Mechanochemical synthesis of inverse vulcanized polymers

09 May 2022, Version 2
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

Inverse vulcanization, a sustainable platform, can transform an industrial by-product, sulfur, into polymers with broad green applications such as heavy metal capture and recyclable materials. However, the process usually requires high temperatures (≥159 °C), and the crosslinkers needed to stabilise the sulfur are therefore limited to high-boiling-point monomers only. Here, we report an alternative route for inverse vulcanization — mechanochemical synthesis, with advantages of mild conditions (room temperature), short reaction time (3 h), high atom economy, less H2S, and broader monomer range. Successful generation of polymers using crosslinkers ranging from aromatic, aliphatic to volatile, including renewable monomers, demonstrates this method is powerful and versatile. Compared with thermal synthesis, the mechanochemically synthesized products show enhanced mercury capture. The resulting polymers show thermal and light induced recycling. The speed, ease, versatility, safety, and green nature of this process offers a more sustainable future for inverse vulcanisation, and enables further unexpected discoveries.

Keywords

inverse vulcanization
mechnochemical synthesis
recycling polymer
mercury capture

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Supporting information
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Supporting information gives the details of experimental methods and procedures, and gives more data in addition to the data of the content.
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Video supporting information
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Video shows how elastic the healed polymer is.
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