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Synthesis of poly(ethylene glycol) block copolymers by a redox process and their spectral characterization

✍ Scribed by Soundappan Nagarajan; Kalathur Sabdham Vangepuram Srinivasan

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
295 KB
Volume
17
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Novel block copolymers of poly(ethylene glycol) (PEG) with acrylamide (AAm) and methacrylic acid (MAA) were synthesized using a redox system consisting of ceric ions and PEG in aqueous acidic medium. The molecular weight of PEG in the redox system was varied to obtain a series of block copolymers with differing molecular weights of PEG segment. The polymerization proceeded via macroradical generation, which was substantiated by ESR spectroscopy. This macroradical acted as a redox macroinitiator for the block copolymerization of the vinyl monomers. The formation of the block copolymers was confirmed by fractional precipitation technique.

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