Thermally activated breakdown in a simple polymer model

Abstract

We consider the thermally activated fragmentation of a homopolymer chain. In our simple model the dynamics of the intact chain is a Rouse one until a bond breaks and bond breakdown is considered as a first passage problem over a barrier to an absorbing boundary. Using the framework of the Wilemski-Fixman approximation we calculate activation times of individual bonds for free and grafted chains. We show that these times crucially depend on the length of the chain and the location of the bond yielding a minimum at the free chain ends. Theoretical findings are qualitatively confirmed by Brownian dynamics simulations.

References in corpus (4)

• Cyclization of a Polymer: A First Passage Problem for a Non-Markovian Process
• Thermal breakage of a discrete one-dimensional string
• Accurate statistics of a flexible polymer chain in shear flow
• The role of internal chain dynamics on the rupture kinetics of adhesive contacts

Cited by in corpus (4)

• Thermodynamic Uncertainty Relation Bounds the Extent of Anomalous Diffusion
• Polymer chain scission at constant tension - an example of force-induced collective behaviour
• Thermal Degradation of Adsorbed Bottle-Brush Macromolecules: Molecular Dynamics Simulation
• Thermal Degradation of Unstrained Single Polymer Chain: Non-linear Effects at Work