Scaling Behavior of Anisotropy Relaxation in Deformed Polymers
Abstract
Drawing an analogy to the paradigm of quasi-elastic neutron scattering, we present a general approach for quantitatively investigating the spatiotemporal dependence of structural anisotropy relaxation in deformed polymers by using small-angle neutron scattering. Experiments and non-equilibrium molecular dynamics simulations on polymer melts over a wide range of molecular weights reveal that their conformational relaxation at relatively high momentum transfer and short time can be described by a simple scaling law, with the relaxation rate proportional to . This peculiar scaling behavior, which cannot be derived from the classical Rouse and tube models, is indicative of a surprisingly weak direct influence of entanglement on the microscopic mechanism of single-chain anisotropy relaxation.
Cite
@article{arxiv.1802.09002,
title = {Scaling Behavior of Anisotropy Relaxation in Deformed Polymers},
author = {Christopher N. Lam and Wen-Sheng Xu and Wei-Ren Chen and Zhe Wang and Christopher B. Stanley and Jan-Michael Y. Carrillo and David Uhrig and Weiyu Wang and Kunlun Hong and Yun Liu and Lionel Porcar and Changwoo Do and Gregory S. Smith and Bobby G. Sumpter and Yangyang Wang},
journal= {arXiv preprint arXiv:1802.09002},
year = {2018}
}