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Inverse Vulcanization of Styrylethyltrimethoxysilane–Coated Surfaces, Particles, and Crosslinked Materials
Author(s) -
Scheiger Johannes M.,
Direksilp Chatrawee,
Falkenstein Patricia,
Welle Alexander,
Koenig Meike,
Heissler Stefan,
Matysik Jörg,
Levkin Pavel A.,
Theato Patrick
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202006522
Subject(s) - vulcanization , sulfur , condensation polymer , silane , polymer , materials science , hydrolysis , polymer chemistry , organic chemistry , chemistry , chemical engineering , natural rubber , engineering
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 materials formed are of limited applicability, because they need to be cured at high temperatures (>130 °C) for many hours. Herein, we report the reaction of elemental sulfur with styrylethyltrimethoxysilane. 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(S n ‐ 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 Hg 2+ ion remediation capability.