Flame retardant properties and mechanism of PLA/P-PPD -Ph /ECE conjugated flame retardant composites
In this article, 4, 4'-{1'',4''-phenylene-bis[amido-(10'' ''-oxo-10'''-hydro-9'''-oxa-10'''λ5-phosphafi-10'''-yl)-methyl]}-diphenol (P-PPD-Ph) was synthesized by a two-step synthesis, followed by...
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| Format: | Article |
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Frontiers Media S.A.
2023-03-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fchem.2023.1096526/full |
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| author | Yanyan Tan Daohai Zhang Yu Xue Xiao Zhan Fang Tan Shuhao Qin Shuhao Qin |
| author_facet | Yanyan Tan Daohai Zhang Yu Xue Xiao Zhan Fang Tan Shuhao Qin Shuhao Qin |
| author_sort | Yanyan Tan |
| collection | DOAJ |
| description | In this article, 4, 4'-{1'',4''-phenylene-bis[amido-(10'' ''-oxo-10'''-hydro-9'''-oxa-10'''λ5-phosphafi-10'''-yl)-methyl]}-diphenol (P-PPD-Ph) was synthesized by a two-step synthesis, followed by the addition of various levels of epoxy chain extender (ECE) with 5 wt% of P-PPD-Ph The PLA/P-PPD-Ph/ECE conjugated flame retardant composites were produced by co-extrusion into poly(lactic acid) (PLA). The chemical structure of P-PPD-Ph was characterized by FTIR, 1H NMR and 31P NMR tests, demonstrating the successful synthesis of the phosphorus heterophilic flame retardant P-PPD-Ph. The structural, thermal, flame retardant and mechanical properties of the PLA/P-PPD-Ph/ECE conjugated flame retardant composites were characterised using FTIR, thermogravimetric analysis (TG), vertical combustion testing (UL-94), limiting oxygen index (LOI), cone calorimetry, scanning electron microscopy (SEM), elemental energy spectroscopy (EDS) and mechanical properties testing. The structural, thermal, flame retardant and mechanical properties of PLA/P-PPD-Ph/ECE conjugated flame retardant composites were characterised. The results showed that with the increase of ECE content, the residual carbon rate of the composites increased from 1.6% to 3.3%, and the LOI value increased from 29.8% to 32.6%. The cross-linking reaction between P-PPD-Ph and PLA and the increase of reaction sites led to the generation of more phosphorus-containing radicals on the PLA molecular chain, which strengthened the cohesive phase flame retardant effect of PLA flame retardant composites, and The bending strength, tensile strength and impact strength were all improved. |
| first_indexed | 2024-04-10T00:15:16Z |
| format | Article |
| id | doaj.art-34945b8b73314c489984c4d26743876e |
| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-04-10T00:15:16Z |
| publishDate | 2023-03-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Chemistry |
| spelling | doaj.art-34945b8b73314c489984c4d26743876e2023-03-16T05:16:50ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462023-03-011110.3389/fchem.2023.10965261096526Flame retardant properties and mechanism of PLA/P-PPD -Ph /ECE conjugated flame retardant compositesYanyan Tan0Daohai Zhang1Yu Xue2Xiao Zhan3Fang Tan4Shuhao Qin5Shuhao Qin6School of Chemical Engineering of Guizhou Minzu University, Guiyang, ChinaSchool of Chemical Engineering of Guizhou Minzu University, Guiyang, ChinaNational Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang, ChinaSchool of Chemical Engineering of Guizhou Minzu University, Guiyang, ChinaSchool of Chemical Engineering of Guizhou Minzu University, Guiyang, ChinaSchool of Chemical Engineering of Guizhou Minzu University, Guiyang, ChinaNational Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang, ChinaIn this article, 4, 4'-{1'',4''-phenylene-bis[amido-(10'' ''-oxo-10'''-hydro-9'''-oxa-10'''λ5-phosphafi-10'''-yl)-methyl]}-diphenol (P-PPD-Ph) was synthesized by a two-step synthesis, followed by the addition of various levels of epoxy chain extender (ECE) with 5 wt% of P-PPD-Ph The PLA/P-PPD-Ph/ECE conjugated flame retardant composites were produced by co-extrusion into poly(lactic acid) (PLA). The chemical structure of P-PPD-Ph was characterized by FTIR, 1H NMR and 31P NMR tests, demonstrating the successful synthesis of the phosphorus heterophilic flame retardant P-PPD-Ph. The structural, thermal, flame retardant and mechanical properties of the PLA/P-PPD-Ph/ECE conjugated flame retardant composites were characterised using FTIR, thermogravimetric analysis (TG), vertical combustion testing (UL-94), limiting oxygen index (LOI), cone calorimetry, scanning electron microscopy (SEM), elemental energy spectroscopy (EDS) and mechanical properties testing. The structural, thermal, flame retardant and mechanical properties of PLA/P-PPD-Ph/ECE conjugated flame retardant composites were characterised. The results showed that with the increase of ECE content, the residual carbon rate of the composites increased from 1.6% to 3.3%, and the LOI value increased from 29.8% to 32.6%. The cross-linking reaction between P-PPD-Ph and PLA and the increase of reaction sites led to the generation of more phosphorus-containing radicals on the PLA molecular chain, which strengthened the cohesive phase flame retardant effect of PLA flame retardant composites, and The bending strength, tensile strength and impact strength were all improved.https://www.frontiersin.org/articles/10.3389/fchem.2023.1096526/fullECEP-PPD-Phthermal performanceflame retardancymechanical property |
| spellingShingle | Yanyan Tan Daohai Zhang Yu Xue Xiao Zhan Fang Tan Shuhao Qin Shuhao Qin Flame retardant properties and mechanism of PLA/P-PPD -Ph /ECE conjugated flame retardant composites Frontiers in Chemistry ECE P-PPD-Ph thermal performance flame retardancy mechanical property |
| title | Flame retardant properties and mechanism of PLA/P-PPD -Ph /ECE conjugated flame retardant composites |
| title_full | Flame retardant properties and mechanism of PLA/P-PPD -Ph /ECE conjugated flame retardant composites |
| title_fullStr | Flame retardant properties and mechanism of PLA/P-PPD -Ph /ECE conjugated flame retardant composites |
| title_full_unstemmed | Flame retardant properties and mechanism of PLA/P-PPD -Ph /ECE conjugated flame retardant composites |
| title_short | Flame retardant properties and mechanism of PLA/P-PPD -Ph /ECE conjugated flame retardant composites |
| title_sort | flame retardant properties and mechanism of pla p ppd ph ece conjugated flame retardant composites |
| topic | ECE P-PPD-Ph thermal performance flame retardancy mechanical property |
| url | https://www.frontiersin.org/articles/10.3389/fchem.2023.1096526/full |
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