Seidelt et al. have mod- elled the devolatilisation of NR, BR and SBR, including an estimation of the reaction order. As a different approach, Oh et al. modelled SBR devolatilisation using the sum of a zero-, first- and second- order reaction. Conesa et al. focusing on PI, BR and SBR, and Yang et al. modelling NR, BR and SBR, have both used the sam- ple weight in their model-based kinetic expressions, instead of the more generally used conversion ( ̨). The results of all these