Thermal and fire degradation of recycled and polluted polypropylene‐based materials

Delaval, Damien; Casetta, Mathilde; Delobel, René; Traisnel, Michel; Guillet, Jacques; Raveyre, Claude; Bourbigot, Serge

doi:10.1002/app.29775

Cited by 5 publications

(4 citation statements)

References 33 publications

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“…The recycling process induces a reduction of the peak of RHR (PRHR) and an increase of the time to ignition. In a previous paper,17 it has been shown that the main change in the polymer structure brought by the recycling step is a scission of PP chains. As the polymeric chains are shorter, a better distribution of heat inside the material is obtained during the cone calorimeter experiment.…”

Section: Resultsmentioning

confidence: 99%

“…Granulates were then injected at 230°C into an injection molding machine Billion Visumat 1 000 for making sheets of 300 × 100 × 3 mm 3 . The details of experimental conditions and the choice of the number of extrusion cycles have been discussed in a previous paper 17. To make the intumescent formulations, AP765 supplied by Clariant and a commercial grade of ZB supplied by Rio Tinto Minerals were selected.…”

Section: Experimental Partmentioning

confidence: 99%

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Influence of the Recycling Process on the Fire‐Retardant Properties of PP/EPR Blends

Casetta

Delaval

Traisnel

et al. 2011

Macro Materials & Eng

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The fire‐retardant properties of a recycled poly(propylene)‐based material were investigated and compared to the non‐recycled formulation. An intrinsic intumescent system and zinc borate were used to flame‐retard these polymers. By mass loss calorimetry, the best results were obtained with 20 wt.‐% of additives. Synergisms between AP765 and ZB were observed in the non‐recycled blends but not in the recycled ones. Solid‐state NMR showed that chemical reactions during the decomposition process were leading to the formation of borophosphates, reinforcing the efficiency of the intumescent char. From a ‘physical’ point of view, it was shown that the fire retardant properties of the materials are related to the formation speed of the intumescent structure and not on the char thickness. magnified image

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Section: Resultsmentioning

confidence: 99%

Section: Experimental Partmentioning

confidence: 99%

Influence of the Recycling Process on the Fire‐Retardant Properties of PP/EPR Blends

Casetta

Delaval

Traisnel

et al. 2011

Macro Materials & Eng

Self Cite

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“…Therefore, the external heat flux of 35 kW/m 2 was used for the cone calorimeter test. This heat flux corresponds to the common heat flux in the mild fire scenario [23]. Through the cone calorimeter test, the HRR and the smoke production rate (S ) were measured based on ISO5660-1 and ISO5660-2.…”

Section: Measurement Of Cone Calorimetermentioning

confidence: 99%

Combustion behavior and application of polyolefin‐based floor sheet laminated with Nylon‐6/clay nanocomposites film

et al. 2011

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SUMMARYNanocomposites are potential materials that can be used to improve the flame resistance of polymers without the need for halogen-based flame retardants. However, the nanocomposites cannot be used as the only raw material to produce final products as they are too expensive compared with low-cost commodity plastics. Therefore, some types of polyolefin-based floor sheet laminated with nanocomposites film were prepared for the cone calorimetric study to determine the suitable nanocomposites laminated structure for flame resistance. This study found that the polyolefin-based floor sheet laminated with 200 m Nylon-6/montmorillonite nanocomposites film on the surface can reduce the HRR max and the S max significantly; other types of nanocomposites film-laminated floor sheet were not able to reduce their flame resistance in comparison with the normal Nylon-6 film-laminated floor sheet. Meanwhile, based on the gas barrier performance, the higher aspect ratio of clay is assumed to contribute to the higher flame resistance of nanocomposites. Thus, the polyolefin-based floor sheet laminated with Nylon-6/sericite nanocomposites film on the surface was also prepared and examined in the cone calorimetric study. However, the Nylon-6/sericite nanocomposites film surface-laminated floor sheet did not cause a significant reduction in the HRR max and S max compared with the Nylon-6/montmorillonite nanocomposites film surface-laminated floor sheet. The grade determined according to the standard fire test and the mechanical properties of the Nylon-6/montmorillonite nanocomposites film surface-laminated floor sheet satisfied the requirements for floor sheets for Japanese railway vehicles.

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“…Therefore, an external heat flux of 35 kW/m 2 was used for the cone calorimeter test. This heat flux corresponds to the common heat flux in a mild fire scenario [11]. Through the cone calorimeter test, the heat release rate (HRR) and the smoke production rate (S'') were measured according to ISO5660-1 and ISO5660-2.…”

mentioning

confidence: 99%

Application of Nanocomposites to Floor Sheet for Railway Vehicle

et al. 2011

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Thermal and fire degradation of recycled and polluted polypropylene‐based materials

Cited by 5 publications

References 33 publications

Influence of the Recycling Process on the Fire‐Retardant Properties of PP/EPR Blends

Influence of the Recycling Process on the Fire‐Retardant Properties of PP/EPR Blends

Combustion behavior and application of polyolefin‐based floor sheet laminated with Nylon‐6/clay nanocomposites film

Application of Nanocomposites to Floor Sheet for Railway Vehicle

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