Pyrolysis studies of flame retarded plastic systems

摘要: Abstract Two pyrolysis experiments have been utilised to investigate reactions pertinent flame retardant behaviour. Firstly, a mass spectrometric evolved gas analysis technique has used study the influence of decabromodiphenyl oxide (DBDPO) and synergists antimony zinc borate on activation energy for monomer (i.e. fuel) evolution from polystyrene composites. When was compounded with all three additives, negative value −82.5 ± 5.0 kJ mol−1 obtained energy. This is explained in terms condensed phase reaction between DBDPO polymer radicals which reduces evolution. The rate former increases more rapidly than latter increasing temperature. As consequence decreased as temperature raised, hence observed Secondly, extremely fast scan capability time-of-flight spectrometer monitor HCl benzene various poly(vinyl chloride) (PVC) composites subjected very large rapid rise due pulsed laser heating. behaviour correlated smoke density data same materials. It found that decrease can be associated an increase may well indicate additives result rather higher aromatics being produce PVC lower production fire.