The fire-retardant synergy of bis(1-methoxy-2,2,6,6-tetramethyl-4-piperidinyl)sebacate (NORSM) and melamine hydrobromide (MHB)/aluminum diethylphosphinate (ADEP) in polypropylene (PP) has been studied using UL-94 tests, limiting oxygen index (LOI) determination, and cone calorimetry tests (CCTs). The results indicate that NORSM exhibits exceptional fire-retardant synergy with ADEP/MHB in PP. For a PP composite with 1.0 wt% of MHB and 1.5 wt% of ADEP, the LOI increased from 19.0% to 26.0%, fire retardation effectivity increased from 0.48 to 2.93, synergy effectivity was as high as 1.99, UL-94 level was enhanced from none to V-2, fire performance index increased from 56.4 to 84.8, and various heat release values decreased significantly when the PP composite just discussed combining 0.30 wt% of NORSM. NORSM plays a role in synergy with ADEP/MHB primarily through the following modes: radicals such as CH₃O· and aminyl formed by the decomposition of NORSM; PO₂·, PO·, and HPO· formed from ADEP; HBr formed from MHB; and quench active radicals such as HO· for combustion and breaking down the radical source, which terminates the chain oxidation reaction for combustion, leading to more exceptional fire retardation in the gaseous phase.

中文翻译：

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双(1-甲氧基-2,2,6,6-四甲基-4-哌啶基)癸二酸酯与三聚氰胺氢溴酸盐/二乙基亚膦酸铝在聚丙烯中的阻燃协同作用

研究了双（1-甲氧基-2,2,6,6-四甲基-4-哌啶基）癸二酸酯（NORSM）和三聚氰胺氢溴酸盐（MHB）/二乙基次膦酸铝（ADEP）在聚丙烯（PP）中的阻燃协同作用使用 UL-94 测试、极限氧指数 (LOI) 测定和锥形量热测试 (CCT)。结果表明，NORSM 与 PP 中的 ADEP/MHB 具有出色的阻燃协同作用。对于MHB 1.0 wt%和ADEP 1.5 wt%的PP复合材料，LOI从19.0%提高到26.0%，阻燃效率从0.48提高到2.93，协同效率高达1.99，提高了UL-94等级从无到V-2，防火性能指数从56.4提高到84.8，当刚刚讨论的PP复合材料加入0.30wt%的NORSM时，各种放热值显着下降。₃ O·与NORSM分解生成的胺基；PO ₂ ·、PO·和HPO·由ADEP形成；HBr由MHB形成；并淬灭活性自由基如HO·进行燃烧并分解自由基源，从而终止燃烧的链式氧化反应，从而在气相中产生更出色的阻燃性。