中国塑料 ›› 2024, Vol. 38 ›› Issue (8): 13-19.DOI: 10.19491/j.issn.1001-9278.2024.08.003

• 材料与性能 • 上一篇    下一篇

聚乙醇酸高温降解性能研究及其调控方法

王兴国(), 吕明福, 黄逸伦, 郭鹏, 高达利, 张师军   

  1. 中石化(北京)化工研究院有限公司,北京 100013
  • 收稿日期:2023-12-12 出版日期:2024-08-26 发布日期:2024-08-19
  • 作者简介:王兴国(1994—),男,副研究员,从事可降解材料、塑料改性研究,wangxg.bjhy@sinopec.com

Study on high temperature degradation performance of poly (glycolic acid) and its regulation method

WANG Xingguo(), LV Mingfu, HUANG Yilun, GUO Peng, GAO Dali, ZHANG Shijun   

  1. Sinopec (Beijing) Research Institute of Chemical Industry Co,Ltd,Beijing 100013,China
  • Received:2023-12-12 Online:2024-08-26 Published:2024-08-19

摘要:

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。

关键词: 聚乙醇酸, 降解性能, 降解机理, 扩链剂, 抗水解剂

Abstract:

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 thermal 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.

Key words: poly(glycolic acid), degradation performance, degradation mechanism, anti?hydrolysis, chain extender

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