Author(s): Yatharth Garg

Abstract: Because of their structure, siloxane polymers are a valuable industrial commodity (R2-Si-O)-Because it is the initial stage in the breaking down macromolecules into tiny pieces so they can potentially be recycled, scission of the siloxane link is crucial. These extremely condition-specific reactions, which have been thoroughly investigated over the past 80 years, selectively initiate whether polymerization or breakdowns take place. The length of the backbone, the attached side groups, and the crosslinking ratio are responsible for giving the different types of silicones (Resins, fluids, or elastomers) their distinct properties. However, the environmental concerns surrounding polymer waste have increased, and so, an effective waste management has become necessary, with recycling being a key solution Studies on recycling siloxanes are still in their early stages, though. Using carbothermal reduction, traditional techniques of synthesizing silicones are quite expensive and capital intensive. The excessive release of pollutants and greenhouse gasses like CO2 into the atmosphere is the result of these interactions. It is therefore highly desired to be able to recycle and reuse them in a meaningful way. Because of this, siloxane researchers have been working toward developing methods to deliberately break the siloxane bond into recognized compounds since the 1950s. The primary methods for introducing the siloxane's scission include hydrolysis, catalytic depolymerization, thermal depolymerization, and radical extractions link, giving rise to a variety of compounds such as cyclics, monomeric silanes, and novel polymers. This review compiles information that has been published up to May 2024 regarding the breakdown and depolymerization of polysiloxanes.

DOI: 10.33545/26633582.2024.v6.i2c.145

Pages: 216-227 | Views: 2394 | Downloads: 1808

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