A novel reprocessable chloroprene rubber based on dynamic disulfide metathesis  

作　　者：Jianliang Jiang Junxue Zhai Yanqing Chen Dongqi Zhao Yakai Feng 

机构地区：[1]School of Chemical Engineering and Technology,Collaborative Innovation Center of Chemical Science and Chemical Engineering(Tianjin),Tianjin University,Tianjin,China [2]R&D Department of China(Yangzhou),Material Handling Tech-Engineering Ltd,Yangzhou,China [3]Key Laboratory of Rubber Plastics of Ministry of Education/Shandong Province,(QUsT),School of Polymer Science&Engineering,Qingdao University of Science&Technology,Qingdao,China [4]R&D Department of Tianjin Joaboa Technology Co.Ltd,Tianjin,P.R.China [5]Frontiers Science Center for Synthetic Biology,Tianjin University,Tianjin,China [6]Key Laboratory of Systems Bioengineering(Ministry of Education),Tianjin University,Tianjin,China

出　　处：《International Journal of Smart and Nano Materials》2024年第1期42-61,共20页国际智能和纳米材料杂志（英文）

摘　　要：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 repro-cessing performance owing to disulfde metathesis.When DPD was incorporated into CR vulcanization,the Menschutkin reac-tion between allyl chloride group and pyridine group occurred with a maximum exothermic peak at 184°C.The number of effective cross-linking bond at o.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 appli-cation in CR industry,also serve to significantly improve envir-onmental sustainability.

关 键 词：Chloroprene rubber reprocessable Menschutkin reaction DISULFIDE 

分 类 号：TQ33[化学工程—橡胶工业]