Exploring the Contribution of Two Phosphorus-Based Groups to Polymer Flammability via Pyrolysis-Combustion Flow Calorimetry

Rodolphe Sonnier (1) , Belkacem Otazaghine (1) , Christelle Vagner (2) , Frédéric Bier (3) , Jean-Luc Six (3) , Alain Durand (3) , Henri Vahabi (2)

1 C2MA - Centre des Matériaux des Mines d'Alès
2 LMOPS - Laboratoire Matériaux Optiques, Photonique et Systèmes
3 LCPM - Laboratoire de Chimie Physique Macromoléculaire

From a set of around 100 phosphorus-containing polymers tested in pyrolysis-combustion flow calorimetry, the contributions to flammability of two phosphorus-containing pendant groups (called 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and PO 3) were calculated using an advanced method previously proposed and validated. The flammability properties include total heat release (THR) and heat release capacity (HRC) measured in standard conditions, i.e., anaerobic pyrolysis and complete combustion. The calculated contributions are in good agreement with the main modes of action of both phosphorus groups, i.e., flame inhibition for DOPO and char promotion for PO 3. Moreover, the results provide first conclusions about the cooperative interaction between phosphorus and nitrogen, as well as the influence of the architecture of tested co-polymers.

Mots clés: pyrolysis-combustion flow calorimetry; group contributions; van Krevelen approach; polymer flammability; phosphorus-containing flame retardant

Domaines: Matériaux

Rodolphe Sonnier, Belkacem Otazaghine, Christelle Vagner, Frédéric Bier, Jean-Luc Six, et al.. Exploring the Contribution of Two Phosphorus-Based Groups to Polymer Flammability via Pyrolysis-Combustion Flow Calorimetry. Materials, 2019, 12 (18), pp.2961. ⟨10.3390/ma12182961⟩. ⟨hal-02371662⟩