Analysis of stress-strain data for dry and swollen rubbers by a new tube model of rubber elasticity based on finite chain extensibility

摘要

New stress-strain equations have been extensively tested for both unswollen and swollen rubbers, which were very recently derived front a new non-Gaussian tube model of rubber elasticity that incorporates the effect of finite chain extensibility. Particularly, as core parameters, they involve the junction-fluctuation suppression parameter (h) of Dossin and Grassley and the tube deformation index (gamma) of Gaylord. The best-fits of the equations to experimental literature data for unswollen and swollen networks have been done. The results are very good with sufficiently small departures of theory from experiment and the two fitting parameters can consistently well explain the molecular situations of the networks.