Institute of Functional Interfaces

Inverse Vulcanization of Styrylethyltrimethoxysilane – Coated Surfaces, Particles and Crosslinked Materials

  • chair:

    Scheiger, J.M. / Direksilp, C. / Falkenstein, P. / Welle, A. / König-Edel, M. / Heissler, S. / Matysik, J. /  Levkin, P. / Theato, P. (2020)

  • place:

    Angewandte Chemie International Edition, 2020, doi.org/10.1002/anie.202006522

  • Date: Juli 2020

Abstract

Sulfur as a side product of natural gas and oil refining is an underused resource. Converting landfilled sulfur waste into materials merges the ecological imperative of resource efficiency with economic considerations. A strategy to convert sulfur into polymeric materials is the inverse vulcanization reaction of sulfur with alkenes. However, the formed materials are of limited applicability, since they need to be cured at high temperatures (> 130 °C) for multiple hours. Herein, the reaction of elemental sulfur with styrylethyltrimethoxysilane is reported. Marrying the inverse vulcanization and silane chemistry yielded high sulfur content polysilanes, which could be cured via room temperature polycondensation to obtain coated surfaces, particles, and crosslinked materials. The polycondensation was triggered by hydrolysis of poly(sulfur‐r‐styrylethyltrimethoxysilane) (poly(Sn‐r‐ StyTMS) under mild conditions (HCl, pH 4). For the first time, an inverse vulcanization polymer could be conveniently coated and mildly cured via post‐polycondensation. Silica microparticles coated with the high sulfur content polymer could improve their Hg2+ ion remediation capability. #

 

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