Title :

A semi-global reaction mechanism for the thermal decomposition of low-density polyethylene blended with ammonium polyphosphate and pentaerythritol

Author(s) :

Coimbra, Alain [Auteur]
Aix Marseille Université [AMU]
Sarazin, Johan [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Bourbigot, Serge [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Institut universitaire de France [IUF]
Legros, Guillaume [Auteur]
Institut de Combustion, Aérothermique, Réactivité et Environnement [ICARE]
Consalvi, Jean-Louis [Auteur]
Aix Marseille Université [AMU]

Journal title :

Fire Safety Journal

Abbreviated title :

Fire Safety Journal

Volume number :

133

Pages :

103649

Publisher :

Elsevier BV

Publication date :

2022-10

ISSN :

0379-7112

English keyword(s) :

Thermal analysis
Intumescence
LDPE
APP/PER
Material flammability

HAL domain(s) :

Chimie/Matériaux

English abstract : [en]

A semi-global reaction mechanism has been developed to capture the decomposition of a polymer, i.e. low-density polyethylene (LDPE) that contains a condensed-phase-active intumescent flame retardant, i.e. ammonium polyphosphate ...
Show more >A semi-global reaction mechanism has been developed to capture the decomposition of a polymer, i.e. low-density polyethylene (LDPE) that contains a condensed-phase-active intumescent flame retardant, i.e. ammonium polyphosphate (APP) mixed with pentaerythritol (PER) with ratio 3:1 (wt/wt). The methodology combines thermogravimetric analysis (TGA) in anaerobic environment over a wide range of heating rates and inverse modeling of these experiments based on the Shuffled Complex Evolution (SCE) optimization algorithm. The decomposition of neat LDPE can be described by a single first-order reaction. In contrast, the decomposition of the APP/PER additive is characterized by strong interactions between the reactants and a 5-step reaction mechanism was designed driven by the mechanisms of the intumescence process. The direct coupling of the 1-step reaction mechanism for LDPE and the 5-step reaction mechanism for APP/PER was found to provide decent predictions for the decomposition of the 90%LDPE/10% APP/PER blend. The slight interactions between the LDPE matrix and the APP/PER additive were taken into account by updating the kinetic parameters of two reactions, leading to a final robust and accurate 6-step reaction model.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS
INRAE
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Ingénierie des Systèmes Polymères

Submission date :

2023-12-12T13:00:44Z
2023-12-13T11:00:27Z
2023-12-13T11:01:37Z