Study on Application of Coal Desulfurization Sulfur in NR Compound
The application of coal desulfurization sulfur in natural rubber(NR)compounds was studied.The results showed that the elemental sulfur content of coal desulfurization sulfur was 95.32%,and the main components of desulfurization sulfur were similar to sulfur.Using coal desulfurization sulfur as an equivalent substitute for sulfur as a vulcanization agent had a significantly delayed vulcanization effect for the NR compound.As the dosage of coal desulfurization sulfur increased,the Shore A hardness of the NR vulcanizate changed little,the modulus at 300%,tensile strength and tear strength increased first and then decreased,while the elongation at break and permanent set after break gradually decreased.
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