Figure 2. The thermal conductivities (κ) of a (10, 10) single-walled carbon nanotube (SWCNT), a suspended polyethylene chain (SPEC), and ACPCs versus the simulation cell’s length.

We named ACPC M-N as the structure which have M polyethylene (PE) chains inside the SWCNT and N chains outside the SWCNT. The thermal conductivities of an ACPC M-N are between those of the SWCNT and SPEC. The ACPC 3–8 and ACPC 3–12 have higher thermal conductivities comparing with other ACPC structures. The κ_ACPCs are not only three orders higher than the bulk PE, but almost twice as large as a SPEC.