SIMULATION OF FORCES ON ENTANGLED POLYMERS DUE TO SLIPPAGE

We consider the force on the end of a polymer chain being pulled through a network at velocity v, using computer simulations. We develop algorithms for measuring the force on the end of the chain using lattice models of polymers. Our algorithm attaches a spring to the end being pulled and uses its average extension to calculate the force. General problems associated with the use of lattice models in obtaining forces are discussed. Variants of this method are used to obtain upper and lower bounds to the force. The results obtained are in agreement with recent analytical predictions and experiments. © 1995 American Institute of Physics.