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Synergistic Effect of Copper Sulfate and Tetramethylthiuram Monosulfide Induced Metal‐Coordination Cross‐Linking in Nitrile–Butadiene Rubber
Author(s) -
Sun Yingtao,
Wang Junhao,
Sun Longyi,
Hua Jing,
Wang Zhaobo
Publication year - 2021
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.202100057
Subject(s) - vulcanization , nitrile , microstructure , materials science , ultimate tensile strength , natural rubber , metal , copper , curing (chemistry) , nitrile rubber , swelling , thermal stability , polymer chemistry , chemical engineering , composite material , chemistry , metallurgy , organic chemistry , engineering
The cross‐linking microstructure formed by the metal‐coordination bonds provides excellent properties for rubber materials. Copper sulfate (CuSO 4 ) and tetramethylthiuram monosulfide (TMTM) are successfully compounded with nitrile–butadiene rubber (NBR) to fabricate vulcanizates by the coordination cross‐linking. The curing characteristics, mobility of macromolecular segment, mechanical properties, morphology analysis, swelling properties, and dynamic features under cyclic compression of the vulcanizates are investigated systematically. The results indicate that the microstructure of 3D cross‐linking is held together by the metal‐coordination bonds between Cu 2+ and CN. The torque during static vulcanization, tensile strength, and cross‐linking density of the obtained NBR/CuSO 4 /TMTM vulcanizates are better than that of NBR/CuSO 4 vulcanizates, which is attributed to the synergistic effect between the radicals formed by the splitting of TMTM under thermal activation and the Cu 2+ ; moreover, the highly reactive [Cu(S n CNMe 2 )] •2+ complexes are formed by the synergistic effect and promote the coordination stability of NBR and CuSO 4 effectively. The excellent tensile properties of the prepared NBR/CuSO 4 /TMTM vulcanizates via synergistic effect made the metal‐coordination cross‐linking attractive in the field of industrial application.