Bismaleimide (BMI) is a thermosetting polymer resin seeing increased use in aerospace applications. This is primarily due to its high mechanical strength, high-temperature stability, low corrosiveness, and easy handling. These properties set BMIs apart from other industrial resins as BMIs outperform epoxies in both strength and anticorrosiveness, and have easier processing capabilities in comparison to other high-strength resins. When reinforced with glass or carbon fibers, BMI-based composite systems provide high-strength, low-weight alternatives to many metals or alloys commonly used in aerospace applications. Nondestructive techniques to evaluate the effects of aging on polymer composite systems are still being developed, however. In this work, methods of broadband dielectric spectroscopy and photoacoustic Fourier transform infrared spectroscopy (FTIR) are used to evaluate the degradation due to thermo-oxidative aging, expressed through mass loss and interlaminar shear strength (ILSS) values, of a BMI/glass fiber composite system. Full detail is provided in .
1. Gardiner, H., “BMI and benzoxazine battle for future OOA aerocomposites,” High-Performance Composites ,
Vol 22 (1), 2014.
2. Stenzenberger, H., “Bismaleimide resins,” ASM Handbook , Volume 21, 2001.
3. Daily, C., and Nicola Bowler, “Dielectric and Infrared Inference of Thermo -Oxidative Aging of a Bismaleimide
Composite Material,” submitted to: Composites Part B: Engineering , 2016.
4. ASTM Standard D3846-08, Standard Test Method for In-Plane Shear Strength of Reinforced Plastics, ASTM
International, West Conshohocken, PA, 2008.
5. Adams, D.F., “The double -notch shear test specimen for composite materials,” High-Performance Composites ,
Vol 21 (5), 2013.
6. “4300 Handheld FTIR,” https://www.agilent.com/en-us/products/ftir/ftir-compact-portable-systems/4300-
7. Sheldon, Robert T., and Nicola Bowler, “Dielectrometry Sensors for Nondestructive Testing of Glass-fiber
Polymer-matrix Composites,” Materials Evaluation , Vol 72 (11), 2014.
30 Page Views
0 PDF Downloads
0 Facebook Shares