{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,7]],"date-time":"2026-09-07T14:29:36Z","timestamp":1788791376873,"version":"build-2803163510"},"reference-count":18,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2019,2,21]],"date-time":"2019-02-21T00:00:00Z","timestamp":1550707200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004826","name":"Natural Science Foundation of Beijing Municipality","doi-asserted-by":"publisher","award":["2184136, 3194064, 3194063"],"award-info":[{"award-number":["2184136, 3194064, 3194063"]}],"id":[{"id":"10.13039\/501100004826","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Key Research Program of Frontier Sciences","award":["QYZDB-SSW-JSC050-01"],"award-info":[{"award-number":["QYZDB-SSW-JSC050-01"]}]},{"name":"Prospective Project of Technology and Engineering Center for Space Utilization","award":["CSU-QZKT-201708"],"award-info":[{"award-number":["CSU-QZKT-201708"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>The flame retardant modification of epoxy (EP) is of great signification for aerospace, automotive, marine, and energy industries. In this study, a series of EP composites containing different variations of phosphorus-containing polysulfone (with a phosphorus content of approximately 1.25 wt %) were obtained. The obtained EP\/polysulfone composites had a high glass transition temperature (Tg) and high flame retardancy. The influence of phosphorus-containing compounds (ArPN2, ArPO2, ArOPN2 and ArOPO2) on the thermal properties and flame retardancy of EP\/polysulfone composites was investigated by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), a UL-94 vertical burning test, and cone calorimeter tests. The phosphorus-containing polysulfone enhanced the thermal stability of EP. The more stable porous char layer, less flammable gases, and a lower apparent activation energy at a high degree of conversion demonstrated the high gas inhibition effect of phosphorus-containing compounds. Moreover, the gas inhibition effect of polysulfone with a P\u2013C bond was more efficient than the polysulfone with a P\u2013O\u2013C bond. The potential for optimizing flame retardancy while maintaining a high Tg is highlighted in this study. The flame-retardant EP\/polysulfone composites with high thermal stability broaden the application field of epoxy.<\/jats:p>","DOI":"10.3390\/polym11020380","type":"journal-article","created":{"date-parts":[[2019,2,22]],"date-time":"2019-02-22T03:49:44Z","timestamp":1550807384000},"page":"380","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Investigation of the Structure-Property Effect of Phosphorus-Containing Polysulfone on Decomposition and Flame Retardant Epoxy Resin Composites"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7298-238X","authenticated-orcid":false,"given":"Wei","family":"Zhao","sequence":"first","affiliation":[{"name":"CAS Key Laboratory of Space Manufacturing Technology, Technology and Engineering Center for Space Utilization, Chinese Academy of Sciences, Beijing 100094, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yongxiang","family":"Li","sequence":"additional","affiliation":[{"name":"CAS Key Laboratory of Space Manufacturing Technology, Technology and Engineering Center for Space Utilization, Chinese Academy of Sciences, Beijing 100094, China"},{"name":"University of Chinese Academy of Sciences, Beijing 100049, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qiushi","family":"Li","sequence":"additional","affiliation":[{"name":"CAS Key Laboratory of Space Manufacturing Technology, Technology and Engineering Center for Space Utilization, Chinese Academy of Sciences, Beijing 100094, China"},{"name":"University of Chinese Academy of Sciences, Beijing 100049, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yiliang","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Center for Nano and Micro Mechanics, Tsinghua University, Beijing 100084, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gong","family":"Wang","sequence":"additional","affiliation":[{"name":"CAS Key Laboratory of Space Manufacturing Technology, Technology and Engineering Center for Space Utilization, Chinese Academy of Sciences, Beijing 100094, China"},{"name":"University of Chinese Academy of Sciences, Beijing 100049, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2019,2,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Pom\u00e1zi, \u00c1., and Toldy, A. (2017). Particle distribution of solid flame retardants in infusion moulded composites. Polymers, 9.","DOI":"10.3390\/polym9070250"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"74","DOI":"10.1016\/j.compositesb.2018.05.018","article-title":"Influence of phenylphosphonic amide on rheological, mechanical and flammable properties of carbon fiber\/RTM6 composites","volume":"149","author":"Zhao","year":"2017","journal-title":"Compos. Part B"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"4710","DOI":"10.3390\/ma3104710","article-title":"Phosphorus-based flame retardancy mechanisms-old hat or a starting point for future