Influence of the Compaction Temperature on the Electrical and Mechanical Properties of the Segregated Conductive Ultrahigh Molecular Weight Polyethylene/Carbon Nanotube Composite

Abstract

The effect of the compaction temperature on the electrical and mechanical properties of the segregated conductive polymer (CPC)/ carbon nanotube (CNT) composites was investigated. The conductive fillers were not uniformly dispersed in the composites but were dominantly localized on the granule boundaries, very efficiently forming conductive networks. The ultrahigh-molecular-weight polyethylene (UHMWPE) segregated CPCs were synthesized with two compaction temperature, one just above the melting temperature (145 C) and another higher than the melting temperature (200 C). UHMWPE/CNT exhibited the better electrical conductivity by comparing to high-density polyethylene (HDPE)/UHMWPE/ CNT, while the HDPE/UHMWPE/CNT segregate CPCs displayed the higher values of the tensile mechanical properties than those of UHMWPE/CNT at the two compaction temperatures. The higher compaction temperature was in favor of the improvement on mechanical properties and degraded the electrical performance of UHMWPE/CNT. For HDPE/UHMWPE/CNT, the electrical and mechanical properties both reduced with decreasing the compaction temperature. These results can further determine the optimal preparation conditions of the segregated composites.

Role of the Amorphous Morphology in Physical Properties of Ultra High Molecular Weight Polyethylene

“…To improve the crystallization of the lamellas and prevent the lamellas growing large enough, nano-silicon carbide was used. Commonly, nanomaterials were often used to prepare the well-defined composites and performed as the crucial element in the final performance [23][24][25] .…”

Segregated highly conductive linear low‐density polyethylene/graphene nanoplatelet composite through aqueous dispersing and self‐leveling method

“…Polymers with high melt viscosity, such as UHMWPE, cross-linked poly (ethylene-co-octene) (POE) and so on, are often used as matrix to avoid large filler migration and maintain the segregated structures during melting. [28][29][30] However, in molding these polymers, certain pressure has to be applied due to the extremely poor melt fluidity. For example, the thermoplastic polyurethanes (TPU)/UHMWPE-graphite composites were constructed by mechanical crushing and hot-pressing method.…”

“…Polymers with high melt viscosity, such as UHMWPE, cross‐linked poly (ethylene‐co‐octene) (POE) and so on, are often used as matrix to avoid large filler migration and maintain the segregated structures during melting 28–30 . However, in molding these polymers, certain pressure has to be applied due to the extremely poor melt fluidity.…”

Selective Microwave Sintering to Prepare Multifunctional Poly(ether imide) Bead Foams Based on Segregated Carbon Nanotube Conductive Network

“…Currently, considerable attention has been given to improve the electrical conductivity performance of CPCs by elaborating structural designs. The formation of a segregated electrical conductive network is an effective way to increase electrical conductivity. , Therefore, polymer materials including common polymers (polyethylene, , polystyrene, polypropylene, , etc . ), nonpetroleum polymers (poly­(lactic acid), polycaprolactone, etc .…”

“…The formation of a segregated electrical conductive network is an effective way to increase electrical conductivity. 18,19 Therefore, polymer materials including common polymers (polyethylene, 20,21 polystyrene, 22 polypropylene, 23,24 etc. ), nonpetroleum polymers (poly(lactic acid), 25 polycaprolactone, 26 etc.…”