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首页> 外文期刊>RSC Advances >Improvement of the flame retardancy of wood-fibre/polypropylene composites with ideal mechanical properties by a novel intumescent flame retardant system
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Improvement of the flame retardancy of wood-fibre/polypropylene composites with ideal mechanical properties by a novel intumescent flame retardant system

机译：用新型膨胀型阻燃系统改善木纤维/聚丙烯复合材料的阻燃性，具有理想的机械性能

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摘要

To improve the flame retardancy and maintain the ideal mechanical properties of the widely used wood fibre (WF) reinforced polypropylene (PP) composite (WPC), a novel intumescent flame retardant (IFR) system consisting of poly[N-4-bis(ethylenediamino)-phenyl phosphonic-N-2,N-6-bis(ethylenediamino)-1,3,5-triazine-N-phenyl phosphonate] (PTPA) and ammonium polyphosphate (APP) was developed. Addition of APP, a high performance flame retardant, improves flame retardancy but has a negative effect on flexural properties and the Notched Izod impact strength. Combining self-designed PTPA with WPC has a positive effect on the mechanical properties whereas it just slightly increases the flame retardancy. The flame retarded WPC system with both PTPA and APP, i.e. WPC/PTPA/APP, combines bilateral advantages. The selected formula has a flexural modulus of 4.4 GPa, flexural strength of 37.2 MPa and impact strength of 1.8 kJ m(-2), only the flexural strength is slightly lower than that of neat WPC. And the formula has a high limiting oxygen index (LOI) of 31.5%, which passes the UL-94 V-0 rating for a vertical burning test. The results of cone calorimetry show that the heat release rate (HRR) of the WPC/PTPA/APP system is significantly reduced compared to the neat WPC. The pyrolysis and char residue of the WPC/PTPA/APP system were investigated by thermogravimetric analysis (TGA), Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS). These results reveal the flame-retardant mechanism that PTPA/APP can synergistically catalyze the etherification, dehydration and char formation of WPC.
机译：为了改善阻燃性并保持广泛使用的木纤维（WF）增强聚丙烯（PP）复合（PP）复合（WPC）的理想力学性能，该新型膨胀阻燃剂（IFR）系统由Poly [N-4-BIS（乙二胺醛）组成） - 苯基膦-N-2，N-6-BIS（乙二胺醛）-1,3,5-三嗪-N-苯基膦酸酯（PTPA）和多磷酸铵（APP）。添加应用，高性能阻燃剂，改善阻燃性，但对弯曲性能和缺口的Izod冲击强度产生负面影响。将自行设计的PTPA与WPC相结合对机械性能具有积极影响，而它略微增加阻燃性。具有PTPA和APP的阻燃WPC系统，即WPC / PTPA / APP，结合了双边优势。所选配方具有4.4GPa的弯曲模量，弯曲强度为37.2MPa和冲击强度为1.8 kJ m（-2），只有弯曲强度略低于整齐WPC。并且配方具有31.5％的高限制氧指数（LOI），其通过垂直燃烧试验的UL-94 V-0等级。锥形量热法的结果表明，与整齐WPC相比，WPC / PTPA / APP系统的热释放率（HRR）显着降低。通过热重分析（TGA），傅里叶变换红外（FTIR）和X射线光电子谱（XPS）研究了WPC / PTPA / APP系统的热解和炭残余物。这些结果揭示了PTPA / APP可以协同催化WPC的醚化，脱水和炭形成的阻燃机制。

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  • 来源
    《RSC Advances》 |2015年第74期|共9页
  • 作者

    Guan Ya-Hui; Liao Wang; Xu Zhao-Zan; Chen Ming-Jun; Huang Jian-Qian; Wang Yu-Zhong;

  • 作者单位

    Sichuan Univ Ctr Degradable &

    Flame Retardant Polymer Mat Natl Engn Lab Ecofriendly Polymer Mat Sichuan State Key Lab Polymer Mat Engn Coll Chem Chengdu 610064 Peoples R China;

    Sichuan Univ Ctr Degradable &

    Flame Retardant Polymer Mat Natl Engn Lab Ecofriendly Polymer Mat Sichuan State Key Lab Polymer Mat Engn Coll Chem Chengdu 610064 Peoples R China;

    Sichuan Univ Ctr Degradable &

    Flame Retardant Polymer Mat Natl Engn Lab Ecofriendly Polymer Mat Sichuan State Key Lab Polymer Mat Engn Coll Chem Chengdu 610064 Peoples R China;

    Sichuan Univ Ctr Degradable &

    Flame Retardant Polymer Mat Natl Engn Lab Ecofriendly Polymer Mat Sichuan State Key Lab Polymer Mat Engn Coll Chem Chengdu 610064 Peoples R China;

    Sichuan Univ Ctr Degradable &

    Flame Retardant Polymer Mat Natl Engn Lab Ecofriendly Polymer Mat Sichuan State Key Lab Polymer Mat Engn Coll Chem Chengdu 610064 Peoples R China;

    Sichuan Univ Ctr Degradable &

    Flame Retardant Polymer Mat Natl Engn Lab Ecofriendly Polymer Mat Sichuan State Key Lab Polymer Mat Engn Coll Chem Chengdu 610064 Peoples R China;

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