Mechanical Properties of Silicon Carbon Black Filled Natural Rubber Elastomer

Abstract

A pyrolyzed ash containing about 50% carbon, named silicon carbon black(SiCB), was prepared by the anoxic pyrolysis of rice husk. Fourier transform infrared spectroscopy(FTIR), thermogravimetric analysis(TGA), Brunauer-Emmett-Teller(BET), transmission electron microscopy(TEM) and universal material testing machine were used to analyze the stress-strain relationship, Mullins effect and static viscoelastic properties of SiCB-filled vulcanized natural rubber(NR), and SiCB was compared with a commercially available semi-reinforcing furnace(SRF) carbon black. The results show that the vulcanized natural rubber filled with SiCB had similar reinforcing properties to those of that filled with traditional SRF, but obvious differences between them exist in stress -strain properties and stress softening resistance. We tried to discuss the related phenomena with the aid of the modified two-layer theory. And it is successfully predicted and verified that SiCB has good compression resistance and obvious stress relaxation advantages in compression stress relaxation.

Keywords

Silicon carbon black / Natural rubber / Stress-strain relationship / Stress relaxation

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