Charred Fiberglass Composite
Glass fiber/Resin composites burn at a fairly high temperature.
The resin chars as it burns. The reflectivity indicates the fire reached over 500
Celsius about 932 Fahrenheit but didn't reach the melting point of the glass fiber.
Transmitted Crossed Polars
Definition/Function:
The reflectivity of char increases with the temperature. Reflected darkfield illumination is
required to assess exposure. Transmitted crossed polarized light highlights birefringent
crystalline materials. The edges of the glass fibers are visible because of the high
refractive index difference between the glass fiber and the mounting medium. The angle of
polarization is changed by selective reflectivity at the edge of the fibers.
Significance in the Environment:
Characteristic Features:
Associated Particles:
References:
