Lifetime and network relaxation time of a HEUR-C20 associative polymer system

Evaluation of a transient network model for telechelic associative polymers

“…The onset of a second relaxation mechanism can indeed be seen in Fig. 1b as well as in some published data [39]. Slowing down the relaxation time of the pendant chains would also promote the 'hopping mechanism' as explained in Section 3.…”

Necessary conditions for shear thickening in associating polymer networks

“…In contrast, these systems reveal relatively simple linear viscoelasticities described in terms of the Maxwell model with a single relaxation time [2,3,6,11]. From the viewpoint of scientific as well as industrial interests, the molecular origin of shear thickening has been debated over the past two decades on the basis of experimental [6,7,10,12,13] and theoretical [14][15][16][17][18][19][20] evidences and computer simulations [21][22][23].…”

Self-Healing Hydrogels Formed via Hydrophobic Interactions

“…where U xl is the average dissociation energy of a single association (~10 2 kJ mol À1 [44,100]), ν e is the cross-linking density of the gel (i.e., the concentration of elastically effective hydrophobic associations), and f ν is the fraction of associations broken during the loading. The cross-linking density of the hydrogels, ν e , can be estimated from their shear moduli, G [101,102]:…”