Mass spectra at different

Fig. 13.10. mvariant mass spectra at different CM energies shewing... 

Li et al. reported a new application of synchrotron VUV photoionisation MS in thermal decomposition studies of polymers, and displayed its good performance in product analysis helpful to understand the thermal decomposition mechanisms of PVC and PS, extensible to other synthetic polymers. Pyrolysis products of PVC and PS formed at different temperatures were identified by the measurement of photoionisation mass spectra at different photon energies. The experimental results showed the differences of the pyrolysis product pool of PVC at different temperatures, and established that the thermal decomposition process occurred into two steps the low-temperature step to form HCl and benzene, and the high-temperature stage to form several large aromatic hydrocarbons. For the thermal decomposition of PS, four reaction categories were determined [181]. 

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