Evaluación del comportamiento mecánico de compuestos PEI – fibra de vidrio ante solicitaciones térmicas

The mechanical behavior of a composite with thermoplastic matrix and glass fiber reinforcement has been studied. It has been tested to constant stresses of a value equivalent to tensile strength divided by three to 50, 100 and 150 °C, during periods of time between 250 and 3000 minutes. A decrement of the tensile strength and deformation can be observed in the three temperatures. Also a group of specimens have been exposed to accelerated aging in an environmental chamber to 70 °C and 95% RH, during 30 days; and after they have been tested. In that case a decrement of the strength and deformation after 250 minutes has been observed, but in larger time of exposure these properties suffered an increment.