Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Predictive relation for the -relaxation time of a coarse-grained polymer melt under steady shear



Jack F. Douglas, Andrea Giuntoli, Francesco Puosi, Dino Leporini, Francis W. Starr


We examine the influence of steady shear on structural relaxation in a model coarse-grained unentagled polymer melt over a wide range of temperature and shear rates. Shear is found to progressively suppress the α-relaxation process observed in the intermediate scattering function, leading ultimately to a purely inertially dominated β-relaxation at high shear rates. The observed trend upon increasing shear is qualitatively similar to increasing temperature, which likewise diminishes the contribution of the α-relaxation to structural relaxation. Parallel trends with increasing shear rate and temperature are also reflected in the variation of the stretching exponent describing structural relaxation.
Science Advances


polymer melt, relaxation time, intermediate scattering function, shear thinning, beta relaxation, alpha relaxation, suppression of alpha relaxation by shear


Douglas, J. , Giuntoli, A. , Puosi, F. , Leporini, D. and Starr, F. (2020), Predictive relation for the -relaxation time of a coarse-grained polymer melt under steady shear, Science Advances (Accessed June 16, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created April 24, 2020