Preparation and Performance of High Thermal Conductivity Polypropylene-based Composites


  • Haijun Zhou
  • Xiaolei Zhang
  • Lu Bai
  • Yating Zhao
  • Xiaoqi Chen
  • Fen Zhang
  • Yantao Li



Polypropylene-based, High thermal conductivity, Composite materials, Compression molding, Preparation and performance


Polypropylene-based composites with high thermal conductivity were obtained by pressure injection molding using a hybrid form of PP as the matrix and FG as the thermally conductive filler with a particle size of 37 µm. Microscopic morphologies of the material were examined by SEM to determine the effect of FG content on the thermal conductivity and mechanical properties of the composites. The study found a clear correlation between the thermal conductivity of the composites and the FG content. The research confirmed a direct link between the thermal conductivity of the composites and FG content. At 70 wt%, the material demonstrated the greatest average, axial, and radial thermal conductivity of 7.52 W·m-1·K-1, 12.6 W·m-1·K-1, and 4.50 W·m-1·K-1, respectively.  However, any subsequent increase in fractional gradient (FG) content resulted in a decrease in the strength and modulus of the material. The highest tensile and flexural strength values of 34.9 and 63.7 MPa respectively, were achieved when the FG content was 60 wt%. At this particular FG content, the tensile and flexural modulus also reached 9.78 and 10.7 gigapascals (GPa), respectively. As the FG content increased, the strain on the composite material decreased. Note that the maximum tensile and flexural strains were measured at 50 wt% FG content, with values of 0.77% and 0.79%, respectively. The glass fiber sheets in the injection molded composites were uniform and predominantly vertically oriented.


Download data is not yet available.


Ma Chuanguo, Rong Minzhi, Zhang Mingqiu. Research and application of thermal conductive polymer composites[J]. Journal of Materials Engineering, 2002, 12(07): 40-45.

Liu Keke, Wang Tao, Wei Yongqiang, et al. Research progress of thermal conductive fillers for polymer composites[J]. China Plastics Industry, 2013, 41(04): 6-9.

Chu Luxuan. Research and application on high thermal conductivity of functional polymer materials[D]. Wuxi: Jiangnan University, 2012.

Fan Wei, Feng Gang, Zhao Jiawei. Research and application development of thermal conductivity polymer composites[J]. Engineering Plastics Application, 2011, 39(12): 101-104.

Liu Han, Wu Hongwu. Research progress of thermal conductive polymer composites with fillers[J]. China Plastics Industry, 2011, 39 (04): 10-13.

Guo Henan, Wen Bianying. Progress on research and application for filled thermal conductive polymeric composites[J]. Engineering Plastics Application, 2014, 42(09): 106-110.

Xu Huagen, Peng Xintao, Zhou Junjie, et al. Research of thermally conductive composites based on flake graphite filled in polyamide 6/polypropylene[J]. Engineering Plastics Application, 2015, 43(09): 1-6.

Julia A King, Beth A Johnson, Michael D Via, et al. Effects of carbon fillers in thermally conductive polypropylene based resins[J]. Polymer Composites, 2010, 31(03): 497-506.

[9] Liu Ke, Liu Ying, Wu Daming, et al. The effect of flake graphite orientation on the thermal conductivity of flake graphite/polypropylene and flake graphite/nylon 66 composites[J]. Journal of Composite Materials, 2014, 31 (03): 610-616.

Wang Zhengzheng, Liu Deju, Zhou Haijun, et al. Preparation and properties of polypropylene/flake graphite thermal conductive composites[J]. Engineering Plastics Application, 2020, 48(01): 30-34+45.

Wu Jiawei, Ji Xinyu, Yang Jindi, et al. Preparation and properties of polypropylene/ graphite composites with high thermal conductivity[J]. Engineering Plastics Application, 2016, 44(08): 36-40.

Meng Jiru, Liang Guozheng, Qin Huayu, et al. Research on toughening and strengthening polymers with rigid particles[J]. Plastics, 2002, 31(02): 47-50.




How to Cite

“Preparation and Performance of High Thermal Conductivity Polypropylene-based Composites” (2023) Transactions on Engineering and Technology Research, 1, pp. 16–21. doi:10.62051/d4gz0m57.

Similar Articles

1-10 of 16

You may also start an advanced similarity search for this article.