Abstract The surface activity of carbon black (CB) is an important factor affecting the reinforcement of rubber. The quantitative determination of the surface activity (surface free energy) of CB is of great significance. A simplified formula is obtained to determine the free energy of CB surface through theoretical analysis and mathematical derivation. The surface free energy for four kinds of industrial CBs were measured by inverse gas chromatography, and the influential factors were studied. The results showed that the aging time of the chromatographic column plays an important role in accurate measurement of the surface free energy of CB, in comparison with the influences from the inlet pressure and carrier gas flow rate of the chromatographic column filled with CB. Several kinds of industrial CB were treated at high temperature, and the surface free energy of CB had a significant increase. With the increase of surface free energy, the maximum torque was decreased significantly, the elongation at break tended to increase, the heat generation of vulcanizates was increased, and the wear resistance was decreased.

中文翻译：

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影响橡胶补强炭黑表面自由能的因素

摘要 炭黑（CB）的表面活性是影响橡胶补强的重要因素。CB的表面活性（表面自由能）的定量测​​定具有重要意义。通过理论分析和数学推导，得到了确定CB表面自由能的简化公式。采用反气相色谱法测定了4种工业CBs的表面自由能，并研究了其影响因素。结果表明，与填充CB的色谱柱的入口压力和载气流速的影响相比，色谱柱的老化时间对CB表面自由能的准确测量起着重要作用。几种工业CB经过高温处理，CB的表面自由能显着增加。随着表面自由能的增加，最大扭矩显着降低，断裂伸长率有增加的趋势，硫化胶生热增加，耐磨性降低。