A synthesized P/N/S oligomer flame retardant to construct superior flame-retardant, transparent, and mechanical properties epoxy resin
Article
Zhou, Jing, Guo, Yong, Chen, Zhongwei, Chen, Tingting, Yu, Yuan, Zhang, Qingwu and Jiang, Juncheng. 2024. "A synthesized P/N/S oligomer flame retardant to construct superior flame-retardant, transparent, and mechanical properties epoxy resin
." Materials Today Chemistry. 40. https://doi.org/10.1016/j.mtchem.2024.102201
| Article Title | A synthesized P/N/S oligomer flame retardant to construct superior flame-retardant, transparent, and mechanical properties epoxy resin |
|---|---|
| ERA Journal ID | 211077 |
| Article Category | Article |
| Authors | Zhou, Jing, Guo, Yong, Chen, Zhongwei, Chen, Tingting, Yu, Yuan, Zhang, Qingwu and Jiang, Juncheng |
| Journal Title | Materials Today Chemistry |
| Journal Citation | 40 |
| Article Number | 102201 |
| Number of Pages | 10 |
| Year | 2024 |
| Publisher | Elsevier |
| Place of Publication | United Kingdom |
| ISSN | 2468-5194 |
| Digital Object Identifier (DOI) | https://doi.org/10.1016/j.mtchem.2024.102201 |
| Web Address (URL) | https://www.sciencedirect.com/science/article/abs/pii/S2468519424003070 |
| Abstract | The construction of epoxy resin (EP) composites with remarkable flame retardancy, transparency, and mechanical properties was a challenging subject in the industry. A novel P/N/S oligomer flame retardant (PALO) was synthesized of terephthalaldehyde (TPAL), 4-aminothiophenol (PATP), and 9, 10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO), and employed in EP to fabricate a series of EP/PALO composites with different PALO amount. Thermogravimetric analysis (TGA) revealed that PALO exhibited remarkable thermal stability, retaining a substantial char residue of 32.2 wt% at 800 °C. Thanks to the synergy of P, N, and S, EP/PALO composites exhibited excellent flame retardancy properties. The LOI value of the EP/PALO composites saw a rise from 31.0 % to 34.2 % as the PALO content increased from 2.5 to 10 wt%, while UL-94 remained at the V-0 rating. EP/PALO also showed significant heat suppression and smoke suppression effects. The combined effects of the physical barrier from phosphate-containing char in the condensed phase, along with the flame-retardant and dilution effects of phosphorus radicals, nitrogen, and sulfur inert gases in the gas phase, contributed to the significant enhancement in flame retardancy observed in the EP/PALO composites. A notable increase in the tensile strength, flexural strength, and elongation at break of EP was triggered by the incorporation of 2.5 wt% PALO, with enhancements observed by 18.2 %, 16.6 %, and 53.1 %, respectively. Simultaneously, PALO effectively maintained the favorable transparency of EP composites under different addition amounts. Therefore, this study outlined a holistic approach for the development of oligomer flame retardants containing P/N/S and had good application potential for constructing EP composites with superior flame retardancy, transparency, and mechanical properties under different addition amounts. |
| Keywords | Epoxy resin; Flame retardant; Mechanical properties; Transparency |
| Contains Sensitive Content | Does not contain sensitive content |
| ANZSRC Field of Research 2020 | 3499. Other chemical sciences |
| Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
| Byline Affiliations | Nanjing Tech University, China |
| Centre for Future Materials | |
| School of Surveying and Built Environment |
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