橡胶和炭黑种类对硫化胶导热性能的影响

研究4种橡胶[天然橡胶（NR）、溶聚丁苯橡胶（SSBR）、乳聚丁苯橡胶（ESBR）、顺丁橡胶（BR）]配方和9种炭黑配方硫化胶的导热性能，建立硫化胶比热容的准确测试方法，分析得出导热性能相对优良的橡胶和炭黑种类。结果表明：调制差示扫描量热法（MDSC法）能够真实反映硫化胶的比热容，提高测试效率和准确度；不同橡胶和炭黑配方硫化胶的比热容均随温度的升高而增大，热扩散系数与温度有较好的线性负相关性，导热系数均随温度的升高呈现减小趋势；相同温度下，BR，ESBR，SSBR，NR硫化胶的热扩散系数和导热系数均依次减小；炭黑结构度高、粒径小有利于硫化胶热扩散系数的增大，中等粒径炭黑对于提高硫化胶的导热系数有较好的效果。

Effect of Rubber Type and Carbon Black Type on Thermal Conductivity of Vulcanizate

The thermal conductivities of vulcanizates made from four different types of rubber [natural rubber（NR），solution styrene butadiene rubber（SSBR），emulsion styrene butadiene rubber（ESBR） and butadiene rubber（BR）] and nine different types of carbon black were studied.An accurate method for measuring the specific heat capacity of vulcanizate was established and the rubber and carbon black types with superior thermal conductivity were identified.The results showed that the modulated differential scanning calorimetry（MDSC） method could accurately reflect the specific heat capacity of vulcanizate，improve testing efficiency and accuracy.The specific heat capacity of vulcanizates with different types of rubber and carbon black increased with the increasing temperature，and the thermal diffusivity exhibited a linear negative correlation with temperature.The thermal conductivity of vulcanizates decreased with increasing temperature.At the same temperature，the thermal diffusivity and thermal conductivity of vulcanizates made from BR，ESBR，SBSR and NR decreased in order.Carbon black with a high structure and small particle size facilitated the increase of thermal diffusivity of vulcanizate，while carbon black with a moderate particle size had a better effect on improving the thermal conductivity of vulcanizate.