  Phagraphene is a novel 2D carbon allotrope with interesting electronic
properties which has been recently theoretically proposed. Phagraphene is
similar to a defective graphene structure with an arrangement of pentagonal,
heptagonal and hexagonal rings. In this study we investigate thermal
conductivity and mechanical properties of phagraphene using molecular dynamics
simulations. Using the non-equilibrium molecular dynamics method, we found the
thermal conductivity of phagraphene to be anisotropic, with room temperature
values of $218 \pm 20$ W/m-K along the armchair direction and $285 \pm 29$
W/m-K along the zigzag direction. Both values are one order of magnitude
smaller than pristine graphene. Analysis of phonon group velocities also shows
a significant reduction in this quantity for phagraphene in comparison to
graphene. By performing uniaxial tensile simulations, we studied the
deformation process and mechanical response of phagraphene. We found that
phagraphene exhibits a remarkable high tensile strength around $85 \pm 2$ GPa,
whereas its elastic modulus is also anisotropic along in-plane directions, with
values of $870 \pm 15$ GPa and $800 \pm 14$ GPa for armchair and zigzag
directions respectively. The lower thermal conductivity of phagraphene along
with its predicted electronic properties suggests that it could be a better
candidate than graphene in future carbon-based thermoelectric devices.
