Aluminum Hypophosphite versus Alkyl-Substituted Phosphinate in Polyamide 6: Flame Retardance, Thermal Degradation, and Pyrolysis Behavior
Aluminum Hypophosphite versus Alkyl-Substituted Phosphinate in Polyamide 6: Flame Retardance, Thermal Degradation, and Pyrolysis Behavior
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聚酰胺 6 中的次磷酸铝与烷基取代的次膦酸盐：阻燃性、热降解和热解行为
DOI：
10.1021/ie303446s
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发表时间：
2013-02-27
影响因子：
4.2
通讯作者：
Wang, Yu-Zhong
中科院分区：
文献类型：
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作者：
Zhao, Bin;Chen, Li;Wang, Yu-Zhong
次磷酸铝 (AP) 和异丁基次膦酸铝 (APBu) 用于阻燃聚酰胺 6 (PA6)。添加 AP 或 APBu 会导致 LOI 值增加、UL-94 V-0 等级增加，并在锥体量热测试中减少放热。然而，两种阻燃剂的不同化学结构导致了不同的阻燃效果：APBu赋予PA6比AP更高的LOI值和更好的UL-94结果。使用残留物的 TGA、TG-IR、Py-GC/MS 和 FTIR 表征研究了 AP、APBu 和相应复合材料的分解途径。 AP的引入由于发生交联反应而改变了复合材料的热稳定性和分解行为，流变分析和TG-DSC证明了这一点。 APBu对热解产物的组成和分解行为没有本质影响，但主要在气相中产生含磷自由基清除剂，对阻燃有积极作用。菲娜...
Aluminum hypophosphite (AP) and aluminum isobutylphosphinate (APBu) were used to flame retard polyamide 6 (PA6). Addition of either AP or APBu resulted in an increased LOI value, UL-94 V-0 rating, and decreased heat release in cone calorimetric tests. However, different chemical structures of two flame retardants caused different flame-retardant effects: APBu endowed PA6 a higher LOI value and better UL-94 result than did AP. Decomposition pathways of AP, APBu, and the corresponding composites were investigated using TGA, TG-IR, Py-GC/MS, and FTIR characterization of the residues. The introduction of AP changed the thermal stability and decomposition behavior of the composites due to the cross-linking reactions occurred, which were proved by rheological analysis and TG-DSC. APBu could not essentially affect the composition of pyrolysis products and decomposition behaviors, but mainly produced phosphorus-containing free radical scavengers in the gaseous phase, which were positive to flame retardation. Fina...