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Synthesis of a Novel Electroactive ABA Triblock Copolymer and its Spontaneous Self-Assembly in Water

✍ Scribed by Lihong Huang; Jun Hu; Le Lang; Xuesi Chen; Yen Wei; Xiabin Jing

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
272 KB
Volume
28
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

An electroactive triblock copolymer of poly(ethylene glycol) (PEG) and aniline pentamer (AP), PEG‐block‐AP‐block‐PEG (PAP), was synthesized via polycondensation in the presence of N,N'‐dicyclohexylcarbodiimide (DCC). The UV‐vis spectra and cyclic‐voltammograms (CV) spectra exhibited an excellent electroactivity of the triblock copolymer. The amphiphilic triblock copolymer self‐assembles spontaneously into uniform micellar aggregates when the triblock copolymer was added directly to the aqueous solution. The size of the aggregates can be changed with the oxidation state of the AP segment in the PAP copolymer and the aggregates were pH‐sensitive to the surrounding water solution, which provides a potential application in controlled drug release.

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