Terminal group effects of DOPO-conjugated flame retardant on polyamide 6: Thermal stability, flame retardancy and mechanical performances
Two DOPO-conjugated flame retardants with or without amino terminal groups (DOPO-NH2 and DIDOPO, respectively) were synthesized and incorporated into polyamide 6 (PA6). Results demonstrated the DOPO-NH2 endowed superior thermal, flame retardant and mechanical performances to PA6 composites. With the...
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| Format: | Article |
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Frontiers Media S.A.
2022-09-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fchem.2022.1002569/full |
| _version_ | 1818032791422500864 |
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| author | Jing Gao Wentao He Yushu Xiang Lijuan Long Shuhao Qin |
| author_facet | Jing Gao Wentao He Yushu Xiang Lijuan Long Shuhao Qin |
| author_sort | Jing Gao |
| collection | DOAJ |
| description | Two DOPO-conjugated flame retardants with or without amino terminal groups (DOPO-NH2 and DIDOPO, respectively) were synthesized and incorporated into polyamide 6 (PA6). Results demonstrated the DOPO-NH2 endowed superior thermal, flame retardant and mechanical performances to PA6 composites. With the same loading of 15 wt%, DOPO-NH2 can catalyze the PA6 matrix more effectively and result in more residues at high temperature. The PA6 composites containing DOPO-NH2 exhibited higher LOI (28.0%) compared to 25.0% for the sample containing DIDOPO, and the lower heat release capacity and peak heat release rate. Furthermore, the overall mechanical properties of PA6 composites containing DOPO-NH2 outperformed the samples containing DIDOPO, even superior to that for PA6. Such a significant difference can be mainly attributed to the existence of amino-terminal group, which can interact with carboxyl group in PA6 as confirmed by dynamic mechanical analysis, improving the compatibility between the flame retardant and PA6 matrix. |
| first_indexed | 2024-12-10T06:12:59Z |
| format | Article |
| id | doaj.art-e41de335ad4947b7a8ff604347e66f37 |
| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-12-10T06:12:59Z |
| publishDate | 2022-09-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Chemistry |
| spelling | doaj.art-e41de335ad4947b7a8ff604347e66f372022-12-22T01:59:31ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462022-09-011010.3389/fchem.2022.10025691002569Terminal group effects of DOPO-conjugated flame retardant on polyamide 6: Thermal stability, flame retardancy and mechanical performancesJing Gao0Wentao He1Yushu Xiang2Lijuan Long3Shuhao Qin4Hubei Key Laboratory for Processing and Application of Catalytic Materials, Huanggang Normal University, Huangzhou, ChinaHubei Key Laboratory for Processing and Application of Catalytic Materials, Huanggang Normal University, Huangzhou, ChinaNational Engineering Research Center for Compounding and Modification of Polymer Materials, Guizhou, ChinaNational Engineering Research Center for Compounding and Modification of Polymer Materials, Guizhou, ChinaNational Engineering Research Center for Compounding and Modification of Polymer Materials, Guizhou, ChinaTwo DOPO-conjugated flame retardants with or without amino terminal groups (DOPO-NH2 and DIDOPO, respectively) were synthesized and incorporated into polyamide 6 (PA6). Results demonstrated the DOPO-NH2 endowed superior thermal, flame retardant and mechanical performances to PA6 composites. With the same loading of 15 wt%, DOPO-NH2 can catalyze the PA6 matrix more effectively and result in more residues at high temperature. The PA6 composites containing DOPO-NH2 exhibited higher LOI (28.0%) compared to 25.0% for the sample containing DIDOPO, and the lower heat release capacity and peak heat release rate. Furthermore, the overall mechanical properties of PA6 composites containing DOPO-NH2 outperformed the samples containing DIDOPO, even superior to that for PA6. Such a significant difference can be mainly attributed to the existence of amino-terminal group, which can interact with carboxyl group in PA6 as confirmed by dynamic mechanical analysis, improving the compatibility between the flame retardant and PA6 matrix.https://www.frontiersin.org/articles/10.3389/fchem.2022.1002569/fullterminal group effectconjugated flame retardantpolyamide 6flame retardancymechanical performance |
| spellingShingle | Jing Gao Wentao He Yushu Xiang Lijuan Long Shuhao Qin Terminal group effects of DOPO-conjugated flame retardant on polyamide 6: Thermal stability, flame retardancy and mechanical performances Frontiers in Chemistry terminal group effect conjugated flame retardant polyamide 6 flame retardancy mechanical performance |
| title | Terminal group effects of DOPO-conjugated flame retardant on polyamide 6: Thermal stability, flame retardancy and mechanical performances |
| title_full | Terminal group effects of DOPO-conjugated flame retardant on polyamide 6: Thermal stability, flame retardancy and mechanical performances |
| title_fullStr | Terminal group effects of DOPO-conjugated flame retardant on polyamide 6: Thermal stability, flame retardancy and mechanical performances |
| title_full_unstemmed | Terminal group effects of DOPO-conjugated flame retardant on polyamide 6: Thermal stability, flame retardancy and mechanical performances |
| title_short | Terminal group effects of DOPO-conjugated flame retardant on polyamide 6: Thermal stability, flame retardancy and mechanical performances |
| title_sort | terminal group effects of dopo conjugated flame retardant on polyamide 6 thermal stability flame retardancy and mechanical performances |
| topic | terminal group effect conjugated flame retardant polyamide 6 flame retardancy mechanical performance |
| url | https://www.frontiersin.org/articles/10.3389/fchem.2022.1002569/full |
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