The steady-state compliance Je for the melts scales with Me and Mw as Je∝M0.5e(Mw/Me)0.
Enhanced values of steady-state compliance and elastic indices with respect to those of the pure components were also noted.
It has recently been shown that the linear elastic steady-state compliance Je0 reacts very sensitively on the addition of nanoparticles to a polymer melt.
The rheological behaviour of dilute and semidilute solutions of poly 2-hydroxyethyl methacrylamide) in glycerine is described, empoly 2-hydroxyethyl of the variation of both the zero shear rate viscosity, η0, and the steady-state comethacrylamideinn, Je0, with concentration.
On the basis of the experimental results, the dependence of total molecular weight as well as molecular weight between entanglements has been examined for zero-shear viscosity (η0) and steady-state compliance (Je).
Our results generalize previous ones in three main aspects: a Flory–Huggins expression for the equilibrium contribution to the chemical potential is used instead of the ideal-gas like expression, the full expression for the steady-state compliance of the solution is taken into account instead of only the polymer contribution, and the influence of the solute molecular mass is explicitly considered.
The equilibrium compliance, JC and steady state recoverable compliance JR, were investigated as a function of electric field strength, particle concentration and particle conductivity.
Another set of measurements has been performed on the same materials, collecting for each sample the values of η0 (zero shear viscosity) and Je0 (steady state creep compliance) by creep creep recovery experiments.
The linear steady-state recoverable compliance of pure PMMA is independent of annealing as it reflects only polymer-polymer interactions.
It was also found that long-chain branches increase the elasticity of melt characterized by the steady-state recoverable compliance and the storage modulus.
The linear steady-state elastic compliance is found to be Je0 = 1.9 × 10−5 Pa−1 for the aPS and Je0 = 2.5 × 10−4 Pa−1 for the PS 158K, which is in agreement with the literature.
