TY - JOUR
T1 - Disentangled State in Polymer Melts; a Route to Ultimate Physical and Mechanical Properties
AU - Rastogi, Sanjay
AU - Kurelec, Lada
AU - Cuijpers, Juul
AU - Lippits, Dirk
AU - Wimmer, Markus
AU - Lemstra, Piet J.
N1 - Generated from Scopus record by KAUST IRTS on 2021-02-16
PY - 2003/12/15
Y1 - 2003/12/15
N2 - The role of entanglements in obtaining a homogeneous product of ultra high molecular weight polyethylene (UHMW-PE) has been explored. Studies performed in this report show that a disentangled state before melting is a prerequisite to obtain homogeneous products of an intractable polymer like UHMW-PE. The disentangled state is obtained directly from the reactor by controlling the polymerisation conditions or in the solid state when there is enhanced chain mobility along the c-axis of a unit cell. The disentangled state is maintained in the melt over a period of time. invoking implications in polymer theology. This approach is applicable to polymers in general. The homogeneous fully sintered UHMW-PE, obtained for the first time, shows a considerable decrease in oxygen permeability, and increase in toughness and fatigue resistance. Such homogeneous products of UHMW-PE are of beneficial in highly demanding applications, especially in knee-prosthesis. where the polymer is used as an inlay between the human bone and a metal or ceramic part, which slides against the polyethylene component during normal gait.
AB - The role of entanglements in obtaining a homogeneous product of ultra high molecular weight polyethylene (UHMW-PE) has been explored. Studies performed in this report show that a disentangled state before melting is a prerequisite to obtain homogeneous products of an intractable polymer like UHMW-PE. The disentangled state is obtained directly from the reactor by controlling the polymerisation conditions or in the solid state when there is enhanced chain mobility along the c-axis of a unit cell. The disentangled state is maintained in the melt over a period of time. invoking implications in polymer theology. This approach is applicable to polymers in general. The homogeneous fully sintered UHMW-PE, obtained for the first time, shows a considerable decrease in oxygen permeability, and increase in toughness and fatigue resistance. Such homogeneous products of UHMW-PE are of beneficial in highly demanding applications, especially in knee-prosthesis. where the polymer is used as an inlay between the human bone and a metal or ceramic part, which slides against the polyethylene component during normal gait.
UR - http://doi.wiley.com/10.1002/mame.200300113
UR - http://www.scopus.com/inward/record.url?scp=0346492805&partnerID=8YFLogxK
U2 - 10.1002/mame.200300113
DO - 10.1002/mame.200300113
M3 - Article
VL - 288
SP - 964
EP - 970
JO - Macromolecular Materials and Engineering
JF - Macromolecular Materials and Engineering
SN - 1438-7492
IS - 12
ER -