Synthesis of new DOPO derivatives and investigation of their synergistic effect with APP-PEI on the flame retardancy of epoxy composite

Epoxy resin has been extensively used in many industrial and daily applications due to its unique properties. However, the high flammability of epoxy has limited its further development. DOPO derivatives, which are organophosphorus compounds, are highly effective components of flame retardant epoxy...

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Bibliographic Details
Published in:RSC advances 2024-02, Vol.14 (8), p.5264-5275
Main Authors: Duc, Cong Trinh, Nguyen, Linh Chi, Van, Phuc Ban, Nguyen, Ha Thanh, Dang Thi, Tuyet Anh, Le-Nhat-Thuy, Giang, Nguyen Thi, Quynh Giang, Thi, Phuong Hoang, Nguyen, Tuan Anh, Tran, Quang Vinh, Quang, Hung Tran, Hoang, Mai Ha, Van, Tuyen Nguyen
Format: Article
Language:English
Subjects:
Biocompatibility
Composite materials
Epoxy resins
Flame retardants
Flammability
Impact strength
Mechanical properties
NMR spectroscopy
Organophosphorus compounds
Polyetherimides
Polyethyleneimine
Synergistic effect
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Summary:Epoxy resin has been extensively used in many industrial and daily applications due to its unique properties. However, the high flammability of epoxy has limited its further development. DOPO derivatives, which are organophosphorus compounds, are highly effective components of flame retardant epoxy composites due to their good compatibility with the resin and their lower toxicity compared to halogenated compounds. This study synthesized sixteen new DOPO derivatives, characterizing their chemical structures with NMR spectroscopy. The combination of synthesized DOPO derivatives and APP-PEI (ammonium polyphosphate-polyethyleneimine) has shown a synergistic effect on enhancing the flame retardancy of epoxy resin with the UL-94 V-0 rating and the LOI value of 28.6%. Moreover, the epoxy composites displayed relatively high mechanical performance with the impact strength of 26-28 kJ m −2 . Sixteen DOPO derivatives FR1-FR16 were successfully synthesized. The DOPO derivatives and APP-PEI showed a synergistic effect on the flame retardancy of epoxy. The epoxy composites displayed high fire resistance and good mechanical property.
ISSN:2046-2069
2046-2069
DOI:10.1039/d4ra00051j