Abstract
The mechanochemical reaction of SBR (Styrene-Butadiene Rubber) was investigated at room temperature up to 10kbar static pressure by using a self-made high pressure apparatus capable of generating simultaneous shear deformation. The shearing curve at high static pressure rapidly reached an equilibrium value. The shearing curve at low static pressure, however, slowly approached it after the gradual increase of shear strength. The maximum shear strength at high static pressure was observed on SBR with 23wt% styrene content which corresponds to widely available SBR. The mechanochemical gelation of SBR was influenced by applied static pressure and was probably related to the occurrence of the cross-linking in styrene region.
