Доступ предоставлен для: Guest

ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

HOW VAN DER WAALS CONFINEMENT ENHANCES THERMAL CONDUCTIVITY IN CROSSWISE PAVED POLYETHYLENE LAMINATE

Get access (open in a dialog) DOI: 10.1615/IHTC16.hte.022458
pages 5199-5206

Аннотация

Enhancing thermal conductivity of polymers that enjoy the advantages of low cost and easy processing would improve the heat dissipation and promote the development of high-performance electronics. Instead of introducing scatterings in conventional structures, we showed that van der Waals (vdW) confinement can dramatically facilitate heat transport in the crosswise paved polyethylene laminate (CPPEL) by molecular dynamics simulations. The thermal conductivity of CPPEL is more than twice higher than that of polyethylene single chain and three orders higher than that of amorphous bulk polyethylene. Morphological results indicated that both atomic vibrations and segmental rotation of backbone were diminished, corresponding to more crystal-like atomic vibrations. Through further analysis of potential energy and vibrational properties, we attributed enhanced thermal transport to confining vdW potential well and less anharmonic vibrations. Our work offers new insights into the influence of vdW interactions on phonon transport, and opens up a new avenue towards the design of polymers with high thermal conductivity.