1D-to-3D transition of photon heat conduction in polyethylene using molecular dynamics simulations

[摘要] (cont.) For most crystalline nanostructures, the thermal conductivity decreases with decreasing crystal size from an enhanced boundary scattering of phonons. In the case of polyethylene, however, the intermolecular chain-chain interactions increase phonon-phonon scattering along each chain and actually result in the opposite trend, where the thermal conductivity increases with decreasing crystal size. The results provide important fundamental insight into phonon-phonon interactions and will also aid in the design and structural optimization of high thermal conductivity polymers.

[发布机构] Massachusetts Institute of Technology