A Green P–N–Al Synergistic System for Eco-Friendly Flame-Retardant Polystyrene.
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| Title: | A Green P–N–Al Synergistic System for Eco-Friendly Flame-Retardant Polystyrene. |
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| Authors: | Li, Zhunzhun1,2 (AUTHOR), Zhang, Qimei2 (AUTHOR), Cui, Jian1 (AUTHOR) jiancui@qust.edu.cn, Yan, Yehai1,2 (AUTHOR) yhyan@qust.edu.cn |
| Source: | Materials (1996-1944). Mar2026, Vol. 19 Issue 5, p941. 18p. |
| Subjects: | Polystyrene, Fireproofing agents, Mechanical behavior of materials, Fire prevention, Hazardous substances |
| Abstract: | Highlights: What are the main findings? Developed a green flame-retardant strategy using bio-based PA and halogen-free components for PS Achieved 28.5% LOI, UL-94 V-0, 73.8% pHRR reduction, and 78.4% tensile strength retention Revealed cooperative condensed- and gas-phase flame-retardant mechanisms via in situ P-N-Al network What are the implications of the main findings? Offers an eco-friendly strategy for high-performance flame-retardant PS materials Provides a new approach to overcome the flame-retardancy/mechanics trade-off in polymers Demonstrates a design strategy for multifunctional composites with balanced safety and performance Polystyrene (PS) is widely used yet highly flammable, and developing halogen-free flame retardants that ensure both high fire safety and mechanical performance remains a challenge. A green intumescent system comprising ammonium dihydrogen phosphate (ADP) and phytic acid–triethylenetetramine (PA–TETA) was incorporated into PS powder via sequential solution grinding and hot pressing. The optimal formulation, PS/10ADP/15PA–TETA, achieved a limiting oxygen index of 28.5% with a UL-94 V-0 rating, and reduced the peak heat release rate and total heat release by 73.8% and 46.2%, respectively, while retaining 78.4% of the tensile strength of neat PS. The ADP/PA–TETA system operates via a cooperative condensed-phase charring and gas-phase dilution mechanism, achieving superior flame retardancy in PS composites. This work provides an effective and eco-friendly strategy for fabricating high-performance PS composites with balanced flame retardancy and mechanical properties. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | Highlights: What are the main findings? Developed a green flame-retardant strategy using bio-based PA and halogen-free components for PS Achieved 28.5% LOI, UL-94 V-0, 73.8% pHRR reduction, and 78.4% tensile strength retention Revealed cooperative condensed- and gas-phase flame-retardant mechanisms via in situ P-N-Al network What are the implications of the main findings? Offers an eco-friendly strategy for high-performance flame-retardant PS materials Provides a new approach to overcome the flame-retardancy/mechanics trade-off in polymers Demonstrates a design strategy for multifunctional composites with balanced safety and performance Polystyrene (PS) is widely used yet highly flammable, and developing halogen-free flame retardants that ensure both high fire safety and mechanical performance remains a challenge. A green intumescent system comprising ammonium dihydrogen phosphate (ADP) and phytic acid–triethylenetetramine (PA–TETA) was incorporated into PS powder via sequential solution grinding and hot pressing. The optimal formulation, PS/10ADP/15PA–TETA, achieved a limiting oxygen index of 28.5% with a UL-94 V-0 rating, and reduced the peak heat release rate and total heat release by 73.8% and 46.2%, respectively, while retaining 78.4% of the tensile strength of neat PS. The ADP/PA–TETA system operates via a cooperative condensed-phase charring and gas-phase dilution mechanism, achieving superior flame retardancy in PS composites. This work provides an effective and eco-friendly strategy for fabricating high-performance PS composites with balanced flame retardancy and mechanical properties. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 19961944 |
| DOI: | 10.3390/ma19050941 |
