TY - JOUR
T1 - Resolving the mystery of the chain friction mechanism in polymer liquids
AU - Sokolov, Alexei P.
AU - Schweizer, Kenneth S.
PY - 2009/6/15
Y1 - 2009/6/15
N2 - We propose an explanation for the long-standing puzzles of the microscopic mechanism of chain friction and the failure of time-temperature superposition in polymer melts based on decoupling of macromolecular scale diffusion from local structural relaxation due to spatially heterogeneous dynamics. The proposed physical picture is also relevant for understanding some aspects of dynamic fluctuation and decoupling phenomena in nonpolymeric glass-forming liquids, crystal growth rates, and protein activity in viscous solvents.
AB - We propose an explanation for the long-standing puzzles of the microscopic mechanism of chain friction and the failure of time-temperature superposition in polymer melts based on decoupling of macromolecular scale diffusion from local structural relaxation due to spatially heterogeneous dynamics. The proposed physical picture is also relevant for understanding some aspects of dynamic fluctuation and decoupling phenomena in nonpolymeric glass-forming liquids, crystal growth rates, and protein activity in viscous solvents.
UR - http://www.scopus.com/inward/record.url?scp=67249100449&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.102.248301
DO - 10.1103/PhysRevLett.102.248301
M3 - Article
AN - SCOPUS:67249100449
SN - 0031-9007
VL - 102
JO - Physical Review Letters
JF - Physical Review Letters
IS - 24
M1 - 248301
ER -