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Synergistic flame‐retarded effect between carbon nanotubes and ammonium polyphosphate in Nylon6 and Nylon6/polystyrene blends
https://orcid.org/0000-0002-3133-3196
SummaryThe association of carbon nanotubes (CNTs) and ammonium polyphosphate (APP) as flame retardants was utilized for improving the flame retardancy of nylon6 (PA6) and blends of PA6/Polystyrene (PS). A remarkable synergistic effect between APP and CNTs was observed in PA6 at 1‐wt% CNTs loading. Rheological tests showed that 1‐wt% CNTs formed a network structure. Morphology of residue char indicated that a network enhanced synergistic effect. A synergy between APP and CNTs in blends of PA6/PS (56/24) was also investigated. APP and CNTs exhibited a remarkable synergistic effect at 0.25‐wt% CNTs loading, but the antagonistic effect on flame retardancy of blends was observed at 1‐wt% CNTs loading. Transmission electron microscopy showed that CNTs were exclusively dispersed in the PA6 phase of blends. The selective dispersion of CNTs caused the formation of a network at 0.25‐wt% CNTs loading. Morphology of residue char indicated that 0.25‐wt% CNTs were benefited by the formation of a continuous and well‐swollen residue char that enhanced the synergistic effect in blends. However, the aggregation of 1‐wt% CNTs in PA6 phase caused high viscosity of PA6 phase, resulting in a poor expansion of the residue char. Consequently, the antagonism was exhibited.
Synergistic flame‐retarded effect between carbon nanotubes and ammonium polyphosphate in Nylon6 and Nylon6/polystyrene blends
https://orcid.org/0000-0002-3133-3196
SummaryThe association of carbon nanotubes (CNTs) and ammonium polyphosphate (APP) as flame retardants was utilized for improving the flame retardancy of nylon6 (PA6) and blends of PA6/Polystyrene (PS). A remarkable synergistic effect between APP and CNTs was observed in PA6 at 1‐wt% CNTs loading. Rheological tests showed that 1‐wt% CNTs formed a network structure. Morphology of residue char indicated that a network enhanced synergistic effect. A synergy between APP and CNTs in blends of PA6/PS (56/24) was also investigated. APP and CNTs exhibited a remarkable synergistic effect at 0.25‐wt% CNTs loading, but the antagonistic effect on flame retardancy of blends was observed at 1‐wt% CNTs loading. Transmission electron microscopy showed that CNTs were exclusively dispersed in the PA6 phase of blends. The selective dispersion of CNTs caused the formation of a network at 0.25‐wt% CNTs loading. Morphology of residue char indicated that 0.25‐wt% CNTs were benefited by the formation of a continuous and well‐swollen residue char that enhanced the synergistic effect in blends. However, the aggregation of 1‐wt% CNTs in PA6 phase caused high viscosity of PA6 phase, resulting in a poor expansion of the residue char. Consequently, the antagonism was exhibited.
Synergistic flame‐retarded effect between carbon nanotubes and ammonium polyphosphate in Nylon6 and Nylon6/polystyrene blends
https://orcid.org/0000-0002-3133-3196
SummaryThe association of carbon nanotubes (CNTs) and ammonium polyphosphate (APP) as flame retardants was utilized for improving the flame retardancy of nylon6 (PA6) and blends of PA6/Polystyrene (PS). A remarkable synergistic effect between APP and CNTs was observed in PA6 at 1‐wt% CNTs loading. Rheological tests showed that 1‐wt% CNTs formed a network structure. Morphology of residue char indicated that a network enhanced synergistic effect. A synergy between APP and CNTs in blends of PA6/PS (56/24) was also investigated. APP and CNTs exhibited a remarkable synergistic effect at 0.25‐wt% CNTs loading, but the antagonistic effect on flame retardancy of blends was observed at 1‐wt% CNTs loading. Transmission electron microscopy showed that CNTs were exclusively dispersed in the PA6 phase of blends. The selective dispersion of CNTs caused the formation of a network at 0.25‐wt% CNTs loading. Morphology of residue char indicated that 0.25‐wt% CNTs were benefited by the formation of a continuous and well‐swollen residue char that enhanced the synergistic effect in blends. However, the aggregation of 1‐wt% CNTs in PA6 phase caused high viscosity of PA6 phase, resulting in a poor expansion of the residue char. Consequently, the antagonism was exhibited.
Synergistic flame‐retarded effect between carbon nanotubes and ammonium polyphosphate in Nylon6 and Nylon6/polystyrene blends
Fire and Materials
Zhang, Shuai (author) / Lu, Chang (author) / Gao, Xi‐ping (author) / Huang, Xin‐hui (author) / Cao, Cheng‐lin (author) / Yao, Da‐hu (author)
Fire and Materials ; 43 ; 401-412
2019-06-01
Article (Journal)
Electronic Resource
English
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