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Fire‐retardant synergy of tris(1‐methoxy‐2,2,6,6‐tetramethyl‐4‐piperidinyl)phosphite and aluminum hypophosphite/melamine hydrobromide in polypropylene
Journal of Vinyl and Additive Technology ( IF 3.8 ) Pub Date : 2020-07-24 , DOI: 10.1002/vnl.21788 Junhong Liu 1 , Hongzhi Wu 1 , Mingmei Sun 1 , Shuqian Su 1 , Bo Yan 1 , Linsheng Tang 1
Journal of Vinyl and Additive Technology ( IF 3.8 ) Pub Date : 2020-07-24 , DOI: 10.1002/vnl.21788 Junhong Liu 1 , Hongzhi Wu 1 , Mingmei Sun 1 , Shuqian Su 1 , Bo Yan 1 , Linsheng Tang 1
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Fire‐retardant synergy of tris(1‐methoxy‐2,2,6,6‐tetramethyl‐4‐piperidinyl) phosphite (NORPM) and aluminum hypophosphite (ALHP)/melamine hydrobromide (MHB) in polypropylene (PP) was researched by limiting oxygen index (LOI) measurement, vertical burning test, and cone calorimetric test (CCT). The results reveal that NORPM, together with ALHP/MHB, has an exceptional fire‐retardant synergy in PP. For the FR‐PP containing 1.0 wt% of ALHP and 1.5 wt% of MHB, combining NORPM in 0.20 wt% concentration can make its LOI value increases from 19.0% to 26.1%, the fire‐retardant efficiency (EFF) increases from 0.48 to 3.07, synergistic efficiency (SE) is as high as 2.18, the vertical combustion rating can be improved from none to UL 94 V‐2, fire performance index (FPI) increases from 58.7 to 84.9, and various heat release parameter values are reduced markedly. NORPM induces the synergy with ALHP/MHB primarily by the mechanisms as follows: active free radicals formed through the decomposition of NORPM, such as CH3, CH3O, nitro radicals and amino radicals, together with PH3 and HBr, trap active radicals (HO·) for combustion. Consequently, the reaction chain of combustion is terminated, which makes gaseous phase fire retardancy more efficient.
中文翻译：
聚丙烯中的三（1-甲氧基-2,2,6,6-四甲基-4-哌啶基）亚磷酸酯和次磷酸铝/三聚氰胺氢溴酸盐的阻燃协同作用
聚丙烯（PP）中三（1-甲氧基-2,2,6,6-四甲基-4-哌啶基）亚磷酸酯（NORPM）和次磷酸铝（ALHP）/三聚氰胺氢溴酸盐（MHB）的阻燃协同作用氧气指数（LOI）测量，垂直燃烧测试和锥形量热测试（CCT）。结果表明，NORPM与ALHP / MHB一起在PP中具有出色的阻燃协同作用。对于含有1.0 wt％ALHP和1.5 wt％MHB的FR-PP，结合NORPM以0.20 wt％的浓度可使LOI值从19.0％增加到26.1％，阻燃效率（EFF）从0.48增加到3.07，协同效率（SE）高达2.18，垂直燃烧额定值可以从无提高到UL 94 V-2，防火性能指数（FPI）从58.7提高到84.9，各种放热参数值显着降低。在图3中，CH 3 O，硝基和氨基与PH 3和HBr一起捕获活性自由基（HO·）以进行燃烧。因此，燃烧的反应链被终止，这使得气相阻燃性更加有效。
更新日期：2020-07-24
中文翻译：
聚丙烯中的三（1-甲氧基-2,2,6,6-四甲基-4-哌啶基）亚磷酸酯和次磷酸铝/三聚氰胺氢溴酸盐的阻燃协同作用
聚丙烯（PP）中三（1-甲氧基-2,2,6,6-四甲基-4-哌啶基）亚磷酸酯（NORPM）和次磷酸铝（ALHP）/三聚氰胺氢溴酸盐（MHB）的阻燃协同作用氧气指数（LOI）测量，垂直燃烧测试和锥形量热测试（CCT）。结果表明，NORPM与ALHP / MHB一起在PP中具有出色的阻燃协同作用。对于含有1.0 wt％ALHP和1.5 wt％MHB的FR-PP，结合NORPM以0.20 wt％的浓度可使LOI值从19.0％增加到26.1％，阻燃效率（EFF）从0.48增加到3.07，协同效率（SE）高达2.18，垂直燃烧额定值可以从无提高到UL 94 V-2，防火性能指数（FPI）从58.7提高到84.9，各种放热参数值显着降低。在图3中，CH 3 O，硝基和氨基与PH 3和HBr一起捕获活性自由基（HO·）以进行燃烧。因此，燃烧的反应链被终止，这使得气相阻燃性更加有效。
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