On the dynamics of moderately and lightly crosslinked polymer networks

摘要: The relaxation behavior of networks, where the entanglement density is comparable with crosslink density, can be explained by a broad distribution lengths network chains. A stretched exponential obtained fractional exponent 1/3. — In case lightly corsslinked systems influence entanglements on dynamics tagged chain investigated. It assumed that viewed as cooperative stochastic process. mode coupling ansatz ued which yields nonuniversal scaling characteristic time form: τ N =τ 0 · y , γ depends averaged distance. Moreover, function represented function: g(t) ∞ e −(t/GtN) β. β also density.