Enhanced thermal conductivity of polyamide 6/polypropylene (PA6/PP) immiscible blends with high loadings of graphite
writer：Shengtai Zhou, Wei Luo, Huawei Zou*, Mei Liang, Shengzhao Li
keywords：Polyamide 6, polypropylene, immiscible blend, thermal conductivity, flake graphite
source：期刊
specific source：Journal of Composite Materials, 2016, 50(3): 327-337.
Issue time：2016年
Abstract: In this study, flake graphite was dispersed in immiscible polyamide 6/polypropylene (PA6/PP) blends to improve their hermal conductivity. Blends of PA6/PP were prepared in different relative fractions and thermal conductivity of the graphite-containing blends showed enhanced values for immiscible blends when compared with those of mono-PA6-based composites at the same graphite loading fractions. Moreover, a PA6/PP mass ratio of 8/2 showed better dispersion of graphite and less interfacial defects, resulting in better heat conduction ability when compared with other immiscible blends. At graphite loading of 40 wt%, thermal conductivity of PA6/PP/graphite composite reached 2.896 W/mK, which is nearly 40% higher than that of mono-PA6/graphite composite. Morphology and melt rheology measurements confirmed that flake graphite began to form thermally conductive network at 30 wt% in immiscible blends which is crucial to the improvement of thermal conductivity.