While there has been much success in modeling the linear and nonlinear rheology of
monodisperse entangled linear polymers, progress in the constitutive modeling of polymeric
materials continues to lag behind the needs of industry. Industrially sourced polymers are
typically polydisperse (comprising a broad distribution of molecular weights), making their
rheology more suitable for processing but also more difficult to predict. To date, there are no
molecular-based constitutive models that are practically suitable for describing industrially …