Study on Preparation and Properties of SBR Foam Materials
The effects of the silica amount,the peroxide BIBP and crosslinking coagent TAIC amounts in the sulfur/peroxide BIBP blending co-vulcanization system,the foaming ratio,the pre-vulcanization temperature and the pre-vulcanization time on the properties of butadiene styrene rubber(SBR)foam materials were investigated.The results showed that,as the silica amount increased,the tensile stress at 100%elongation,tensile strength,static stiffness and dynamic/static stiffness ratio of SBR foam material increased,while the elongation at break decreased.As the peroxide BIBP and crosslinking coagent TAIC amounts increased,the tensile strength,elongation at break,compression set and dynamic/static stiffness ratio of SBR foam material decreased,while the tensile stress at 100%elongation and static stiffness increased.As the foaming ratio increased,the static stiffness of SBR foam material decreased and the dynamic/static stiffness ratio increased.When the pre-vulcanization temperature was 125℃and the pre-vulcanization time was 16 min,the vibration reduction properties of the SBR foam material were optimal,the pore diameter was smaller and the pore distribution was uniform.
SBRfoam materialsstatic stiffnessdynamic/static stiffness ratio
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