Maze running into intumescence: mechanistic aspects in polypropylene

Bourbigot, Serge; Sarazin, Johan; Solarski, Fabienne; Jimenez, Maude

Type de document :

Communication dans un congrès avec actes

DOI :

10.1088/1742-6596/1107/3/032001

URL permanente :

http://hdl.handle.net/20.500.12210/2744

Titre :

Maze running into intumescence: mechanistic aspects in polypropylene

Auteur(s) :

Bourbigot, Serge [Auteur]

Unité Matériaux et Transformations - UMR 8207 [UMET]
Sarazin, Johan [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Solarski, Fabienne [Auteur]

Unité Matériaux et Transformations - UMR 8207 [UMET]
Jimenez, Maude [Auteur]

Unité Matériaux et Transformations - UMR 8207 [UMET]

Titre de la manifestation scientifique :

3rd European Symposium on Fire Safety Science, ESFSS 2018

Ville :

Nancy

Pays :

France

Date de début de la manifestation scientifique :

2018-09

Titre de la revue :

Journal of Physics: Conference Series

Nom court de la revue :

J. Phys.: Conf. Ser.

Éditeur :

IOP Publishing

Date de publication :

2018-11

ISSN :

1742-6588
1742-6596

Discipline(s) HAL :

Chimie/Matériaux

Résumé en anglais : [en]

The concept of intumescence was applied to make flame retarded polypropylene (PP). This paper examines two types of intumescence in PP) based on expandable graphite (EG, physical expansion) and on modified ammonium ...
Lire la suite >The concept of intumescence was applied to make flame retarded polypropylene (PP). This paper examines two types of intumescence in PP) based on expandable graphite (EG, physical expansion) and on modified ammonium polyphosphate (AP760, chemical expansion). Reaction to fire of PP containing EG and AP760 was first evaluated by cone calorimetry. The incorporation of intumescent additives at relatively low loading (10 wt%) in PP permits the reduction by 70% of pHRR. The mode of action occurs via the formation of an expanded carbonaceous layer in all cases. The protective coating acts mainly as heat barrier in the case of the formulations containing AP760 or as heat dissipater with EG. The incorporation of small amount of EG in PP-AP760 modifies heat transfer in the coating creating a strong anisotropy. Upon expansion graphite worms align normal to the surface increasing the transverse heat conductivity (lower efficiency of the heat barrier) and hence, decreasing the fire performance (decrease by only 30% of pHRR). Kinetic analysis was then performed to quantify the thermal stability of the intumescent systems. It reveals that the intumescent additives do not modify the reactional scheme of the PP thermal decomposition but they increase slightly the thermal stability of the intumescent systems.Lire moins >

Langue :

Anglais

Audience :

Internationale

Projet Européen :

MULTI-CONCEPTUAL DESIGN OF FIRE BARRIER: A SYSTEMIC APPROACH

Établissement(s) :

Université de Lille
ENSCL
CNRS
INRA

Collections :

Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Ingénierie des Systèmes Polymères

Date de dépôt :

2019-01-07T11:53:17Z
2019-03-27T10:28:11Z

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Bourbigot_2018_J._Phys.__Conf._Ser._1107_032001.pdf
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Ce document est diffusé sous licence Attribution 3.0 United States

Numéro de version	Lien	Date de modification
2	20.500.12210/2744*	2019-03-27T10:26:01Z
1	20.500.12210/2744.1	2019-01-07T11:53:17Z

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