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A novel reprocessable chloroprene rubber based on dynamic disulfide metathesis.
- Source :
- International Journal of Smart & Nano Materials; Mar2024, Vol. 15 Issue 1, p42-61, 20p
- Publication Year :
- 2024
-
Abstract
- For sustainable application of chloroprene rubber (CR), a new technology is developed by the vulcanization of CR using 2,2'-dithiodipyridine (DPD) as a cross-linking agent with the reprocessing performance owing to disulfide metathesis. When DPD was incorporated into CR vulcanization, the Menschutkin reaction between allyl chloride group and pyridine group occurred with a maximum exothermic peak at 184°C. The number of effective cross-linking bond at 0.5 phr DPD vulcanizate was higher than that at high DPD content. This vulcanizate showed high tensile strength (11.12 MPa) and elongation at break (1253 ± 120%) owing to the exchangeable disulfide bond in the system. Under the catalysis of triphenylphosphine, the metathesis of disulfide compound was improved obviously, which endowed CR/DPD vulcanizates with good recyclability performance. Disulfide cross-linkage maintains its stability at low temperature, thus ensuring the mechanical stability of CR/DPD vulcanizate under the ambient conditions. Vulcanization and reprocessing of CR/DPD vulcanizate can be conducted with common industrial rubber processing equipment. Such reprocessable chloroprene rubber could have potential application in CR industry, also serve to significantly improve environmental sustainability. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 19475411
- Volume :
- 15
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- International Journal of Smart & Nano Materials
- Publication Type :
- Academic Journal
- Accession number :
- 175911166
- Full Text :
- https://doi.org/10.1080/19475411.2023.2258830