Probing the nonequilibrium dynamics of stress, orientation, and entanglements in polymer melts with orthogonal interrupted shear simulations

• Published in: Journal of rheology (New York : 1978) Vol. 66; no. 3; pp. 619 - 637
• Main Authors: Galvani Cunha, Marco A., Olmsted, Peter D., Robbins, Mark O.
• Format: Journal Article
• Language: English
• Published: 01.05.2022
• Subjects: rheology; entanglements; Polymers; molecular dynamics; reptation

Both entangled and unentangled polymer melts exhibit stress overshoots when subject to shearing flow. The size of the overshoot depends on the applied shear rate and is related to relaxation mechanisms such as reptation, chain stretch, and convective constraint release. Previous experimental work sh...