Multi-scale simulation for melt spinning process - Analysis of entanglement and orientation -
Sato Takeshi (1)*, Taniguchi Takashi (2)
(1) Kyoto university - Kyoto - Japan, (2) Department of Chemical Engineering, Kyoto university - Kyoto - Japan
In the polymer melt spinning process used to create polymer fibers the macroscopic dynamics is
tightly connected to the microscopic state of the polymer chains
through the stress and strain-rate fields. To probe the different
time- and length-scales in the system, it is necessary to use a combined
micro-macro simulation method. In this study, we apply such a multi-scale
simulation to study the polymer spinning process. In our multi-scale
simulations, we use a microscopic model to describe the entanglement
polymer dynamics and a macroscopic model to track the deformation
rate imposed at a material point. For the former, we use a slip-link model, for the latter a
particle-based Lagrangian model. With this approach, we are able to
successfully take into account the memory effects, as well as provide
a quantitative evaluation of the polymer dynamics, including the
effects of entanglement. We performed extensive simulations to study
the relationship between the macroscopic spinning conditions and the
microscopic properties of the melt, such as the orientation and level
of entanglement of the polymer chains.