Organizations in supramolecular polymers: from the solution to the bulk behavior

Abstract : We have studied, in solution and in the bulk, a model system consisting of noncrystalline poly(propylene oxide) (PPO) chains end-functionalized with complementary stickers: thymine derivative (Thy) and diaminotrozaine (DAT). This system combines weak (Thy/Thy and DAT/DAT self-associations) and strong (Thy/DAT complementary association) hydrogen bonding, aromaticity of the stickers, strong repulsion between the polar stickers and the PPO spacers, and very different tendency towards crystallization for Thy and DAT. Homoditopic and heteroditopic compounds were synthesized. In solution, the solvent influences the association constants and the organizations observed. In the bulk, all materials show a relatively complex behavior, as three different phenomena concur and compete: hydrogen bonding between the stickers, phase segregation between the polymer backbone (less polar) and the stickers (more polar), and crystallization of thymines into microdomains. These phenomena impact the mesoscopic organization of the materials and thus their mechanical properties. We present the different organizations observed in solution and in the bulk and discuss the new insight our studies bring for understanding the role played respectively by hydrogen bonding, phase segregation, solvation and crystallization.
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Contributor : Jessalyn Cortese <>
Submitted on : Monday, April 15, 2013 - 11:44:22 PM
Last modification on : Thursday, July 4, 2019 - 11:00:05 AM
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  • HAL Id : pastel-00813603, version 1

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Jessalyn Cortese. Organizations in supramolecular polymers: from the solution to the bulk behavior. Polymers. Université Pierre et Marie Curie - Paris VI, 2013. English. ⟨pastel-00813603⟩

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