Viscoelastic Properties of Polymers

A. V. Tobolsky Applied Phys approximately Bueche bulk calculated Chem Colloid Sci compliance components concentration constant corresponding creep cross-linked curves cycles/sec dashpots deformation diethyl phthalate diluent dynamic dynes/cm² effect elastic entanglement coupling experimental extension factor free volume frequency scale friction coefficient gels glass transition temperature glasslike high molecular weight increasing J. D. Ferry Kolloid-Z linear liquids log G loss tangent magnitude maxima maximum measurements mechanical methacrylate method molecules motion obtained plateau zone polyisobutylene Polymer Sci polymeric polymethyl polymethyl acrylate polymethyl methacrylate polystyrene polyvinyl acetate polyvinyl chloride predicted proportional pseudo-equilibrium range ratio reduced variables relaxation spectrum resonance retardation spectrum Rheology rubberlike sample Section shear modulus shown in Fig side groups simple shear slope solids solutions spectra steady-flow viscosity steady-state strain stress relaxation temperature dependence terminal zone tion torsion transition zone uncross-linked polymers values viscoelastic behavior viscoelastic functions viscoelastic properties wave WLF equation Young's modulus