| 초록 |
Poly(bisphenol A carbonate) (PC) is a leading engineering plastic having high heat and impact resistance and transparency. Annually, over 5 million tons PC is consumed. However, the attention of its recycling has not been given despite environmental concerns of bisphenol A. Most of waste PC goes to landfill, its chemical degradation and monomer recovery have been studied, called chemical recycling. While the recovery of bisphenol A was a primary goal, the leftover carbonyl moiety still can be a valuable in carbonylation reactions. We have developed an efficient synthetic protocol of 1,4,2-dioxazolones beginning from hydroxamic acid and PC. With a proper organic catalyst, the waste PC was degraded into bisphenol A and the corresponding 1,4,2-dioxazolones, quantitatively. The details of condition optimization, scope, and utilization will be disclosed. |
