We will exploit the unique capability of Nimrod in the study of the long standing issue of polymer crystallisation. We focus on polycaprolactone containing small quantities of nanoparticles with many biomedical applications. For polymer crystallisation there are three key length scales: the change from random to regular local chain conformation; registry at the atomic scale of the crystal planes in the unit cell (~1nm) and the transformation from random coils to thin (~10nm) lamellar crystals. We will use the extended Q range available with Nimrod to obtain neutron scattering data which follows these transformation pathways simultaneously. We wish to build on our extensive experience of directed crystallisation to follow the crystallisation processes within an environment of controlled nucleation using a nucleating agent agent and contrast this with previous experiments