Rheological study of transient networks with junctions of limited multiplicity

摘要: We theoretically study the viscoelastic and thermodynamic properties of transient gels comprised telechelic associating polymers. extend classical theories networks so that correlations among polymer chains through network junctions are taken into account. This extension enables us to investigate how rheological quantities such as elastic modulus, viscosity, relaxation time affected by association equilibrium, these related aggregation number (or multiplicity) junctions. In this paper, we assume, in conventional manner, elastically effective if both their ends connected with other chains. It is shown dynamic shear moduli well described terms Maxwell model. As a result correlation, reduced (moduli divided concentration) increase concentration, but become independent concentration high-concentration range. The fraction pairwise larger at lower concentrations, indicating presence concatenated system, which decreases increases. leads increases concentration.