Synthesis of water-soluble block copolymers containing a new thermosensitive segment with a terminal redox group and their solution properties

Sayaka Kaino, Satoshi Araki, Michihiro Ogura, Naotaka Nakadan, Hisashi Kokubo, Shinichiro Imabayashi, Masayoshi Watanabe

Research output: Contribution to conferencePaper

Abstract

Block copolymers consisting of a thermosensitive segment, poly(ethyl glycidyl ether), with a terminal redox-active phenothiazine and a hydrophilic segment of PEO were prepared by anionic opening-ring polymerization. The phase transition behavior of an aqueous solution of the block copolymer and its correlation with the redox response of PT group were investigated. The apparent diffusion coefficient of the polymer reveals a maximum at around 15°C, where the thermosensitive segment changes from a coil to a globule. It was shown by the tube-inverted method that a reversible sol-gel transition occurs in the concentration range higher than 35wt%.

Original languageEnglish
Number of pages1
Publication statusPublished - 2005 Dec 1
Event54th SPSJ Annual Meeting 2005 - Yokohama, Japan
Duration: 2005 May 252005 May 27

Conference

Conference54th SPSJ Annual Meeting 2005
CountryJapan
CityYokohama
Period05/5/2505/5/27

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Keywords

  • Micelles
  • Redox response
  • Sol-gel transition
  • Thermosensitive polymers

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Kaino, S., Araki, S., Ogura, M., Nakadan, N., Kokubo, H., Imabayashi, S., & Watanabe, M. (2005). Synthesis of water-soluble block copolymers containing a new thermosensitive segment with a terminal redox group and their solution properties. Paper presented at 54th SPSJ Annual Meeting 2005, Yokohama, Japan.