst for self-healing and urethane reactions. However, since DBTDL is environmentally toxic, many researchers strive to replace it. Zirconium acetylacetonate (Zr(ACAC)4) has been used for transesterification between ester and hydroxyl groups above a certain temperature. In this work, Zr(ACAC)4 and DBTDL are used to compare catalyst effects. Urethane-acrylate prepolymers of poly(GlyMA-MMA-BA) and poly(HEMA-MMA-BA) were synthesized via free-radical polymerization, and crosslinked with HDI trimer in the presence of catalysts. 1H-NMR, IR, viscometry, optical microscopy, and AFM were conducted to study self-healing efficacy of Zr(ACAC)4. |
