The degradation of a thermally-aged bismaleimide-glass fiber composite system was assessed via spectroscopic methods. Composite samples were subjected to accelerated isothermal aging at temperatures (275, 300, 325, 350 and 375 ^°C) near or above the suggested upper usage limit of 290 °C. Broadband dielectric spectroscopy was used to measure changes in the dielectric spectra of aged composites from 1 kHz to 2 MHz, while chemical changes in the resin were identified with Fourier transform infrared photoacoustic spectroscopy. Additionally, samples were mechanically assessed via a double-notch compression test. Relationships between the dielectric, photoacoustic, and mechanical properties were inferred from the results.

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isothermal dielectric spectroscopy doublenotch compression dielectric photoacoustic and mechanical results bismaleimideglass fiber composite system fourier transform infrared

Roger W. Jones, Dan J. Barnard, John F. McClelland, Nicola Bowler,Connor Daily,.Dielectric and infrared inference of thermo-oxidative aging of a bismaleimide composite material. 101 (0),167-175.

Roger W. Jones, et al."Dielectric and infrared inference of thermo-oxidative aging of a bismaleimide composite material" 101

Roger W. Jones, Dan J. Barnard, John F. McClelland, Nicola Bowler,Connor Daily,"Dielectric and infrared inference of thermo-oxidative aging of a bismaleimide composite material"