Synthesis and Self-Assembly of Well-Defined Star and Tadpole Homo-/Co-/Terpolymers

G. Polymeropoulos, P. Bilalis, X. Feng, E.L. Thomas, Y. Gnanou, N. Hadjichristidis
ACS Macromolecules, 52, 15, pp. 5583-5589, (2019)

Synthesis and Self-Assembly of Well-Defined Star and Tadpole Homo-/Co-/Terpolymers

Keywords

Polymers, Molecular topology

Abstract

​Tadpole polymers are excellent candidates to explore how architecture can influence self-assembly because they combine two topologies in the same molecule (ring polymer as the head and linear polymer as the tail). In this work, we synthesize well-defined tadpole homo-/co-/terpolymers derived from the appropriate chemical modification reactions of the corresponding 3-miktoarm star homo-/co-/terpolymers via anionic polymerization, high vacuum techniques, and chlorosilane chemistry in combination with the Glaser coupling reaction. The 3-miktoarm star homo-/co-/terpolymers bear two arms with t-butyl dimethylsiloxypropyl functional end-groups, whereas after deprotection, the ω-hydroxyl chain-ends were modified to alkyne moieties. The dialkyne star polymers in the presence of Cu(I)Br and N,N,N′,N″,N″-pentamethyldiethylenetriamine were then transformed to well-defined tadpole homo-/co-/terpolymers. We employed strongly immiscible blocks to enable characterization using electron microscopy and X-ray scattering to explore how the molecular topology influences the self-assembled bulk-state microdomain morphologies.

Code

DOI: 10.1021/acs.macromol.9b01013

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