CFA/APP协同阻燃动态硫化热塑性弹性体的制备及其性能
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摘要
将新型无羟基低聚三嗪衍生物(CFA)作为成炭剂与聚磷酸铵(APP)复配成膨胀型阻燃剂(IFR),并研究了不同含量和比例的IFR对动态硫化热塑性弹性体(TPV)阻燃性能、热稳定性能、流变性能和力学性能的影响。结果表明:IFR对TPV有良好的阻燃作用,当IFR(CFA与APP质量比1∶3)质量分数为40%时,TPV/IFR复合材料具有最佳的阻燃性能,极限氧指数为26.4%,且垂直燃烧测试等级为V-0级;TPV/IFR复合材料的热释放速率峰值与总热释放量均大幅降低;IFR能促使TPV/IFR复合材料形成更多的残炭,积分程序分解温度和表观活化能明显增加,材料的热稳定性显著提高;TPV/IFR复合材料虽然加工性能略有降低,但具有优异的力学性能,能满足加工使用要求。
The intumescent flame retardant(IFR) was prepared by compounding the novel un-hydroxyl oligomeric triazine derivatives(CFA) with ammonium polyphosphate(APP). The effects of IFR in different content and ratio on the flame retardant properties,thermal stability,rheological properties and mechanical properties of thermoplastic vulcanizates(TPV) were investigated. The results show that IFR has a good flame retardant effect on TPV. When the mass fraction of IFR(the mass ratio of CFA to APP is 1∶3) is 40%,the TPV/IFR composites perform best in flame retandancy whose limit oxygen index(LOI) is 26.4% and pass vertical flame test with V-0. Both the peak heat release rate(PHRR) and total heat release(THR) of the composites slump. Thermogravimetric(TG) analysis shows that IFR helps to form more char residues in the TPV/IFR composites,the integration procedure decomposition temperature and apparent activation energy are increased,and the thermal stability of the material is improved. Although the processing performance of the TPV/IFR composites is slightly reduced,it possesses excellent mechanical properties and still meets the requirements of processing and use.
The intumescent flame retardant(IFR) was prepared by compounding the novel un-hydroxyl oligomeric triazine derivatives(CFA) with ammonium polyphosphate(APP). The effects of IFR in different content and ratio on the flame retardant properties,thermal stability,rheological properties and mechanical properties of thermoplastic vulcanizates(TPV) were investigated. The results show that IFR has a good flame retardant effect on TPV. When the mass fraction of IFR(the mass ratio of CFA to APP is 1∶3) is 40%,the TPV/IFR composites perform best in flame retandancy whose limit oxygen index(LOI) is 26.4% and pass vertical flame test with V-0. Both the peak heat release rate(PHRR) and total heat release(THR) of the composites slump. Thermogravimetric(TG) analysis shows that IFR helps to form more char residues in the TPV/IFR composites,the integration procedure decomposition temperature and apparent activation energy are increased,and the thermal stability of the material is improved. Although the processing performance of the TPV/IFR composites is slightly reduced,it possesses excellent mechanical properties and still meets the requirements of processing and use.
引文
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[2]Walong A,Kaesaman A,Sakai T,et al. Properties of fire retardant thermoplastic vulcanizates from NR/PP blends filled with aluminium trihydrate and magnesium hydroxide with reference to the effect of mixing methods[J]. Adv Mater Res,2013,844:297-300.
[3]Wang Zhijing,Liu Yinfeng,Li Juan. Preparation of nucleotide-based microsphere and its application in intumescent flame retardant polypropylene[J]. J Analy Appl Pyroly,2016,121:394-402.
[4]Wang Zhengzhou,Wu Kun,Hu Yuan. Study on flame retardance of co-microencapsulated ammonium polyphosphate and dipentaerythritol in polypropylene[J].Polym Eng Sci,2008,48(12):2426-2431.
[5]Feng Caimin,Li Zongwen,Liang Minyi,et al. Preparation and characterization of a novel oligomeric charring agent and its application in halogen-free flame retardant polypropylene[J].J Analy Appl Pyroly,2015,111:238-246.
[6]Lai Xuejun,Yin Changyu,Li Hongqiang,et al. Synergistic effect between silicone-containing macromolecular charring agent and ammonium polyphosphate in flame retardant polypropylene[J]. J Appl Polym Sci,2015,132(10):1-10.
[7]Feng Caimin,Zhang Yi,Liu Siwei,et al. Synthesis of novel triazine charring agent and its effect in intumescent flameretardant polypropylene[J]. J Appl Polym Sci,2012,123(6):3208-3216.
[8]Feng Caimin,Liang Minyi,Chen Wenjing,et al. Flame retardancy and thermal degradation of intumescent flame retardant EVA composite with efficient charring agent[J]. J Analy Appl Pyroly,2015,113:266-273.
[9]李霈,张立娟,班大明.阻燃改性对PC/ABS合金热降解行为的影响[J].材料导报,2016,30(1):368-371.
[10]易宇文.新型三嗪炭源的制备及PP/IFRs体系阻燃与热稳定性的研究[D].南京:南京航空航天大学,2013.
[11]王诗凝. PP/POE/MVQ三元共混热塑性弹性体的制备及其性能研究[D].青岛:青岛科技大学,2016.
[12]唐萍,张春庆.橡胶加工分析仪在高分子物理实验教学中的应用[J].化工高等教育,2016,33(1):56-58.
[13]Isitman N A,Kaynak C. Nanoclay and carbon nanotubes as potential synergists of an organophosphorus flame-retardant in poly(methyl methacrylate)[J]. Polym Degrad Stab,2010,95(9):1523-1532.