Bis-[3-(triethoxysilyl)propyl] tetrasulfide (TESPT) was used to modify three different-dimensional silicas to fill natural rubber to prepare composite materials,and the obtained composite materials were characterized by FI-TR,DMA and Akron abrasion machine.The results showed that the zero-dimensional silica/natural rubber composite had the highest wet skid resistance and the lowest rolling resistance when the silica was not modified.One-dimensional silica/natural rubber composites had the highest crosslinking density,and two-dimensional silica/natural rubber composites had the highest filler-rubber interaction and wear resistance.After TESPT modification,one-dimensional modified silica/natural rubber composites showed the highest crosslinking density,tensile strength,wet skid resistance and wear resistance,and two-dimensional modified silica/natural rubber composites had the lowest rolling resistance.Compared with unmodified silica,after TESPT modification,the vulcanization time of three different-dimensional modified silica/natural rubber composites decreased,the scorch behavior was improved,the crosslinking density increased,the dispersion of fillers in the matrix was enhanced,and the filler-rubber interaction increased.
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基金资助
国家自然科学基金(52063006)
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