蓝晶石尾矿对丁苯橡胶胶料性能的影响

Effects of Kyanite Tailings on Properties of SBR Compounds

研究蓝晶石尾矿粒径和改性对丁苯橡胶(SBR)胶料性能的影响。结果表明:随着蓝晶石尾矿粒径[D_(90)(累计分布达到90%的粒径)]减小,SBR胶料的F_(L),F_(max)和F_(max)-F_(L)增大,SBR硫化胶的质量损失率为5%和50%时的热分解温度提高以及热分解温度为700℃时的质量保持率增大;各改性剂(棕榈酸、偶联剂KH-550、铝酸酯和硬脂酸)改性蓝晶石尾矿(粒径为2.75μm)的SBR硫化胶的300%定伸应力、拉伸强度和撕裂强度增大,其中偶联剂KH-550改性蓝晶石尾矿的SBR硫化胶的300%定伸应力、拉伸强度和撕裂强度最大,分别为5.8 MPa,7.1 MPa和24 kN·m^(-1);偶联剂KH-550改性蓝晶石尾矿与SBR的粘结较好,其SBR硫化胶的撕裂断面较为粗糙、致密。

The effects of the particle size and modification of kyanite tailings on properties of styrene butadiene rubber(SBR)compounds were studied.The results showed that with the decrease of kyanite tailings particle size[D_(90)(the cumulative distribution particle size of 90%)],the F_(L),F_(max) and F_(L)-F_(max) of SBR compound increased,the thermal decomposition temperatures of SBR vulcanizate at 5%and 50%mass loss rates and the mass retention rate at 700℃were improved.The tensile stress at 300%elogation,tensile strength and tear strength of SBR vulcanizate with kyanite tailings(particle size was 2.75μm)modified by various modifiers(palmitic acid,coupling agent KH-550,aluminate and stearic acid)increased,and the tensile stress at 300%elongation,tensile strength and tear strength of SBR vulcanizate with kyanite tailings modified by coupling agent KH-550 were the highest,which were 5.8 MPa,7.1 MPa and 24 kN·m-1,respectively.Kyanite tailings modified by coupling agent KH-550 had better bonding with SBR,and the tear section of the SBR vulcanizate was rough and dense.