ABSTRACT

This paper aims to increase the through-plane thermal conductivity of polymer composites by adjusting the filler orientation. Two methods were tested: a combination of immiscible polymers (PP-PET) and adding a foaming agent to a PA6-based composite. In both cases, graphite was used as a thermal conductive filler. Compounds with 10, 20 and 30 wt-% graphite were made for both methods. The through-plane thermal conductivity increased for all PA6- foaming agent composites, while the in-plane thermal conductivity decreased compared to PA6 without foaming agent. PP-PET combinations generally outperformed the PP in through-plane performances as well. Tensile strength decreased with increasing amounts of graphite. As expected, adding foaming agents and a second phase decreased strength as well compared with virgin materials. With further optimisation, a combination of fillers and foaming agents in thermoplastics or two-phase systems could prove to be valuable in thermal management applications.

摘要

本文旨在通过调整填料取向来提高聚合物复合材料的平面热导率。测试了两种方法：不混溶聚合物 (PP-PET) 的组合和在 PA6 基复合材料中添加发泡剂。在这两种情况下，石墨都被用作导热填料。两种方法都制备了具有 10、20 和 30 wt-% 石墨的化合物。所有 PA6-发泡剂复合材料的平面热导率均增加，而与不含发泡剂的 PA6 相比，面内热导率降低。PP-PET 组合在贯穿平面性能方面通常也优于 PP。抗拉强度随着石墨量的增加而降低。正如预期的那样，与原始材料相比，添加发泡剂和第二相也降低了强度。经过进一步优化，