TY - GEN
T1 - Slip and frictional heating of extruded polyethylene melts
AU - Pérez-González, José
AU - Marín-Santibáñez, Benjamín M.
AU - Zamora-López, Héctor S.
AU - Rodríguez-González, Francisco
N1 - Publisher Copyright:
© 2017 Author(s).
PY - 2017/5/5
Y1 - 2017/5/5
N2 - Extrusion of polymer melts with slip at the die generates frictional heating. The relationship between slip flow and frictional heating during the continuous extrusion of a non-slipping linear low-density (LLDPE) and a slipping high-density polyethylene (HDPE), respectively, both pure as well as blended with a fluoropolymer processing aid (PA), was investigated in this work by Rheo-particle image velocimetry and thermal imaging. Significant rises in temperature were measured under slip and no slip conditions, being these much higher than the values predicted by the adiabatic flow assumption. Clear difference was made between viscous and frictional heating before the stick-slip regime for the LLDPE, even though they could not be distinguished from one another at higher stresses. Such a difference, however, could not be made for the slipping HDPE, since overall in the presence of slip, frictional and viscous heating act synergistically to increase the melt temperature.
AB - Extrusion of polymer melts with slip at the die generates frictional heating. The relationship between slip flow and frictional heating during the continuous extrusion of a non-slipping linear low-density (LLDPE) and a slipping high-density polyethylene (HDPE), respectively, both pure as well as blended with a fluoropolymer processing aid (PA), was investigated in this work by Rheo-particle image velocimetry and thermal imaging. Significant rises in temperature were measured under slip and no slip conditions, being these much higher than the values predicted by the adiabatic flow assumption. Clear difference was made between viscous and frictional heating before the stick-slip regime for the LLDPE, even though they could not be distinguished from one another at higher stresses. Such a difference, however, could not be made for the slipping HDPE, since overall in the presence of slip, frictional and viscous heating act synergistically to increase the melt temperature.
UR - http://www.scopus.com/inward/record.url?scp=85019713968&partnerID=8YFLogxK
U2 - 10.1063/1.4982982
DO - 10.1063/1.4982982
M3 - Contribución a la conferencia
AN - SCOPUS:85019713968
T3 - AIP Conference Proceedings
BT - Novel Trends in Rheology VII
A2 - Zatloukal, Martin
PB - American Institute of Physics Inc.
T2 - 7th International Conference on Novel Trends in Rheology 2017
Y2 - 26 July 2017 through 27 July 2017
ER -