A Subtle End-Group Effect on Macroscopic Physical Gelation of Triblock Copolymer Aqueous Solutions

Authors

  • Lin Yu,

    1. Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China, Fax: (+86) 21-6564-0293
    Search for more papers by this author
  • Huan Zhang,

    1. Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China, Fax: (+86) 21-6564-0293
    Search for more papers by this author
  • Jiandong Ding Prof. Dr.

    1. Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China, Fax: (+86) 21-6564-0293
    Search for more papers by this author

  • We are grateful for the financial support from the NSF of China (20 374 015, 50 533 010, and 20 574 013), the Key Grant of the Chinese Ministry of Education (305 004), 973 Project and 863 Project (2005CB522700) from the Chinese Ministry of Science and Technology, and the Science and Technology Developing Foundation of Shanghai (04JC14019 and 055 207 082).

Abstract

original image

In the end: Alkyl end groups can induce a thermoreversible sol–gel transition in an otherwise sol-like suspension by affecting the macroscopic self-assembly behavior. The picture shows PLGA-PEG-PLGA triblock copolymer/water mixtures in the sol (polymer a), gel (polymers b and c), and precipitation states (polymer d). PLGA=poly(lactic acid-co-glycolic acid), PEG=poly(ethylene glycol).

Ancillary