SEGMENTAL DYNAMICS OF POLYMERS - INFLUENCE ON MATERIAL PROPERTIES

The segmental dynamics inside a polymer chain is described at first by considering the types of motions which can be performed and the corresponding motional models. Fluorescence Anisotropy Decay and Nuclear Magnetic Relaxation are two very convenient techniques. Results obtained on a series of polymers with low Tg's are presented and discussed. Local motions in solid polymeric materials and their influence on mechanical properties (viscoelasticity, modulus and plastic deformation) are illustrated in the case of model epoxy resins.