Physical Properties of Polymers

American Chemical Society amorphous annealed behavior branched carbon chain length chain units Chem coefficient components conformation constant cooling copolymers Copyright cross-links curve decrease deformation degree of crystallinity density dependence diluent effect elastomer elongation energy enthalpy of fusion entropy of fusion Equation equilibrium example excess free volume frequency FTIR function glass transition temperature homopolymers increase interfacial J. E. Mark kinetic Koenig lamellae linear polyethylene liquid loss tangent Macromolecules Mandelkern materials melting temperature modulus molecules morphology N₁ network chains normal stress observed obtained P. J. Flory PDMS networks permission from Ref Phys plot poly polyethylene polymeric polystyrene properties quenched random random coil region relatively relaxation Reproduced from Ref Reproduced with permission Rubber sample shear rate shear stress short chains shown in Figure spectra spectroscopy spectrum spherulites strain studies supermolecular structure swell ratio theory thermodynamic tion ture typical viscoelastic viscosity