聚乙醇酸高温降解性能研究及其调控方法OA北大核心CSTPCD
Study on high temperature degradation performance of poly(glycolic acid)and its regulation method
评价聚乙醇酸(PGA)在不同温度和不同pH环境下的降解性能,研究降解过程中PGA的结晶性能、热稳定性的变化,并通过液相色谱-质谱联用分析PGA的降解产物.随后,分别使用聚碳化二胺类抗水解剂HyMax@210和环氧类扩链剂ADR-6488熔融共混改性PGA,研究2种助剂对PGA的熔体流动性、热稳定性、力学性能和降解性能的影响.结果表明:PGA在高温水溶液中的降解性能远优于传统可降解材料,130℃水中10 h降解完全,降解产物主要为乙醇酸三聚体,提高pH值可促进PGA的降解.扩链剂和抗水解剂的存在提高了PGA的热稳定性和力学性能,延缓了PGA的降解速率.
This work evaluated the degradation property of poly(glycolic acid)(PGA)at different temperature as well as different pH environment.The change of crystallization and thermal stability properties during degradation was studied,and the degradation product of PGA was analyzed by liquid chromatograph-mass spectrometer.Thereafter,PGA was separately modified using anti-hydrolysis agent HyMax@210 and chain extender ADR-6488,and the effects of the two additives on melt fluidity,thermal stability,mechanical properties and degradation performance of PGA were studied.The results indicated that the degradation performance of PGA in high temperature aqueous solution was much better than that of traditional degradable materials.PGA degraded completely at 130℃for 10 h in aqueous solution,and the degradation product was mainly glycolic acid trimers.Increasing pH value promoted the degradation of PGA.The ther-mal stability and mechanical properties of PGA was improved at the present of anti-hydrolysis and chain extender,and the degradation rate of that was delayed.
王兴国;吕明福;黄逸伦;郭鹏;高达利;张师军
中石化(北京)化工研究院有限公司,北京 100013
化学工程
聚乙醇酸降解性能降解机理扩链剂抗水解剂
poly(glycolic acid)degradation performancedegradation mechanismanti-hydrolysischain extender
《中国塑料》 2024 (008)
13-19 / 7
评论