An Insight into the Flammability of Some Bio-Based Polyesters

Abstract

Abstract:The heat release capacity of polymers can be generally predicted using a method based on the additivity of group contributions (the Van Krevelen approach). Nevertheless, there are some exceptions, evidencing that this approach is insufficient and must be completed. In this study, the kinetic triplet accounting for the description of pyrolysis is identified for 11 polymers. Activation energy and the frequency factor are calculated using Kissinger's method. Reaction models are chosen among the Avrami-Erofeev functions. The high flammability of poly(3-hydroxybutyrate) and the underestimation of its heat release capacity using the Van Krevelen approach are explained from these parameters. The results highlight the possibility of improving the model, using additional but easily accessible data.

Halloysite nanotubes (HNTs)/polymer nanocomposites: thermal degradation and flame retardancy

“…For example, the phosphorus content of char from PP/IFR containing kaolinite nanoroll was higher than that of PP/IFR containing plate-like kaolinite, which could explain the better results measured in cone calorimetry with nanoroll [83]. According to Dumazert et al [86], HNT does not remain stable during burning in cone calorimetry at an irradiance of 50 kW/m². The authors studied PBS filled with phosphorus flame retardants and sepiolite or HNT.…”

“…Dumazert et al [86] have calculated the phosphorus fraction remaining in residues from PBS filled with APP or aluminum diethylphosphinate and HNTs. The presence of HNT allowed a fall in the phosphorus content when APP was used.…”