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Zhang A, Wang W, Dong Z, Wei J, Wei L, Gu W, Zheng G, Wang R. Mechanical, Thermal Stability, and Flame Retarding Properties of Phosphorus-Modified PET Blended with DOPO-POSS. ACS OMEGA 2022; 7:46277-46287. [PMID: 36570273 PMCID: PMC9773934 DOI: 10.1021/acsomega.2c04628] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 10/20/2022] [Indexed: 06/17/2023]
Abstract
In this study, an antidroplet flame retardant system based on FRPET (phosphorus-containing copolyester) is constructed with DOPO-POSS (polyhedral oligomeric silsesquioxane containing DOPO) as an additive flame retardant. It is demonstrated that DOPO-POSS has good dispersibility at a lower amount. When the amount of DOPO-POSS is 9 wt %, the residual char of DOPO-POSS/FRPET at 700 °C increases to 23.56 from 18.16% of FRPET, and the maximum thermal weight loss rate also reduces. What is more is that the limiting oxygen index increases to 33 from 26% of FRPET. The flame burning time is shortened to 4.95 from 20.8 s, the phenomenon of self-extinguishing of the fire occurs, and the vertical combustion level is increased from V-2 to V-0. Compared with FRPET, the peak of the heat release rate decreases by 66.0%, the total heat release decreases by 32.4%, the flame retardancy index (FRI) reaches an excellent value, and the condensed-phase products significantly improve. The Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy-energy dispersive X-ray spectrometry (SEM-EDX), thermogravimetric-FTIR (TG-FTIR), and pyrolysis-gas chromatograph/mass spectrometry (Py-GC/MS) results indicate that DOPO-POSS contributes to the formation of char layers and decomposes to generate free radicals with a quenching effect. In a word, DOPO-POSS is an effective radical trapper and charring agent for PET and exerts a flame retardancy effect in gaseous and condensed phases simultaneously.
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Affiliation(s)
- Anying Zhang
- School
of Material Science and Engineering, Tiangong
University, No. 399 BinShuiXi Road, Xiqing District, Tianjin 300387, China
- School
of Materials Design and Engineering, Beijing
Institute of Fashion Technology, No. A2, East Yinghua Street, Chaoyang
District, Beijing 100029, China
| | - Wenhui Wang
- School
of Materials Design and Engineering, Beijing
Institute of Fashion Technology, No. A2, East Yinghua Street, Chaoyang
District, Beijing 100029, China
| | - Zhenfeng Dong
- School
of Materials Design and Engineering, Beijing
Institute of Fashion Technology, No. A2, East Yinghua Street, Chaoyang
District, Beijing 100029, China
| | - Jianfei Wei
- School
of Materials Design and Engineering, Beijing
Institute of Fashion Technology, No. A2, East Yinghua Street, Chaoyang
District, Beijing 100029, China
| | - Lifei Wei
- Shanghai
Different Advanced Material Company Limited, No.58 Jian a Road, Xingta Industrial Zone, Fengjing, Jinshan District, Shanghai 201502, China
| | - Weiwen Gu
- School
of Materials Design and Engineering, Beijing
Institute of Fashion Technology, No. A2, East Yinghua Street, Chaoyang
District, Beijing 100029, China
| | - Guo Zheng
- School
of Material Science and Engineering, Tiangong
University, No. 399 BinShuiXi Road, Xiqing District, Tianjin 300387, China
| | - Rui Wang
- School
of Materials Design and Engineering, Beijing
Institute of Fashion Technology, No. A2, East Yinghua Street, Chaoyang
District, Beijing 100029, China
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A phosphaphenanthrene-based derivative as multifunctional flame retardant for epoxy resins. REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2022.105375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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