Acta Chimica Sinica ›› 2010, Vol. 68 ›› Issue (21): 2243-2249. Previous Articles     Next Articles

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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

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