A novel reprocessable chloroprene rubber based on dynamic disulfide metathesis

Autor: Jianliang Jiang, Junxue Zhai, Yanqing Chen, Dongqi Zhao, Yakai Feng
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: International Journal of Smart and Nano Materials, Vol 15, Iss 1, Pp 42-61 (2024)
Druh dokumentu: article
ISSN: 19475411
1947-542X
1947-5411
DOI: 10.1080/19475411.2023.2258830
Popis: ABSTRACTFor 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.
Databáze: Directory of Open Access Journals
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