Journal
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
Volume 130, Issue 2, Pages 1003-1009Publisher
SPRINGER
DOI: 10.1007/s10973-017-6422-1
Keywords
Polypropylene; Synchrotron vacuum ultraviolet photoionization; Pyrolysis; Intumescent flame retardancy
Funding
- National Natural Science Foundation of China [51574009, 51303004, U1332134]
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The pyrolysis of intumescent flame-retardant polypropylene (PP) composites was studied by synchrotron vacuum ultraviolet photoionization combined with molecular-beam mass spectrometry (SVUV-PIMS). Pyrolytic products of intumescent flame-retardant PP composite formed at certain temperature have been identified by the measurement of photoionization mass spectra at different photon energies. By using SVUV-PIMS, some isomers were identified. Meanwhile, the effect of high-efficient flame-retardant synergist-nanoporous nickel phosphate on pyrolytic products of intumescent flame-retardant PP composite was also studied. By analyzing the pyrolysis of the intumescent flame-retardant PP composites with or without the flame-retardant synergist, the synergistic flame-retardant mechanism was discussed as the condensed-phase flame-retardant mechanism not gas flame-retardant mechanism as expected. The studies in this work are much helpful for further understanding the flame-retardant mechanism of intumescent flame-retardant PP composites.
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