Polytetramethylene ether glycol (PTMEG) was used to functionalize multi-walled carbon nanotube (MWNT) by grafting to produce MWNT-g-PTMEG. These functionalized nanotubes were then dispersed in thermoplastic polyurethane (TPU) to form a TPU/MWNT nanocomposite. It was found that the functionalization resulted in improved dispersion of the nanotubes in the TPU material. The tensile strength and elongation at break of the nanocomposite were also enhanced by the addition of the nanotubes in ...
The effects of using different fillers and the effects of filler content and particle size on the thermal properties of thermal interface materials were investigated. The most prominent enhancement in thermal conductivity was observed for samples containing carbon nanotubes and graphite. The filler particle size was also found to significantly affect the thermal conductivity, as smaller fillers resulted in a higher thermal conductivity. The article also describes two sample holders ...
In the soft tooling process for making moulds, polyurethane is often used as a flexible mould material. The low thermal conductivity of polyurethane results in a long solidification time of the wax/plastic pattern produced in the soft tooling process. In an effort to address this issue, the authors of this article have added highly conductive fillers to polyurethane. The fillers used for this study were aluminum fine powder and ...
The effects of intrinsic thermal conductivity, carbon filler geometry, and interface thermal resistance on the effective thermal conductivity of polymer composites were investigated. It was found that the length of carbon fillers and the interface thermal resistance were the dominant factors in determining the effective thermal conductivity of the composites. The authors suggest that the most thermally conductive polymer composite would contain long carbon nanofibers that have undergone surface functionalization ...
This article investigated the effects of incorporating silica layers into polypropylene nanocomposites. The influence of the silica layers on the thermal conductivity of the material is compared to the influence of other fillers to determine which is superior. The authors found that particle size and number affect the thermal conductivity in addition to content percentage. The silica layers produced a more impressive increase in thermal conductivity than other fillers on ...
