The Effect of Molding Process and Test Conditions on the Thermal Conductivity of Polypropylene/Graphite Composites


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The thermal conductive composites prepared by twin-screw extrusion extrudes polypropylene and graphite.This paper studies the influence of molding process on the thermal conductivity.The experimental results show that thermal conductivity of composites changes with the screw rotate speed changing,obtaining the maximum when the screw rotate speed is 300r/min.Results indicate that the opposite trend with thermal conductivity and the melt index and injection speed,and the injection temperature has not a big influence on the thermal conductivity. The crystallization influences the electrical conductivity and density of some points of molding samples.In addition,the test condition has cast impact on thermal conductivity,in the lower temperature(lower than the Debye temperature),the thermal conductivity of composites increased with the of temperature and humidity increasing.



Advanced Materials Research (Volumes 588-589)

Edited by:

Lawrence Lim




S. Yan et al., "The Effect of Molding Process and Test Conditions on the Thermal Conductivity of Polypropylene/Graphite Composites", Advanced Materials Research, Vols. 588-589, pp. 1702-1708, 2012

Online since:

November 2012




[1] Geon-Woong Lee, Min Park, Junkyung Kim. Composites, 2006, Part A 37: 727-734.

[2] Agari Y, Ueda A, Nagai S. Journal of Applied Polymer Science, 1993, 49: 16-25.

[3] S. Shaikh, L. Li,K. Lafdi, J, Huie. Carbon, 2007, 45: 2608-2613.

[4] International technology roadmap for semiconductors 2005 edition. http: public. itrs. net (accessed May 5, 2007).

[5] Jessica A. Heiser and JuliaA. King, Polymer Composites, 2004; 25: 186-193.

[6] CAUSIN V, MAREGA C, MARIGO A, etal. Morphological and structural characterization of polypropylene/conductive graphite nanocomposites [J]. Eur polym J, 2006, 42: 3153-3161.


[7] Haoming Tuaand Lin Ye, Thermal conductive PS/graphite composites[J]. Polym. Adv. Technol. 2009, 20: 21-27. DOI: 10. 1002/pat, 1236.


[8] Mihai Rusu, Nicoleta Aofian, Daniela Rusu. Properties of Iron Powder Filled High Density Polyethylene [J]. Journal of Applied Polymer Science, 2001, 21: 469-487.


[9] Lee G W, Park M, Kim J K, etal. Enhanced thermal conductivity of polymer compsites filled with hybrid filler[J]. Composites(Part A) : Applied Science and Manufacturing, 2006, 37(5): 727-734.