Bis(1-methoxy-2,2,6,6-tetramethylpiperidin-4-yl)sebacate (NORSM) was found to perform an exceptional synergistic effect with tris(2,4,6-tribromophenoxy)-1,3,5-triazine (TTBPC)/Sb₂O₃ in HIPS. The LOI of fire retardant HIPS (FR-HIPS) with 16 wt% of TTBPC/Sb₂O₃ increased from 23.8% to 25.2%, the flame retardant rating of FR-HIPS was improved from UL 94 V-2 to UL 94 V-0, and various heat release parameters such as peak heat release rate, total heat release, and mean effective heat of combustion were greatly lowered by combining NORSM of 0.50 wt%. The Py-GC/MS results revealed that NORSM induced the role of synergistic effect; the main mechanisms were as follows: the active radicals such as methoxy radicals and aminyl radicals produced by the pyrolysis of NORSM promote the release of bromine radicals from TTBPC and the formation of HBr and CO₂, which improves the flame retardancy of TTBPC/Sb₂O₃; the above active radicals, together with HBr, quench active free radicals, such as the hydroxyl radical (OH), and decompose the free radical source, which interrupts the chain reaction during combustion and results in a more efficient flame retardant effect in gaseous phase.

中文翻译：

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HIPS中双（1-甲氧基-2,2,6,6-四甲基哌啶-4-基）癸二酸酯和三（2,4,6-三溴苯氧基）-1,3,5-三嗪/ Sb2O3的协同阻燃性

发现癸二酸双（1-甲氧基-2,2,6,6-四甲基哌啶-4-基）（NORSM）与tris（2,4,6-tribromophenoxy）-1,3,5-表现出特殊的协同作用HIPS中的三嗪（TTBPC）/ Sb ₂ O ₃。具有16 wt％的TTBPC / Sb ₂ O _3的阻燃HIPS（FR-HIPS）的LOI从23.8％提高到25.2％，FR-HIPS的阻燃等级从UL 94 V-2提高到UL 94 V-0，并且各种放热参数如峰值放热率，总放热和平均有效通过组合0.50wt％的NORSM，燃烧热大大降低。Py-GC / MS结果表明，NORSM具有协同作用。其主要机理如下：NORSM热解产生的活性自由基，如甲氧基，氨基自由基等，促进了TBTPC中溴自由基的释放以及HBr和CO ₂的形成，提高了TTBPC / Sb ₂的阻燃性。Ø ₃; 上述活性自由基与HBr一起淬灭了活性自由基，例如羟基自由基（OH），并分解了自由基源，从而中断了燃烧过程中的链反应，并在气相中产生了更有效的阻燃效果。