DETERMINATION OF PHYSICAL AND STRUCTURAL PARAMETERS BY DMA AND DSC - APPLICATION TO AN EPOXIDIC FORMULATION

Mechanical behaviour play an important role in the election of an epox idic formulation of well determined properties as it has a marked infl uence on both structural and external factors. Temperature and time st rongly act on polymers properties owing to their viscoelastic nature. Knowledge of the dynamic moduli and properties of polymeric materials is indispensable for the design of this materials. At the same time, t he influence of the temperature on polymers behaviour may be studied o nce the activation energy is known. In this paper the different dynami c moduli and activation energy are measured using a Perkin Elmer DMA 7 . The relationships between the dynamic mechanical properties and the molecular weight of the polymers make possible the calculation of the molecular weight. Results reasonably agree with literature values.