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High‐throughput method for estimating the time to sustained ignition of polystyrene–clay nanocomposites based on thermogravimetric analysis
Author(s) -
Costache Marius C.,
Wilkie Charles A.
Publication year - 2010
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1460
Subject(s) - calorimetry , materials science , ignition system , polystyrene , thermogravimetric analysis , thermogravimetry , differential scanning calorimetry , nanocomposite , composite material , polymer , analytical chemistry (journal) , chemical engineering , thermodynamics , chemistry , organic chemistry , physics , engineering
Polymer‐modified clay nanocomposites were prepared by melt blending and the time to ignition was measured by cone calorimetry at various heat fluxes. Based on these experimental results, a critical mass flux and critical percentage mass loss (pml crit ) for piloted ignition were identified and validated for both virgin polystyrene and its composites, across a wide range of heating fluxes. Based on the assumption that the polymer degradation kinetics in the heating segment of the cone calorimetry (up to the moment of ignition) and thermogravimetry experiments are similar, and using the pml crit , we hypothesized that the onset degradation temperature of the TGA samples (defined here as the temperature at pml crit ) could be used to estimate the time to sustained ignition in cone calorimetry experiments. The onset degradation temperature and the time to sustained ignition showed a good correlation, regardless of the heating flux used in cone calorimetry experiments. Copyright © 2009 John Wiley & Sons, Ltd.