Thesis
Spanish
ID: <
http://hdl.handle.net/10251/149430>
Abstract
[EN] This work focuses on the synthesis and characterization of a green and renewable polyelectrolyte complex (PEC) containing phosphorus, nitrogen and carbon elements, based on the ionic complexation between chitosan (CS) and phytate ion. Introduction of this PEC to bio-epoxy resins, as sustainable flame retardant materials for the railway and aeronautical sector, leads to an improvement of the flame retardant properties. Thermogravimetric tests show an increase of more than 280°C in the total decomposition temperature of the PEC, with respect to the CS, and a percentage of char of 27% wt. at a temperature of 900°C. The incorporation of 20phr of PEC with 40phr of modified ammonium polyphosphate, APPm, into the bio-epoxy resin, (Bioepoxy/40APPm/20PEC) led to an improvement in the fire resistance of the material. The Bio-epoxy/40APPm/20PEC system showed a reduction of the total heat released, THR, of 90% compared to the bio-epoxy resin without additive, and 50% compared to the bioepoxy resin loaded only with 60phr of APPm, according to the cone calorimetry tests carried out. TFGM