Well-Defined Cyclic Triblock Terpolymers: A Missing Piece of the Morphology Puzzle

George Polymeropoulos, Panagiotis Bilalis, Nikos Hadjichristidis

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20 Scopus citations

Abstract

Two well-defined cyclic triblock terpolymers, missing pieces of the terpolymer morphology puzzle, consisting of poly(isoprene), polystyrene, and poly(2-vinylpyridine), were synthesized by combining the Glaser coupling reaction with anionic polymerization. An α,ω-dihydroxy linear triblock terpolymer (OH-PI1,4-b-PS-b-P2VP-OH) was first synthesized followed by transformation of the OH to alkyne groups by esterification with pentynoic acid and cyclization by Glaser coupling. The size exclusion chromatography (SEC) trace of the linear terpolymer precursor was shifted to lower elution time after cyclization, indicating the successful synthesis of the cyclic terpolymer. Additionally, the SEC trace of the cyclic terpolymer produced, after cleavage of the ester groups, shifted again practically to the position corresponding to the linear precursor. The first exploratory results on morphology showed the tremendous influence of the cyclic structure on the morphology of terpolymers. © 2016 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)1242-1246
Number of pages5
JournalACS Macro Letters
Volume5
Issue number11
DOIs
StatePublished - Oct 27 2016

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