versión On-line ISSN 0718-0764
CHACON, L.E.; VINA, I.; ARGUELLES, A. y VINA, J.. Influence of Hygrothermal Ageing in the Mechanical Behavior of PEI - Glass Fabric Composites Subjected to Thermal Stresses. Inf. tecnol. [online]. 2004, vol.15, n.5, pp.41-44. ISSN 0718-0764. http://dx.doi.org/10.4067/S0718-07642004000500007.
The mechanical behavior of a composite of polyetherimide (PEI) reinforced with glass fiber fabric (8H Satin) was analyzed. Initially, the material was subjected to accelerated ageing (70ºC and 95%R.H.) in a hygrothermal chamber for 10, 30, 90 and 180 day periods, after which it was subjected to isothermal stress. The value of the stress was a third of the tensile strength and at three different temperatures below the vitreous transition, applied over periods between 250 and 2000 minutes. The samples were then tested by traction. The original non-aged test samples, showed values of strength and deformation (in tests for 750 min. or more) lower than values of the non-aged specimens which had been subjected to isothermal treatment.
Palabras clave : polyetherimide; glass fiber; tensile strength; hygrothermal ageing; mechanical properties.