TY - JOUR
T1 - Dynamics of molecules adsorbed on a die wall during polymer melt extrusion
AU - Tchesnokov, M.A.
AU - Molenaar, J.
AU - Slot, J.J.M.
PY - 2005
Y1 - 2005
N2 - A new, quantitative model to describe the dynamics of polymer molecules grafted on a solid wall is presented. This model is based on the bond vector probability distribution function (BVPDF) which contains the necessary information about the spatial conformations of the grafted chains. All macroscopic quantities of practical interest such as wall shear stress are shown to follow from second moments of the BVPDF. The derived equation of motion for the BVPDF takes into account all important mechanisms on the grafted chain such as retraction, convection, and (convective) constraint release. The proposed model can further be used to derive the quantitative stick-slip law given the molecular and wall surface parameters. © 2004 Elsevier B.V. All rights reserved.
AB - A new, quantitative model to describe the dynamics of polymer molecules grafted on a solid wall is presented. This model is based on the bond vector probability distribution function (BVPDF) which contains the necessary information about the spatial conformations of the grafted chains. All macroscopic quantities of practical interest such as wall shear stress are shown to follow from second moments of the BVPDF. The derived equation of motion for the BVPDF takes into account all important mechanisms on the grafted chain such as retraction, convection, and (convective) constraint release. The proposed model can further be used to derive the quantitative stick-slip law given the molecular and wall surface parameters. © 2004 Elsevier B.V. All rights reserved.
U2 - 10.1016/j.jnnfm.2004.02.013
DO - 10.1016/j.jnnfm.2004.02.013
M3 - Article
SN - 0377-0257
VL - 126
SP - 71
EP - 82
JO - Journal of Non-Newtonian Fluid Mechanics
JF - Journal of Non-Newtonian Fluid Mechanics
IS - 2-3
ER -