Poly (diallyldimethylammonium chloride) (PDDA) and ammonium polyphosphate (APP) deionized chloride ions and ammonium ions by ionizing in aqueous solution respectively, then combined to form poly (diallyldimethylammonium) and polyphosphate (PAPP) polyelectrolyte complexes as an all‐in‐one flame retardant for polypropylene and its composites were characterized by Fourier transform infrared (FTIR) spectroscopy and X‐ray photoelectron spectroscopy. One flame retardant system composed of PAPP and PP, the other flame retardant system composed of PAPP, Polyamide‐6 (PA6) and PP were tested by limiting oxygen index (LOI), UL‐94, cone calorimeter tests and thermogravimetric analysis (TGA) and compared with pure PP. The results showed that the LOI value of PP/PAPP composite can reach 27.5%, and UL‐94 V‐2 rating can be reached at 25 wt% PAPP loading. Meanwhile the cone calorimetry results displayed that the peak heat release rate (PHRR) and total heat release (THR) were reduced up to 69.3% and 22.5%, respectively, compared with those of pure PP. After adding 5 wt% PA6, the carbon source missing due to the early PAPP decomposition can be made up, and PHRR and THR can be further reduced slightly. The flame retardant mechanism of PAPP was studied by FTIR spectroscopy and X‐ray photoelectron spectroscopy. Six‐membered ring of C─N containing conjugate double bonds, cross‐linked phosphate structure formed stable, intumescent, compact char layer which greatly improved the flame retardancy of PP.

中文翻译：

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聚（二烯丙基二甲基铵）和聚磷酸盐聚电解质配合物，是聚丙烯的多合一阻燃剂

聚（二烯丙基二甲基氯化铵）（PDDA）和聚磷酸铵（APP）分别通过在水溶液中电离而去离子氯离子和铵离子，然后结合形成聚（二烯丙基二甲基铵）和聚磷酸（PAPP）聚电解质复合物，成为多合一火焰聚丙烯及其复合材料的阻燃剂通过傅里叶变换红外（FTIR）光谱和X射线光电子能谱进行表征。一种阻燃系统由PAPP和PP组成，另一种阻燃系统由PAPP，聚酰胺6（PA6）和PP组成，通过极限氧指数（LOI），UL‐94，锥形量热仪测试和热重分析（TGA）进行了测试并与纯PP进行比较。结果表明，PP / PAPP复合材料的LOI值可以达到27.5％，并且在25 wt％的PAPP负载下可以达到UL-94 V-2等级。同时，锥形量热法的结果表明，与纯PP相比，峰值放热率（PHRR）和总放热（THR）分别降低了69.3％和22.5％。加入5 wt％的PA6后，可以弥补由于PAPP早期分解而造成的碳源丢失，并且可以进一步略微降低PHRR和THR。通过FTIR光谱和X射线光电子能谱研究了PAPP的阻燃机理。含共轭双键的C‑N六元环，交联的磷酸盐结构形成稳定，膨胀，致密的炭层，极大地提高了PP的阻燃性。加入5 wt％的PA6后，可以弥补由于PAPP早期分解而造成的碳源丢失，并且可以进一步略微降低PHRR和THR。通过FTIR光谱和X射线光电子能谱研究了PAPP的阻燃机理。含共轭双键的C‑N六元环，交联的磷酸盐结构形成稳定，膨胀，致密的炭层，极大地提高了PP的阻燃性。加入5 wt％的PA6后，可以弥补由于PAPP早期分解而造成的碳源丢失，并且可以进一步略微降低PHRR和THR。通过FTIR光谱和X射线光电子能谱研究了PAPP的阻燃机理。含共轭双键的C‑N六元环，交联的磷酸盐结构形成稳定，膨胀，致密的炭层，极大地提高了PP的阻燃性。