The images in Figure 7 illustrate the photographs and SEM images of the specimens post cone
calorimetery testing. As expected, the unfilled UP rapidly decomposed, which was accompanied
by numerous bubbling on the sample surface. At the end of the test, a small amount of residual
char was left (Figure 7(a)), indicating poor carbonization. The sample with CNTs (Figure 7(b))
showed the least amount of residual char, which was thought to be due to the CNTs conducting
the heat throughout the material and thus accelerating the decomposition process.