Research progress of the thermal conduction mechanisms of polymer composites in recent years was summarized,the theoretical framework models for predicting thermal conductivity were outlined,and highlights that the phonon conduction mechanism was crucial for enhancing the thermal conductivity of thermally conductive polymer composites were introduced.By analyzing the characteristics of Maxwell model,Bruggenman model,Every model,and other comprehensive models,it became evident that these theoretical models provide effective methods for predicting the thermal conductivity of polymer composites.Addi-tionally,the important factors influencing the thermal conductivity of filler-based polymer composites were explored.The influence law of factors such as filler type,filler shape and size distribution,filler content,and interfacial thermal resistance on the thermal conductivity of polymer composites were investigated.Finally,the challenges currently faced in the research of thermally conduc-tive polymer composites were summarized,and future research directions and development trends in this field were discussed.
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