Comportamento dinâmico-mecânico e relaxações em polímeros e blendas poliméricas

AUTOR(ES)
FONTE

Química Nova

DATA DE PUBLICAÇÃO

2005-03

RESUMO

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.

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