Intumescent ethylene-vinyl acetate copolymer: Reaction to fire and mechanistic aspects

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

Document type :

Article dans une revue scientifique: Article original

DOI :

10.1016/j.polymdegradstab.2019.01.029

Permalink :

http://hdl.handle.net/20.500.12210/4269

Title :

Intumescent ethylene-vinyl acetate copolymer: Reaction to fire and mechanistic aspects

Author(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]

Journal title :

Polymer Degradation and Stability

Abbreviated title :

Polymer Degradation and Stability

Volume number :

161

Pages :

235-244

Publisher :

Elsevier BV

Publication date :

2019-01-25

ISSN :

0141-3910

HAL domain(s) :

Chimie

English abstract : [en]

The concept of intumescence was applied to flame retard ethylene vinyl acetate copolymer (EVA). The paper examines two types of intumescence based on expandable graphite (EG, physical expansion) and on modified ammonium ...
Show more >The concept of intumescence was applied to flame retard ethylene vinyl acetate copolymer (EVA). The paper examines two types of intumescence based on expandable graphite (EG, physical expansion) and on modified ammonium polyphosphate (AP760, chemical expansion). The incorporation of expandable graphite (EG) at relatively low loading (10 wt%) in EVA permits the reduction up to 65% of peak of heat release rate (pHRR) measured by cone calorimetry. The mode of action occurs via the formation of an expanded carbonaceous layer acting mainly as heat barrier limiting heat and mass transfer as evidenced by the temperature measurement as a function of time during cone calorimetry. The incorporation of small amount of ZnCO3 in EVA-AP760 enhances strongly the performance: pHRR was not reduced using the sole AP760 while it is decreased by 54% when only 2 wt% of AP760 is substituted by ZnCO3. A strong synergistic effect was therefore observed. Solid state NMR of 31P and 13C on cone residues prepared at different characteristic times evidenced the mechanism involved is the reinforcement of the protective char by the formation of phosphate glass limiting the creation of cracks and increasing the char strength.Show less >

Language :

Anglais

Audience :

Internationale

European Project :

MULTI-CONCEPTUAL DESIGN OF FIRE BARRIER: A SYSTEMIC APPROACH

Administrative institution(s) :

Université de Lille
ENSCL
CNRS
INRA

Collections :

Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Ingénierie des Systèmes Polymères

Submission date :

2019-02-23T18:05:33Z
2019-02-25T09:09:13Z
2019-03-21T14:01:47Z

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