Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 138, Issue 12, Pages -Publisher
WILEY
DOI: 10.1002/app.50072
Keywords
degradation; flame retardance; manufacturing; thermal properties
Categories
Funding
- College of Polytechnics, Jihlava [1170/4/193]
- Institute of Theoretical and Applied Mechanics [RVO 68378297]
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The addition of a mix of aluminum hypophosphite (AHP) and melamine cyanurate as flame retardant improves the fire performance of PET-G, but can lead to higher smoke release with increasing structural complexity.
Effect of the shape of 3D printed samples on fire behavior of polyethylene terephthalate glycol (PET-G) and PET-G additivated with a mix of aluminum hypophosphite (AHP) and melamine cyanurate as flame retardant, was investigated. The additives improved fire performance (e.g., maximum average rate of heat emission, total oxygen consumption, heat release rate indices) irrespective of structural complexity, favoring carbonaceous char formation. However, at increasing structural complexity, they promoted higher release of smoke, compared to neat PET-G, because of a change in the prevalent retardation mechanism, which became dominated by the flame inhibition action of AHP. Consequently, the synergistic effect obtained combining the two additives, was hindered. Impact of product design on mechanisms of fire retardation helps in devising engineering solutions aimed at meeting required level of fire-safety performance, which should be tailored to the specific product.
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