Fire behavior of flame retarded unsaturated polyester resin with high nitrogen content additives

Publication date: Available online 26 January 2020Source: Polymer TestingAuthor(s): Kamila Salasinska, Maciej Celiński, Mateusz Barczewski, Michał K. Leszczyński, Monika Borucka, Paweł KozikowskiAbstractThe novel flame retarded unsaturated polyester resins have been developed and prepared by introduction of high nitrogen content additives into the polymer matrix in order to verify their effectiveness in the formation of swollen carbonaceous char inhibiting the burning process of the polymer. The intumescent flame retardants (IFRs) based on mixture or metal complex were developed and characterized by particle size distribution, Fourier-transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR), powder X-ray diffraction (XRD), elemental analysis (CHN) and thermogravimetric analysis (TGA). The evaluation of the efficiency of IFRs addition on the flammability and smoke emission of the unsaturated polyester resins (UP) was carried out using the fire hazard (UL-94), limiting oxygen index (LOI) and cone calorimeter (CC) tests, as well as smoke density chamber tests. The volatile compounds evolved during the burning of materials were determined using a steady state tube furnace and a gas chromatograph with mass spectrometer. Furthermore, the prepared materials were subjected to differential scanning calorimetry (DSC), thermogravimetric c analysis and water resistance tests. The mechanical properties of the materials were investigated using Shore D hardness and dynam...

Source: Polymer Testing - January 27, 2020 Category: Chemistry Source Type: research