No abstract

The study presented addresses the fire behaviour of polypropylene compounded with six classes of flame retardants. The application of cone calorimetry for the assessment of the thermal characteristics of the tested materials and their comparison with thermogravimetry are the central point of this research. This study only presents data for 25 kW/m2 of incident heat flux exposure and includes five tests for polypropylene with no additives and five tests for polypropylene with flame retardants based on triglycidylisocyanurate and lignin. The data collected include the rate of heat release, mass loss rate, char yield, time to ignition and time of total combustion. Results represent meaningful comparison between the behaviour of the materials under simulated fire conditions, using the cone calorimeter, and in the slow dynamic environment utilized in thermogravimetric analysis. © 1998 John Wiley & Sons Ltd.

Two adducts based on triglycidyl isocyanurate and phosphoric or boric acid have been compared by means of thermogravimetric analysis to investigate their activity as flame retardants and thermostabilizing agents respect to polypropylene. Better behaviour of phosphoric acid adducts have been observed.

The bulk reactions between triglycidylisocyanurate (TGI) and boric acid, at molar ratios from 5:1 to 1:2 have been studied by Differential Scanning Calorimetry (DSC). The obtained materials were used as additives of polyolefins and the added polymers were investigated by Thermogravimetry (TG) in air in order to observe the variations of their thermal stability with varying the boric acid content. The additives show to increase the degradation temperature of polypropylene, polyethylene and polystyrene.