AI Article Synopsis
- * The study examines how devulcanization alters the types and amounts of sulfur cross-links in rubber, which affects its ability to be re-vulcanized.
- * Two different curing methods were tested to see if modifying the sulfur and accelerator ratio could change the sulfur composition of revulcanized rubber, but both methods still led to the majority of cross-links being polysulfidic.
Article Abstract
Devulcanized rubber could be a valuable material feedstock to help in the manufacture of sustainable rubber products. However, the differences in the chemistry and structure of devulcanized rubber have limited industrial uptake. This work demonstrates how devulcanization affects the concentration and ratios of mono-, di-, and polysulfidic cross-links. These residual cross-links make devulcanized rubber chemically dissimilar from virgin rubber, affecting (re)vulcanization. The hypothesis that the sulfur rank of revulcanized material can be modified by the sulfur/accelerator ratio was evaluated by two different cure packages. Despite substantial differences in the accelerator/sulfur ratio, both recycled rubber compounds favored the formation of polysulfidic cross-links.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11465549 | PMC |
| http://dx.doi.org/10.1021/acsomega.4c06159 | DOI Listing |
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