Char compression strength

Figure 9. Effect of the pyrolysis temperature on the compression strength of char ((Q) MP test (A) PP test)...

EG leads to formation of a char layer characterised by the presence of worms resulting from its expansion. It was found that the higher the filler content the lower the compression strength. The presence of APP or MC results in worsening of thermal conductivity while the presence of EG leads to an increase in thermal conductivity. Cone calorimetry and the LOI test were used to study the fire behaviour. The best... 

In that frame, the use of a plane-plane rheometer has been evaluated. The purpose of the experiment carried out in the rheometer is not to mimic fire testing (this is not possible since the heating rate [slow ramp vs. quenching], heating source [convection vs. radiation], sample size, and boundaries effect are different) but to develop a test method that will permit the characterization of the char strength when exposed to pressure (in that case compression force). 

---