混炼条件对HAF填充型粉末SBR混炼性能的影响

Effect of mixing conditions on rheological behavior of HAF black filled powdered SBR

采用Brabender转矩流变仪研究高耐磨炭黑 (HAF)填充型粉末SBR [P(SBR/HAF) ]和块状SBR (SBR/HAF)在较宽的混炼条件范围内 (转速 40～ 80r·min- 1 ,循环油温 5 0～ 10 0℃ )于密炼机中混炼的流变特性 ,讨论了混炼条件对胶料混炼流变性能的影响。结果表明 ,在试验的转子转速和循环油温范围内 ,P(SBR/HAF)比SBR/HAF表现出较高的表观剪切粘度 ,其对混炼时间的依赖性为SBR/HAF的 5 0 %～ 70 % 。

The effect of different mixing conditions (rotor speed:40～80 r·min -1;temperature of circulating oil:50～100 ℃) on the rheological behavior of HAF black filled powdered SBR [P(SBR/HAF)] was investigated by using Brabender torque rheometer and compared to that of HAF black filled bale SBR (SBR/HAF).It was found from the test results that at above rotor speeds and mixing temperatures,the higher apparent shear viscosity and 30%～50% lower dependence on mixing time were observed forP(SBR/HAF) when compared to those for SBR/HAF,while two kinds of mixes showed similar dependence on rotor speed and mixing temperature.