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By incorporating copper sulfate（CuSO

4

）particles into acrylonitrile butadiene rubber（NBR）followed by heat pressing

a novel vulcanization method is developed in rubber through the formation of coordination crosslinking.This method totally differs from traditional covalent or non-covalent vulcanization approaches of rubber.No other vulcanizing agent or additional additive is involved in this process.By analyzing the results of DMA

XPS and FT-IR

it is found that the crosslinking of CuSO

4

particles filled NBR was induced by in situ coordination between nitrogen atoms of nitrile groups （-CN）and copper ions(Cu

2+

)from CuSO

4

.SEM and EDX results revealed the generation of a core（CuSO

4

solid particle）- shell（adherent NBR）structure

which leads to a result that the crosslinked rubber has excellent mechanical properties. Moreover

poly（vinyl chloride）（PVC）and liquid acrylonitrile-butadiene rubber（LNBR）were used as mobilizer to improve the coordination crosslinking of CuSO

4

/NBR.The addition of PVC or LNBR could lead to higher crosslink density and better mechanical properties of coordination vulcanization.In addition

crystal water in CuSO

4

played a positive role to coordination crosslinking of rubber because it decreased the metal point of CuSO

4

and promoted the metal ionization.