Energy equation and the crystallization kinetics of semi-crystalline polymers: regimes of coupling

摘要: Abstract The processing conditions play an important role in the development of crystallinity thermoplastic polymers and energy equation describing heat transfer problem can be strongly coupled to material kinetics. In this paper, importance nature coupling is evaluated by comparing temperature distributions obtained from a fully zone model (considered as most general approach) with two cases: Neumann's solution (sharp interface-moving boundary) one-domain diffusion no generation (uncoupled solution). Two non-dimensional parameters, Stefan's (St) Deborah's (De) numbers, that key determining extent coupling, are isolated. influence its have been demonstrated numerically selected cases. Results parametric studies show De St decide coupling. error made decoupling shown graphically regimes identified where or negligible. Criteria allowing identification presented. Finally, example presented demonstrate for cooling Nylon 6-6 PET, which exhibit fast slow crystallization