Interaction via diffusion of polymer crystals in growing spherulites.

Previous calculations of how diffusion ranges should be averaged when polymer molecules of various lengths are segregated at crystal growth fronts have been extended. Crystals of acicular or lamellar habit are addressed directly, necessarily using more approximate methods, and earlier conclusions regarding appropriate averaging are reaffirmed. Results also lead to better understanding of why crystalline texture in polyethylene spherulites scales with averaged diffusion range at crystallization temperatures within regime II but not at higher temperatures within regime I.