We will exploit the powerful and unique capability of NIMROD to follow in a time-resolving manner the crystallisation of polyethyleneoxide (PEO). There are three key length scales: the first involves the thin (10nm) lamellar crystals, the second are the crystal planes (1nm) and the third is the local chain conformation (0.1nm). For the latter, PEO crystallises in a helical conformation which tests have shown gives a specific imprint to the scattering. The ability to obtain time-resolving scattering data over an extensive Q range which encompasses all these length scales simultaneously brings new light to the transformation of polymer structures. We will tightly couple the scattering data to computational molecular modelling procedures developed at Reading to extract quantitative parameters which describe the reorganisation of the polymer structure during crystallisation.