Enhancement of fire retardancy properties of glass fibre–reinforced polyesters composites

2019 ◽  
Vol 43 (6) ◽  
pp. 734-746 ◽  
Author(s):  
Monique Amaro Freitas Rocha ◽  
Alexandre Landesmann ◽  
Simone Pereira Silva Ribeiro ◽  
Raíssa Carvalho Martins
Keyword(s):  
Glass Fibre ◽  
Fire Retardancy ◽  
Glass Fibre Reinforced

scholarly journals Fire retardancy effect of aluminium phosphinate and melamine polyphosphate in glass fibre reinforced polyamide 6

e-Polymers ◽  
2010 ◽  
Vol 10 (1) ◽  
Author(s):  
Ulrike Braun ◽  
Horst Bahr ◽  
Bernhard Schartel
Keyword(s):  
Gas Phase ◽  
Glass Fibre ◽  
Phosphinic Acid ◽  
Polyamide 6 ◽  
Fire Retardancy ◽  
Fire Behaviour ◽  
Aluminium Phosphate ◽  
Flame Inhibition ◽  
Glass Fibre Reinforced ◽  
In Fire

AbstractThe fire retardancy mechanism of aluminium diethyl phosphinate (AlPi) and AlPi in combination with melamine polyphosphate (MPP) was investigated in glass-fibre reinforced polyamide 6 (PA6/GF) by analysing the pyrolysis, flammability and fire behaviour. AlPi in PA6/GF-AlPi partly vaporises as AlPi and partly decomposes to volatile diethylphosphinic acid (subsequently called phosphinic acid) and aluminium phosphate residue. In fire a predominant gasphase action was observed, but the material did not reach a V-0 classification for the moderate additive content used. For the combination of both AlPi and MPP in PA6/GF-AlPi-MPP a synergistic effect occurred, because of the reaction of MPP with AlPi. Aluminium phosphate is formed in the residue and melamine and phosphinic acid are released in the gas phase. The aluminium phosphate acts as a barrier for fuel and heat transport, whereas the melamine release results in fuel dilution and the phosphinic acid formation in flame inhibition. The higher amount of aluminium phosphate in PA6/GF-AlPi-MPP stabilised the residue in flammability tests in comparison to PA6/GF-AlPi, so that this material achieved a V-0 classification in the UL 94 test.

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