中国塑料 ›› 2024, Vol. 38 ›› Issue (11): 14-20.DOI: 10.19491/j.issn.1001-9278.2024.11.003

• 材料与性能 • 上一篇    下一篇

环氧基聚硅氧烷调控制备耐水解结晶聚乙交酯的研究

闻薇1, 公维光2, 孟鑫1()   

  1. 1.华东理工大学化工学院产品工程系,上海市多相结构材料化学工程重点实验室,上海 200237
    2.华东理工大学体育新材料研发中心,上海 200237
  • 收稿日期:2024-02-23 出版日期:2024-11-26 发布日期:2024-11-21
  • 通讯作者: 孟鑫(1978—),女,副教授,从事基于添加剂和聚合物拓扑结构设计的降解材料性能调控,mengxin@ecust.edu.cn
    E-mail:mengxin@ecust.edu.cn

Controllable preparation of hydrolysis⁃resistant crystalline poly(glycolic acid) using poly(epoxypropoxy) silsesquioxane

WEN Wei1, GONG Weiguang2, MENG Xin1()   

  1. 1.Shanghai Key Laboratory of Multiphase Materials Chemical Enigneering,Production Engineering Department,School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China
    2.Research & Development Center for Sports Materials,East China University of Science and Technology,Shanghai 200237,China
  • Received:2024-02-23 Online:2024-11-26 Published:2024-11-21
  • Contact: MENG Xin E-mail:mengxin@ecust.edu.cn

摘要:

设计合成了环氧基取代的聚硅氧烷(PESQ),以0.5 %,1.0 %,2.0 %及4.0 %(质量分数,下同)的浓度与聚乙交酯(PGA)熔融混合,通过对PESQ改性PGA的流变性能、水解性能及结晶性能进行表征,揭示了PESQ改性对PGA带来的影响。结果表明,PESQ以扩链的形式与PGA进行结合,提高PGA复黏度的同时促使其疏水性能的提升,进而改善PGA的水解性能,使得其水解10 d之后的质量损失下降21.1 %。此外,PESQ还能促进PGA的结晶,随着PESQ添加量的增加,PGA的结晶温度最高可增至179.5 ℃,相比于纯PGA的结晶温度172.7 ℃提升了6.8 ℃,并且结晶初期的活化能降低,说明PESQ起到了异相成核的作用。

关键词: 聚乙交酯, 环氧基聚硅氧烷, 水解性能, 结晶性能

Abstract:

Poly(epoxypropoxy) silsesquioxane (PESQ) was designed and synthesized and then melt blended with poly(glycolic acid) (PGA) at loadings of 0.5 wt%, 1.0 wt%, 2.0 wt% and 4.0 wt% to prepare the hydrolysis⁃resistant crystalline PGA. The changes in the rheological, hydrolysis, and crystallization properties of the PESQ⁃modified PGA was investigated to study the effect of PESQ modification on PGA. The results indicated that a combination of PESQ and PGA in a chain expansion form effectively improved the hydrolytic performance of PGA through increasing its viscosity, resulting in a reduction in the mass loss by 21.1 % after degrading for 10 days. Furthermore, PESQ could facilitate the crystallization of PGA. With an increase in the addition amount of PESQ, the crystallization temperature of the modified PGA increased to 179.5 ℃, which was higher than that of pure PGA by 6.8 ℃. There is a decrease in the initial crystallization activation energy of the modified PGA, indicating that PESQ contributed to heterogenous nucleation.

Key words: poly(glycolic acid), poly(epoxypropoxy) silsesquioxane, hydrolytic property, crystallization property

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