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首页> 外文期刊>Journal of Applied Polymer Science >Synergistic effect between aluminum hypophosphite and a new intumescent flame retardant system in poly(lactic acid)
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Synergistic effect between aluminum hypophosphite and a new intumescent flame retardant system in poly(lactic acid)

机译：铝次磷酸盐与聚（乳酸）中新型膨胀阻燃系统之间的协同作用

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摘要

A hyperbranched charring agent (CT) was synthesized by triglycidyl isocyanurate and diethylenetriamine in water, and a new intumescent flame retardant (IFR) system was formed by ammonium polyphosphate (APP) and CT. The different formula and synergistic system between IFR and aluminum hypophosphite (AHP) have been studied through limit oxygen index (LOI), UL-94, cone calorimetry test and TGA. It was found that the LOI for poly(lactic acid) (PLA) with 30 APP/CT (4:1) and 20 wt % IFR/AHP (3:1) were 41.2% and 43.5%, respectively, and the both could achieve UL-94V-0 rating with no melt dripping. The heat release rate (HRR), maximum HRR value and average mass loss rate of PLA could be dramatically decreased by combination of IFR and AHP while the thermal stability was greatly enhanced. The study of morphology and structure of char illustrated that more intumescent and compact char layer with good intensity was formed during the degradation of IFR/AHP, which resulting to better flame retardancy and anti-dripping than IFR or AHP alone. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46359.
机译：通过三氯氰酸酯和水中的二亚乙基三胺合成一种超支化的炭状剂（CT），并通过多磷酸铵（APP）和CT形成新的膨胀阻燃剂（IFR）系统。通过限制氧指数（LOI），UL-94，锥形量热法试验和TGA研究了IFR和铝磷酸二磷酸酯（AHP）之间的不同配方和协同体系。结果发现，聚（乳酸）（PLA）的LOI分别为30 APP / CT（4：1）和20wt％IFR / AHP（3：1）分别为41.2％和43.5％，两者均可以实现UL-94V-0等级，没有熔体滴水。热释放率（HRR），PLA的最大HRR值和平均质量损失率通过IFR和AHP的组合可以显着降低，而热稳定性大大提高。在IFR / AHP的降解期间形成了CHAR形态和结构的研究，其中形成了IFR / AHP的降解期间具有良好强度的膨胀性炭块，这导致单独的IFR或AHP更好地阻燃和抗滴。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,46359。

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