We examine the problem of a highly polydisperse polymer melt within the framework of the tube model. Recent ideas on tube dilation in branched polymers are applied to linear melts when polydispersity is very strong. The weight distribution function P (M) and the relaxation modulus G (t) are related by a non-linear integral equation. The case of power-law polydispersity, P (M) ~ M-', is examined in detail and relaxation moduli, G(t), calculated. When 1 < r < 2, G(t) ~ t -2~ where 7 is related to the polydispersity index z via = (z- 1)/(2- z)
Посилання на статтю:
Relaxation behaviour of highly polydisperse polymer melts / T. C. B. McLeish // Polymer. – 1992. – Vol 33. – P. 2852-2854.