121. Synthesis of a novel ionic liquid containing phosphorus and its application in intumescent flame retardant polypropylene system
作者：Yang, X.F., Ge, N.L., Hu, L.Y., Gui, H.K, Wang, Z.G. and Ding, Y.S.
關(guān)鍵字：含磷離子液體，阻燃，聚丙烯
論文來源：期刊
具體來源：Polym. Adv. Technol., 2013, 24, 568-575.
發(fā)表時(shí)間：2013年
A novel ionic liquid containing phosphorus ([PCMIM]Cl) was synthesized and characterized by FTIR, 1H NMR, 13C NMR and 31P NMR. Moreover, a new intumescent flame retardant (IFR) system, which was composed of [PCMIM]Cl and ammonium polyphosphate (APP), was used to impart flame retardancy and dripping resistance to polypropylene (PP). The flammability and thermal behaviors of intumescent flame-retarded PP (PP/IFR) composites were evaluated by limiting oxygen index (LOI), UL-94 test, thermogravimetric analysis (TGA) and cone calorimeter test. It was found that there was an obvious synergistic effect between [PCMIM]Cl and APP. When the weight ratio of [PCMIM]Cl and APP was 1:5 and the total amount of IFR was kept at 30 wt%, LOI value of PP/IFR composite reached 31.8, and V-0 rating was obtained. Moreover, both the peak heat release rate and the peak mass loss rate of PP/IFR composites decreased significantly relative to PP and PP/APP composite from cone calorimeter analysis. The TGA curves suggested that [PCMIM]Cl had good ability of char formation, and when combined with APP, it could greatly promote the char formation of PP/IFR composites, hence improved the flame retardancy. Additionally, the rheological behaviors and mechanical properties of PP/IFR composites were also investigated, and it was found that [PCMIM]Cl could also serve as an efficient lubricant and compatibilizer between APP and PP, endowing the materials with satisfying processability and mechanical properties.