F. Fraga et al., DETERMINATION OF PHYSICAL AND STRUCTURAL PARAMETERS BY DMA AND DSC - APPLICATION TO AN EPOXIDIC FORMULATION, Journal of thermal analysis, 41(6), 1994, pp. 1543-1550
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.