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化学学报
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化学学报 ›› 2010, Vol. 68 ›› Issue (21): 2243-2249. 上一篇    下一篇

研究论文

形状记忆聚(乳酸-乙醇酸)(PLLGA)的制备及性能研究

董文进1，姜继森*,1，谢美然2   

  1. (1华东师范大学物理系 纳米功能材料与器件应用研究中心 上海 200241)
    (2华东师范大学化学系 上海 200062)
  • 投稿日期:2010-03-30 修回日期:2010-07-08 发布日期:2010-07-13
  • 通讯作者: 姜继森 E-mail:jsjiang@phy.ecnu.edu.cn
  • 基金资助:

    上海市科委纳米专项基金

Preparation and Properties of Shape Memory Poly(l-lactic-co-glycolic acid) (PLLGA)

Dong Wenjin1 Jiang Jisen*,1 Xie Meiran2   

  1. (1 Department of Physics, Center of Functional Nanomaterials and Devices, East China Normal University, Shanghai 200241)
    (2 Department of Chemistry, East China Normal University, Shanghai 200062)
  • Received:2010-03-30 Revised:2010-07-08 Published:2010-07-13
  • Contact: Ji-Sen Jiang E-mail:jsjiang@phy.ecnu.edu.cn

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1639

被引次数

5

采用开环聚合法合成了一系列具有不同组成的聚(乳酸-乙醇酸)(PLLGA)共聚物, 并通过红外光谱(FT-IR)、核磁共振氢谱(1H NMR)、凝胶渗透色谱(GPC)、差示扫描量热分析(DSC)、X射线衍射分析(XRD)和拉伸试验, 对PLLGA共聚物的化学结构、相结构、热性能、力学性能和形状记忆性能进行了系统研究, 并分析了其形状记忆效应的微观机理. 研究表明, 通过调整PLLGA共聚物的组成, 可获得良好的力学性能和形状记忆效应. 对PLLGA90/10和80/20, 由结晶部分及大分子链之间的缠结点共同作为固定相, 无定型部分作为可逆相. 而对PLLGA70/30和60/40, 仅由大分子链之间的缠结点作为固定相, 其无定型部分均作为可逆相. 综合而言, PLLGA80/20具有最好的形状记忆效应.

关键词: 聚(乳酸-乙醇酸), 相结构, 力学性能, 形状记忆效应

A series of poly(l-lactic-co-glycolic acid) (PLLGA) with different compositions was synthesized by ring opening copolymerization. The chemical structure, phase structure, thermal property, mechanical property and shape memory property of PLLGA were investigated through FT-IR, 1H NMR, GPC, DSC, XRD and tensile tests, and the shape memory microscopic mechanisms were analyzed. The results showed that good mechanical and shape memory properties can be obtained through changing of PLLGA compositions. For PLLGA90/10 and 80/20, the fixed phase was acted by their crystals and the entanglements of molecular chains, while the reversible phase was acted by their amorphous phase. However, for PLLGA 70/30 and 60/40, the fixed phase was only acted by the entanglements of molecular chains. In general, the best shape memory properties were showed by PLLGA 80/20.

Key words: poly(l-lactic-co-glycolic acid), phase structure, mechanical property, shape memory behaviour