Thermally Conductive Composites Obtained by Carbon Nanotubes Filling Immiscible Polyamide 6/Poly (phenylene sulfide) Blends

Polyamide-type composites with improved thermal conductivity are prepared by using polyamide 6(PA6)/poly (phenylene sulfide)(PPS) 6 : 4 blend as the matrix and carbon nanotubes (MWCNTs) as the filler through melt compounding. Blends of MWCNTs/PPS/PA6 were melt blended with two different mixing seque...

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Veröffentlicht in:Polymer science. Series B 2021-11, Vol.63 (6), p.790-801
Hauptverfasser: Yi Lin, Lang, Feng, Zeng, Dan, Li, Duxin, Xiao, Chunguang, Xiang, Yu, Shangguan, Jinfei
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Sprache:eng
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Zusammenfassung:Polyamide-type composites with improved thermal conductivity are prepared by using polyamide 6(PA6)/poly (phenylene sulfide)(PPS) 6 : 4 blend as the matrix and carbon nanotubes (MWCNTs) as the filler through melt compounding. Blends of MWCNTs/PPS/PA6 were melt blended with two different mixing sequences. At the MWCNTs loading of 8.69 wt %, thermal conductivity of MWCNTs/PPS/PA6 composite by the two-step blending method reached to 0.572W/(m K), which is 40.9% higher than that of composite by the one-step blending method. The reason for the improved thermal conductivity is the increased effective volume concentration of MWCNTs in single (PPS) phase. Especially, the DSC results and SEM observations showed that there were distinct differences in the crystallization and morphology of the samples prepared by the different mixing sequences. Moreover, a great influence on thermal conductivity and thermal stability of MWCNTs were found. The thermal conductivity of MWCNTs/PPS/PA6 composite with 36.36 wt % MWCNTs is 1.12 W/(m K), which is 331% enhancement compared to those of pure matrix based PPS/PA6 composites.
ISSN:1560-0904
1555-6123
DOI:10.1134/S1560090421060154