| 초록 |
Disposal of plastic pollution has attracted considerable attention due to the increasing emphasis on environmental issues. Particularly, in recent years, polyimides (PIs) have been used in flexible electronics. In spite of their excellent properties, PIs have high chemical, weather, and biodegradable resistances, which has been very difficult to decompose PIs as environmental wastes until now. In this study, we will report for the first time that a new diamine and two PIs were designed and synthesized: an camphor-based aromatic diamine (CAD) which has two five-membered ketal rings, and one from 6FDA and TFMB as a reference and the other from a new diamine and 6FDA and TFMB, respectively. The chemical structures of CAD and PIs were characterized by 1H-NMR and FT-IR. In addition, the relative degradation rates of the reference and new PI were investigated by acidic hydrolysis. In conclusion, the newly designed ketal structure of diamine strongly influenced the biodegradability of PI. |
