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Synthesis and characterization of the novel block copolymer poly(ε-caprolactone)-b-poly(4-vinyl pyridine) by the combination of coordination and controlled free-radical polymerizations

✍ Scribed by Zhongyu Li; Guangqiang Lu; Junlian Huang

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
98 KB
Volume
94
Category
Article
ISSN
0021-8995

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✦ Synopsis

Abstract

A novel block copolymer, poly(ε‐caprolactone)‐b‐poly(4‐vinyl pyridine), was synthesized with a bifunctional initiator strategy. Poly(ε‐caprolactone) prepolymer with a 2,2,6,6‐tetramethylpiperidinyloxy (TEMPO) end group (PCL~T~) was first obtained by coordination polymerization, which showed a controlled mechanism in the process. By means of ultraviolet spectroscopy and electron spin resonance spectroscopy, the TEMPO moiety was determined to be intact in the polymerization. The copolymers were then obtained by the controlled radical polymerization of 4‐vinyl pyridine in the presence of PCL~T~. The desired block copolymers were characterized by gel permeation chromatography, Fourier transform infrared spectroscopy, and NMR spectroscopy in detail. Also, the effects of the molecular weight and concentration of PCL~T~ on the copolymerization were investigated. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 2280–2285, 2004

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