Resumen

CASSU, Silvana Navarro  y  FELISBERTI, Maria Isabel. Dynamic mechanical behavior and relaxations in polymers and polymeric blends. Quím. Nova [online]. 2005, vol.28, n.2, pp. 255-263. ISSN 0100-4042.  http://dx.doi.org/10.1590/S0100-40422005000200017.

Dynamic mechanical analysis (DMA) is widely used in materials characterization. In this work, we briefly introduce the main concepts related to this technique such as, linear and non-linear viscoelasticity, relaxation time, response of material when it is submitted to a sinusoidal or other periodic stress. Moreover, the main applications of this technique in polymers and polymer blends are also presented. The discussion includes: phase behavior, crystallization; spectrum of relaxation as a function of frequency or temperature; correlation between the material damping and its acoustic and mechanical properties.

Palabras llave : DMA; polymer; polymer blends.