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Function of the aryl group in bis DOPO phosphonate on reducing fire hazards of polyamide 6 composites
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-03-09 , DOI: 10.1002/app.49188
Lijuan Long 1 , Wang Zhou 1 , Yushu Xiang 1 , Juan Li 1 , Shaowen Huang 1 , Shuhao Qin 1 , Guomin Xu 1 , Jie Yu 1
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-03-09 , DOI: 10.1002/app.49188
Lijuan Long 1 , Wang Zhou 1 , Yushu Xiang 1 , Juan Li 1 , Shaowen Huang 1 , Shuhao Qin 1 , Guomin Xu 1 , Jie Yu 1
Affiliation
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The increased integration interaction of bis 9,10‐dihydro‐9‐oxa‐ 10‐phospaphenanthrene‐10‐oxide (DOPO) phosphonate (abbreviated as FR) including ethyl‐(FR1), phenethyl‐(FR2), naphthalene‐(FR3) with the aryl group and hexa‐phenoxy‐cyclotriphosphazene (HPCP) on flame‐retardant polyamide 6 (PA6) were investigated. The role of the aryl group in FR on flame‐retarding PA6 was analyzed. Results showed that PA6 composites with greatly reduced fire hazards possessed a high‐limiting oxygen index value of 34% and achieved a UL‐94 V‐0 rating and sharply decreased peak heat release rate by simultaneously adding FR and HPCP. Flame inhibition effect acted as the main mechanism for FR and HPCP in flame‐retarding PA6. Gas phase action increased with the number of aryl groups. HPCP played a catalytic effect in the condensed phase. Particularly, the result of residue analysis after cone test implied that char surface with network structure was formed, and the structure became compact and continuous with the increase in the number of aryl groups. Furthermore, the aryl group played an important role in aiding the PA6 composites in the construction of a network protective char layer on the surface during combustion.
中文翻译：
双DOPO膦酸酯中的芳基对降低聚酰胺6复合材料着火危险的作用
bis 9,10-dihydro-9-oxa-10-phospaphenanthrene-10-oxide（DOPO）膦酸酯（缩写为FR）的整合相互作用增强，包括乙基（FR1），苯乙基（FR2），萘（FR3）研究了在芳族聚酰胺6（PA6）上带有芳基和六苯氧基环三磷腈（HPCP）的化合物。分析了芳基在阻燃PA6阻燃剂中的作用。结果表明，具有极大降低的火灾隐患的PA6复合材料具有34％的高极限氧指数值，并且通过同时添加FR和HPCP达到UL-94 V-0等级，并且峰值放热速率急剧降低。阻燃作用是阻燃PA6中FR和HPCP的主要机理。气相作用随着芳基数目的增加而增加。HPCP在缩合阶段起催化作用。尤其，锥形试验后的残留分析结果表明，形成了具有网状结构的炭表面，并且随着芳基数量的增加，结构变得紧密连续。此外，芳基在助燃过程中在表面上形成网络保护炭层的过程中，在辅助PA6复合材料方面起着重要作用。
更新日期：2020-03-09
中文翻译：
双DOPO膦酸酯中的芳基对降低聚酰胺6复合材料着火危险的作用
bis 9,10-dihydro-9-oxa-10-phospaphenanthrene-10-oxide（DOPO）膦酸酯（缩写为FR）的整合相互作用增强，包括乙基（FR1），苯乙基（FR2），萘（FR3）研究了在芳族聚酰胺6（PA6）上带有芳基和六苯氧基环三磷腈（HPCP）的化合物。分析了芳基在阻燃PA6阻燃剂中的作用。结果表明，具有极大降低的火灾隐患的PA6复合材料具有34％的高极限氧指数值，并且通过同时添加FR和HPCP达到UL-94 V-0等级，并且峰值放热速率急剧降低。阻燃作用是阻燃PA6中FR和HPCP的主要机理。气相作用随着芳基数目的增加而增加。HPCP在缩合阶段起催化作用。尤其，锥形试验后的残留分析结果表明，形成了具有网状结构的炭表面，并且随着芳基数量的增加，结构变得紧密连续。此外，芳基在助燃过程中在表面上形成网络保护炭层的过程中，在辅助PA6复合材料方面起着重要作用。
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