Molecular dynamics simulations for nanometer scale polyethylene (PE) partic
les generated with up to 12000 atoms are presented to gain insight into som
e thermodynamic properties of ultrafine polymer powders. By computing molec
ular volume and total energy as a function of temperature, we obtained melt
ing point, glass transition temperature, and heat capacity. The results of
our simulations predict an interesting reduction of the melting point in co
mparison with the PE bulk system.