炭黑填充橡胶两相复合体系的热导率

THERMAL CONDUCTIVITY OF THE COMPOSITE SYSTEM OF CARBON BLACK-FILLED NATURE RUBBER

本文根据炭黑的结构特征和形态,对前期研究提出的炭黑/橡胶复合体系的热导率球形模型进行了改进,提出了新的预测模型,并推导出热导率计算方程。利用球形模型和新模型分别对N234炭黑、N330炭黑、N375炭黑和N539炭黑填充胶的热导率进行了理论预测,并与实验结果进行对比,发现:在炭黑体积分数2%～35%内,新模型比球形模型能更好地预测炭黑填充胶的热导率;新模型对四种胶热导率的预测结果,最大偏差不超过9%,平均偏差小于4%。

According to the structural characteristics and morphology of carbon black the sphericity thermal conductivity model which was proposed in previous studies is improved, a new model is proposed and a new theoretical equation is derived. Respectively, by using the new equation and sphericity thermal conductivity equation respectively the thermal conductivities of N234 carbon black/rubber, N330 carbon black/rubber, N375 carbon black/rubber and N539 carbon/rubber composites are estimated. The estimated results are finally compared with experimental ones. It is found that the estimated thermal conductivitis of carbon black/rubber composites are more accurate by the new model than by the sphericity model at the range of the volume filler fraction of carbon black from 2% to 35%. By the new model, the maximum deviation and average deviation of the estimated thermal conductivitis of four types of carbon black-filled nature rubbers are less than 9% and 4% respectively.