Small Angle Neutron Scattering Investigations of Melt Miscibility and Phase Segregation in Blends of Linear and Branched Polyethylenes as a Function of the Branch Content

We have performed a series of small angle neutron scattering (SANS) experiments on blends of linear and branched polyethylenes to investigate the level of branching that is required to phase separate the system. These results confirm that the mixtures are homogenous for all compositions when the branch content is low (i.e., 2. In each case, the resolution of conventional SANS pinhole cameras (Qmin ∼ 10-3 A-1) is adequate to determine the state of mixing, even for systems with large domains.