Fully Organic Bulk Polymer with Metallic Thermal Conductivity and Tunable Thermal Pathways.

ABSTRACT: Electrically insulating polymers are indispensable for electronic and energy applications, but their poor thermal conduction has increasingly become a bottleneck for high-performance devices. Highly drawn low-dimensional polymeric fibers and thin films can exhibit metallic conductivity. Extending this to bulk materials required by real world applications is prohibitive due to the additional interfacial thermal conduction barriers. It is demonstrated that highly aligned ultrahigh molecular weight polyethylene microfibers can be incorporated into a silicone matrix to yield a fully organic bulk polymer composite with a continuous vertical phonon pathway. This leads to a perpendicular thermal conductivity of 38.27 W m^-1 K^-1 , at par with metals and two orders of magnitude

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC8292902 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature