高填充改性复合材料导热预测模型的建立及应用

doi:10.19491/j.issn.1001-9278.2020.07.008

中国塑料 ›› 2020, Vol. 34 ›› Issue (7): 49-55.DOI: 10.19491/j.issn.1001-9278.2020.07.008

高填充改性复合材料导热预测模型的建立及应用

王杨慧, 马玉录, 谢林生(), 宋果, 朱惠豪

华东理工大学绿色高效过程装备与节能教育部工程研究中心，上海 200237

收稿日期:2020-01-09 出版日期:2020-07-26 发布日期:2020-07-26

Establishment and Application of Thermally Conductive Prediction Model for High‑Filled Modified Composites

Yanghui WANG, Yulu MA, Linsheng XIE(), Guo SONG, Huihao ZHU

Engineering Center of Efficient Green Process Equipment and Energy Conservation of Ministry of Education, East China University of Science and Technology, Shanghai 200237, China

Received:2020-01-09 Online:2020-07-26 Published:2020-07-26
Contact: Linsheng XIE E-mail:lsxie@ecust.edu.cn

摘要/Abstract

摘要：

在对高填充改性复合材料导热过程进行研究的基础上，建立了基于串并联/并串联模型并考虑了界面热阻作用的高填充改性复合材料导热预测模型。借助于双转子连续混炼机制备两种氧化铝粒径不同填充量的聚丙烯/氧化铝（PP/Al₂O₃）复合材料，运用激光导热仪对其导热性能进行了表征，并与模型预测结果进行了对比。结果表明，所建立的模型对高填充复合材料的导热性能的预测具有较高的准确性；当氧化铝填充量较低时，模型中的界面热阻因子最高；随着氧化铝填充量增加，界面热阻因子显著降低；当氧化铝填充量继续增加时，界面热阻因子逐渐降低并趋于稳定；高填充量下相同制备工艺下同种填充改性复合材料的界面热阻近似相同。

关键词: 导热预测模型, 导热复合材料, 氧化铝, 界面热阻

Abstract:

On the basis of the research of the thermal conduction process of high?filled modified composites, the thermally conductive prediction model for high?filled modified composites which considering the effect of the interfacial thermal resistance at the same time was established based on the series?parallel/parallel?series model. Polypropylene/alumina （PP/Al₂O₃） composites with two types of alumina particle sizes under different loadings were prepared by a two?rotor continuous mixer. The thermal conductivity of the composites was characterized by a laser thermal conductivity instrument and then was compared with the model prediction results. The results show that: The established model has higher accuracy in predicting the thermal conductivity of the highly filled composites. The interfacial thermal resistance factor in the model is highest when the alumina loading is low; the factor significantly reduce as the alumina loading reaches to a certain level; finally, the factor remains stable when the alumina loading continues to increase. The interfacial thermal resistance of the same filled and modified composite prepared by the same preparation process under high filling capacity is approximately the same.

Key words: thermally conductive prediction model, thermally conductive composite, alumina, interfacial thermal resistance

中图分类号:

TQ327.8

王杨慧, 马玉录, 谢林生, 宋果, 朱惠豪. 高填充改性复合材料导热预测模型的建立及应用[J]. 中国塑料, 2020, 34(7): 49-55.

Yanghui WANG, Yulu MA, Linsheng XIE, Guo SONG, Huihao ZHU. Establishment and Application of Thermally Conductive Prediction Model for High‑Filled Modified Composites[J]. China Plastics, 2020, 34(7): 49-55.

图/表 6

图1 填料整体分布图和单元体导热示意图

Fig. 1 The diagrams of the overall distribution of the filler and the thermal conduction of the unit

图2 高填充改性复合材料导热预测串并联模型的热流传递原理图

Fig.2 Schematic diagram of heat flow transfer in the series?parallel thermally conductive prediction model for high?filled modified composites

图3 高填充改性复合材料导热预测并串联模型的热流传递原理图

Fig. 3 Schematic diagram of heat flow transfer in the parallel?series thermally conductive prediction model for high?filled modified composites

图4 两种粒径氧化铝在不同填充量下制备的PP/Al2O3复合材料的导热系数

Fig.4 Thermal conductivity of PP/Al2O3 composites with two types of alumina particle sizes under different alumina loadings

图5 两种粒径氧化铝在不同填充量下制备的PP/Al2O3复合材料的界面热阻因子C

Fig. 5 Interfacial thermal resistance factor C of PP/Al2O3 composites with two types of alumina particle sizes under different alumina loadings

图6 不同填充量下两种粒径氧化铝填充制备的PP/Al2O3复合材料导热系数实验值与模型预测结果的对比

Fig.6 Comparison of experimental values and model prediction ones of thermal conductivity of PP/Al2O3 composites with two types of alumina particle sizes under different loadings

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高填充改性复合材料导热预测模型的建立及应用

Establishment and Application of Thermally Conductive Prediction Model for High‑Filled Modified Composites

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