Abstract:

The EPLEXOR 500 dynamic mechanic thermal analysis (DMTA) was used to investigate the effects of static and dynamic loads on storage modulus and loss tangent of T300/epoxy 648 in threepoint bending. The results showed that the storage modulus decreases with increasing dynamic load and increases with increasing static load, and the loss tangent decreases with increase of any one of these two loads. These effects can be enhanced, especially for storage modulus, with decreasing the span or increasing the thickness or width of specimen.

Key words: composites,  , dynamic , viscoelasticity,  , DMTA,  , load,  , dimension , of , specimen