Synergistic flame‐retardant effect of DOPO ‐based derivative and organo‐montmorillonite on glass‐fiber‐reinforced polyamide 6 T

2020 ◽  
Vol 31 (9) ◽  
pp. 2083-2093
Author(s):  
Weijiang Huang ◽  
Wei Yan ◽  
Wentao He ◽  
Kui Wang ◽  
Lijuan Long ◽  
...  
Keyword(s):  
Glass Fiber ◽  
Flame Retardant ◽  
Polyamide 6 ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Synergistic Flame Retardant

Study on the Properties and Mechanism of Flame Retarded Glass Fiber Reinforced Polyamide 6 with Microcapsulated Aluminum Hypophosphite

2014 ◽  
Vol 1033-1034 ◽  
pp. 916-920 ◽  
Author(s):  
Hai Shan Tang ◽  
Yi Lun Tan ◽  
Ning Ping Wang ◽  
Lang Ping Xia ◽  
Jie Zhu ◽  
...  
Keyword(s):  
Glass Fiber ◽  
Flame Retardant ◽  
Flame Retardants ◽  
Mechanical Performance ◽  
Polyamide 6 ◽  
Mechanical Tests ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Flame Retarded ◽  
Aluminum Hypophosphite

Aluminum hypophosphite can be used to flame retard glass fiber reinforced polyamide 6 (GFPA6). TGIC microcapsulated AlHP (T-AlHP) and epoxy resin microcapsulated AlHP (E-AlHP) were made and put into GFPA6. The vertical burning tests and mechanical tests were taken to study the flame retardant performance and mechanical properties of the corresponding composites. Addition of either T-AlHP or E-AlHP resulted in an increased UL-94 rating and a decreased comprehensive mechanical performance. T-AlHP endowed GFPA6 a better flame retardancy than E-AlHP did. TG showed the decomposition behaviors of T-AlHP, E-AlHP, and the corresponding composites. From Py-GC/MS, the detailed pyrolysis products of flame retardants and the flame-retardant composites were identified. Finally, the properties and mechanism of flame retarded GFPA6 with these two kinds of microcapsulated Aluminum Phosphate were summarized.

scholarly journals Synergistic Charring Flame-Retardant Behavior of Polyimide and Melamine Polyphosphate in Glass Fiber-Reinforced Polyamide 66

Polymers ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1851 ◽  
Author(s):  
Wei Tang ◽  
Yanfang Cao ◽  
Lijun Qian ◽  
Yajun Chen ◽  
Yong Qiu ◽  
...  
Keyword(s):  
Heat Release ◽  
Glass Fiber ◽  
Flame Retardant ◽  
Fiber Reinforced ◽  
Polyamide 66 ◽  
Limiting Oxygen Index ◽  
Char Layer ◽  
Glass Fiber Reinforced ◽  
Index Value ◽  
Synergistic Flame Retardant

The synergistic charring, flame-retardant behavior of the macromolecular charring agents polyimide (PI) and melamine polyphosphate (MPP) were studied in glass fiber-reinforced polyamide 66 (PA66). This kind of synergistic charring effect is explained by the fact that PI performed better char-forming ability while working with phosphorus content. The research results showed that, compared with the incorporation of individual MPP, MPP/PI with an appropriate ratio exhibited better flame retardancy and better charring ability. A blend of 11.9%MPP/5.1%PI/PA66 possessed an increased LOI (limiting oxygen index) value of 33.9% and passed the UL94 V-0 rating, obtained a lower peak heat release rate value (pk-HRR), a lower total heat release (THR) value, a lower total smoke release (TSR) value, and a higher residue yield. The results verified the synergistic flame-retardant effect between MPP and PI in the PA66 composite. Melamine polyphosphate and PI jointly interacted with PA66 matrix and locked more carbonaceous compositions in residue and formed a more compact char layer, resulting in a reduced burning intensity and a reduction in the release of fuels. Therefore, the enhanced flame-retardant effect of the MPP/PI system is attributed to the higher charring ability and stronger barrier effect of the char layer in PA66 in the condensed phase.

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