聚对二氧杂环己烷酮的化学合成

背景:聚对二氧杂环己烷酮是脂肪族聚酯的一种,具有优异的生物降解性,独特的醚键还使其具有良好的柔韧性。目的:化学合成聚对二氧杂环己烷酮及最佳条件的探索。方法:以辛酸亚锡作为催化剂,催化对二氧环己酮单体的本体熔融开环聚合,从而合成聚对二氧杂环己烷酮均聚物。以温度、反应时间为正交条件,设计80,100,140℃三个温度,和10,20,30h三个反应时间,考察温度和反应时间对均聚物的合成效果的影响。结果与结论:以辛酸亚锡为催化剂,催化对二氧环己酮单体的本体熔融开环聚合,成功合成了聚对二氧杂环己烷酮均聚物。从合成出的聚对二氧杂环己烷酮的单体转化率的角度来说,聚合反应最优条件为:反应温度100℃,反应时间20h。

Synthesis of poly(p-dioxanone)

BACKGROUND:Poly(p-dioxanone), as an aliphatic polyester, has its special characters comparing with other aliphatic polyesters. Except for its ultimate biodegradability due to the existence of ester bonds in polymer chains, the unique ether bonds endue it with good flexibility. OBJECTIVE:To explore the optimal conditions for chemical synthesis of poly(p-dioxanone). METHODS:Poly(p-dioxanone) was synthesized by ring-opening polymerization of p-dioxanone using stannous octoate as catalyst in bulk at 80, 100 and 140 ℃ for 10, 20 and 30 hours. Temperature and reaction time effects on the synthesis of homopolymers were observed. RESULTS AND CONCLUSION:The aliphatic homopolymer poly(p-dioxanone) is successfully synthesized by ring-opening polymerization of p-dioxanone using stannous octoate as catalyst in bulk. Based on the monomer conversion rate, the optimal conditions for the synthesis of homopolymers are 100 ℃ for reaction temperature and 20 hours for reaction time.