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Influence of the Recycling Process on the Fire‐Retardant Properties of PP/EPR Blends
Author(s) -
Casetta Mathilde,
Delaval Damien,
Traisnel Michel,
Bourbigot Serge
Publication year - 2011
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201000334
Subject(s) - intumescent , fire retardant , char , materials science , zinc borate , polymer , cone calorimeter , composite material , decomposition , thermal decomposition , calorimetry , fire performance , chemical engineering , pyrolysis , fire resistance , organic chemistry , chemistry , physics , engineering , thermodynamics
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.