In order to improve the damping properties of hydrogenated nitrilebutadiene rubber (HNBR ) ,3,9-
bis[ 1, 1-dimethyl-2{β-(3-tertbutyl-4-hydroxy-5-methylphenyl) propionyloxy} ethyl ] -2,4,8,10-tetraoxaspiro
[ 5, 5 ] -undecane (AO80) were added into it to prepare the vulcanized HNBR/ AO80 rubbers. The relationship
between the damping properties and micro-structure of this blending system was characterized by DMA & FTIR. Then
the stability of this system was studied by thermal treatment at 80℃. The results showed good damping property of this
blending system, which was due to the effect of intermolecular hydrogen bonds between the hydroxyl groups of AO80
and the nitrile groups of HNBR. But the damping property of this curing system become unstable after thermal treated
because of the self polymerization of AO80. With the increasing of thermal treated time, large number of AO80 formed
rich phase,crystallized,grewed up,then formed large crystallise aggregates.