English Abstract
Coordination Crosslinking of Acrylonitrile-Butadiene Rubber and its Properties
Fei SHEN1,
Xiao-fang YUAN1,
Wei-hong GUO1,
Hideshi YANAGI1,2
Chi-fei WU1
1 Polymer Alloy Laboratory, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China
2 Bridgestone Co., Kodaira, Tokyo , Japan
Nippon Gomu Kyokaishi,(2008),81(8),323-328 Original Paper in Japanese

A novel vulcanization method, vulcanization through metal coordination crosslinking, is developed. In this method copper sulfate (CuSO4) particles are simply incorporated into acrylonitrile-butadiene rubber (NBR), and no other vulcanizing agent nor additional additives are involved.
It is totally different from traditional covalent or non-covalent vulcanization approaches of rubber. The crosslinking of CuSO4 particles filled NBR was induced by in situ coordination between nitrogen atoms of nitrile groups (-CN) and copper ions (Cu2+) from CuSO4. Several factors including heating temperature and time, the contents of CuSO4 and nitrile groups were investigated in this paper. The generation of a core (CuSO4 solid particle) - shell (adherent NBR) structure leads to the excellent mechanical properties of the coordination vulcanizates.

(Received on August 23, 2007)
(Accepted on May 8, 2008)

Coordination, Crosslink Network, Metal Ion, Nitrile Rubber, Vulcanization