development?","volume":"3","author":"Schartel","year":"2010","journal-title":"Materials"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Pom\u00e1zi, \u00c1., Szolnoki, B., and Toldy, A. (2018). Flame retardancy of low-viscosity epoxy resins and their carbon fibre reinforced composites via a combined solid and gas phase mechanism. Polymers, 10.","DOI":"10.3390\/polym10101081"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"8495","DOI":"10.1016\/j.polymer.2006.10.022","article-title":"Influence of the oxidation state of phosphorus on the decomposition and fire behaviour of flame-retarded epoxy resin composites","volume":"47","author":"Braun","year":"2006","journal-title":"Polymer"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"504","DOI":"10.3390\/polym7030504","article-title":"An overview of mode of action and analytical methods for evaluation of gas phase activities of flame retardants","volume":"7","author":"Salmeia","year":"2015","journal-title":"Polymers"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"7042","DOI":"10.1039\/C4PY00830H","article-title":"Hyperbranched poly(phosphoester)s as flame retardants for technical and high performance polymers","volume":"5","author":"Marsico","year":"2014","journal-title":"Polym. Chem."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"80415","DOI":"10.1039\/C5RA06762F","article-title":"Simple green synthesis of solid polymeric bisphenol A bis(diphenyl phosphate) and its flame retardancy in epoxy resins","volume":"5","author":"Zhao","year":"2015","journal-title":"RSC Adv."},{"key":"ref_9","first-page":"53","article-title":"Synthesis and characterization of polysulfonyl diphenylene phenyl phosphonate","volume":"15","author":"Wang","year":"1999","journal-title":"Polym. Mat. Sci. Eng."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"49863","DOI":"10.1039\/C7RA08318A","article-title":"Synthesis, structure\u2013property and flame retardancy relationships of polyphosphonamide and its application on epoxy resins","volume":"7","author":"Zhao","year":"2017","journal-title":"RSC Adv."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"78","DOI":"10.1016\/j.jhazmat.2018.11.093","article-title":"Synthesis of a novel phosphazene-based flame retardant with active amine groups and its application in reducing the fire hazard of epoxy resin","volume":"366","author":"Yang","year":"2019","journal-title":"J. Hazard. Mater."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"778","DOI":"10.1016\/j.polymer.2006.12.011","article-title":"Novel phosphorus-modified polysulfone as a combined flame retardant and toughness modifier for epoxy resins","volume":"48","author":"Perez","year":"2007","journal-title":"Polymer"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"6936","DOI":"10.1016\/j.polymer.2013.10.054","article-title":"Side-chain phenol-functionalized poly(ether sulfone) and its contribution to high-performance and flexible epoxy thermosets","volume":"54","author":"Lin","year":"2013","journal-title":"Polymer"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"1336","DOI":"10.1016\/0032-3861(93)90798-F","article-title":"Synthesis of aromatic polyphosphonate: low temperature solution polycondensation of 4,4\u2032-sulphonyldiphenol with phenoxy dichlorophosphate","volume":"34","author":"Liaw","year":"1993","journal-title":"Polymer"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"6621","DOI":"10.1039\/c0jm03959d","article-title":"Synthesis, structure-property relationships of polyphosphoramides with high char residues","volume":"21","author":"Tai","year":"2011","journal-title":"J. Mater. Chem. A."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"120","DOI":"10.1016\/j.polymdegradstab.2015.04.023","article-title":"Synthesis of a novel PEPA-substituted polyphosphoramide with high char residues and its performance as an intumescent flame retardant for epoxy resins","volume":"118","author":"Zhao","year":"2015","journal-title":"Polym. Degrad. Stab."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"395","DOI":"10.1016\/j.polymdegradstab.2014.10.009","article-title":"Catalytic pyrolysis and flame retardancy of epoxy resins with solid acid boron phosphate","volume":"110","author":"Zhou","year":"2014","journal-title":"Polym. Degrad. Stab."},{"key":"ref_18","first-page":"10905","article-title":"Synergistic effect between a novel char forming agent and ammonium polyphosphate on flame retardancy and thermal properties of polypropylene","volume":"52","author":"Tian","year":"2013","journal-title":"RSC Adv."}],"container-title":["Polymers"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2073-4360\/11\/2\/380\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T12:33:43Z","timestamp":1760186023000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2073-4360\/11\/2\/380"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,2,21]]},"references-count":18,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2019,2]]}},"alternative-id":["polym11020380"],"URL":"https:\/\/doi.org\/10.3390\/polym11020380","relation":{},"ISSN":["2073-4360"],"issn-type":[{"value":"2073-4360","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,2,21]]}}}