Heat Capacities of Polyethylene III. One Linear and One Branched Sample from 5 to 350 K.

Heat capacities of two polyethylene samples, one linear with a density of 0.973 g cm and one branched with a density of 0.91 g cm, have been determined by adiabatic calorimetry from 5 to 360 K in a different experimental arrangement then employed for studies of other polyethylene samples in this series. The heat capacity behavior of these two samples confirms expectations for samples with corresponding densities.