The Thermal Conductive Property of TDI based Thermoplastic Polyurethane/graphene Nanoplatelets Composite

TDI based Thermoplastic polyurethane/graphene nanoplatelets(TPU/GNs) thermal conductive composite was in situ synthesised at room temperature, using polytetramethylene glycol(PEMG) as soft segment, 4-Methyl-m-phenylene diisocyanate (TDI) as hard segment, 1,4-butanediol (BDO) as chain-extending agents, GNs as thermal conductive filler. AlN was used as contrast thermal conductive filler. The morphology, thermal conductive properties of TPU/GNs composite were investigated. It showed that the percolation threshold effect of TPU/GNs composite occurred at the content around 12wt% of the GNs, and the thermal conductive properties was better than TPU/AlN composite. Besides, TDI based TPU thermal conductive composite showed much better thermal conductive properties while the thermal conductive filler was 10% GNs plus 2% AlN for the synergistic effect.